./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 f4b24e32 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-?-f4b24e3 [2022-07-13 21:53:23,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:53:23,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:53:23,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:53:23,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:53:23,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:53:23,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:53:23,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:53:23,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:53:23,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:53:23,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:53:23,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:53:23,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:53:23,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:53:23,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:53:23,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:53:23,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:53:23,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:53:23,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:53:23,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:53:23,253 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:53:23,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:53:23,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:53:23,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:53:23,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:53:23,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:53:23,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:53:23,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:53:23,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:53:23,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:53:23,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:53:23,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:53:23,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:53:23,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:53:23,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:53:23,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:53:23,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:53:23,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:53:23,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:53:23,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:53:23,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:53:23,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:53:23,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:53:23,291 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:53:23,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:53:23,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:53:23,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:53:23,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:53:23,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:53:23,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:53:23,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:53:23,293 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:53:23,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:53:23,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:53:23,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:53:23,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:53:23,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:53:23,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:53:23,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:53:23,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:53:23,295 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:53:23,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:53:23,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:53:23,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:53:23,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:53:23,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:53:23,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:53:23,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:23,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:53:23,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:53:23,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:53:23,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-07-13 21:53:23,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:53:23,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:53:23,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:53:23,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:53:23,504 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:53:23,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-13 21:53:23,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4f8957e0/fef748d9b0ea4b06aacbbf20ccef8116/FLAG64a6866e6 [2022-07-13 21:53:23,988 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:53:23,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-13 21:53:23,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4f8957e0/fef748d9b0ea4b06aacbbf20ccef8116/FLAG64a6866e6 [2022-07-13 21:53:24,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4f8957e0/fef748d9b0ea4b06aacbbf20ccef8116 [2022-07-13 21:53:24,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:53:24,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:53:24,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:24,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:53:24,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:53:24,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4f4cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24, skipping insertion in model container [2022-07-13 21:53:24,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:53:24,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:53:24,506 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:24,727 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] [2022-07-13 21:53:24,731 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] [2022-07-13 21:53:24,732 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] [2022-07-13 21:53:24,786 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] [2022-07-13 21:53:24,787 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] [2022-07-13 21:53:24,788 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] [2022-07-13 21:53:24,789 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] [2022-07-13 21:53:24,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:24,811 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:53:24,819 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:24,833 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] [2022-07-13 21:53:24,833 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] [2022-07-13 21:53:24,834 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] [2022-07-13 21:53:24,873 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] [2022-07-13 21:53:24,874 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] [2022-07-13 21:53:24,874 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] [2022-07-13 21:53:24,875 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] [2022-07-13 21:53:24,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:24,919 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:53:24,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24 WrapperNode [2022-07-13 21:53:24,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:24,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:24,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:53:24,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:53:24,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,958 INFO L137 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-07-13 21:53:24,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:24,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:53:24,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:53:24,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:53:24,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:24,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:25,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:25,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:25,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:53:25,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:53:25,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:53:25,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:53:25,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (1/1) ... [2022-07-13 21:53:25,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:25,057 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) [2022-07-13 21:53:25,075 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 [2022-07-13 21:53:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-13 21:53:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-13 21:53:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-13 21:53:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-13 21:53:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:53:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:53:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:53:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:53:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:53:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:53:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:53:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:53:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:53:25,091 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:53:25,180 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:53:25,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:53:25,442 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:53:25,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:53:25,449 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 21:53:25,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:25 BoogieIcfgContainer [2022-07-13 21:53:25,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:53:25,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:53:25,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:53:25,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:53:25,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:53:24" (1/3) ... [2022-07-13 21:53:25,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540401d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:25, skipping insertion in model container [2022-07-13 21:53:25,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:24" (2/3) ... [2022-07-13 21:53:25,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540401d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:25, skipping insertion in model container [2022-07-13 21:53:25,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:25" (3/3) ... [2022-07-13 21:53:25,458 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-07-13 21:53:25,461 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:53:25,468 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:53:25,468 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-13 21:53:25,469 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:53:25,553 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:53:25,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 233 transitions, 482 flow [2022-07-13 21:53:25,644 INFO L129 PetriNetUnfolder]: 17/231 cut-off events. [2022-07-13 21:53:25,645 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:53:25,654 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. [2022-07-13 21:53:25,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 233 transitions, 482 flow [2022-07-13 21:53:25,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 220 transitions, 449 flow [2022-07-13 21:53:25,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:25,672 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@40138844, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19a421b7 [2022-07-13 21:53:25,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-13 21:53:25,728 INFO L129 PetriNetUnfolder]: 11/188 cut-off events. [2022-07-13 21:53:25,728 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:25,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:25,729 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] [2022-07-13 21:53:25,730 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)] === [2022-07-13 21:53:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 508547485, now seen corresponding path program 1 times [2022-07-13 21:53:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124897396] [2022-07-13 21:53:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:25,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124897396] [2022-07-13 21:53:26,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124897396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:26,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:26,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:53:26,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359598227] [2022-07-13 21:53:26,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:53:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:53:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:53:26,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 233 [2022-07-13 21:53:26,481 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) [2022-07-13 21:53:26,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:26,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 233 [2022-07-13 21:53:26,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:30,201 INFO L129 PetriNetUnfolder]: 6891/21160 cut-off events. [2022-07-13 21:53:30,202 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-07-13 21:53:30,251 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. [2022-07-13 21:53:30,324 INFO L132 encePairwiseOnDemand]: 201/233 looper letters, 182 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-07-13 21:53:30,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 1174 flow [2022-07-13 21:53:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 21:53:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 21:53:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3769 transitions. [2022-07-13 21:53:30,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622152525586002 [2022-07-13 21:53:30,341 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3769 transitions. [2022-07-13 21:53:30,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3769 transitions. [2022-07-13 21:53:30,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:30,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3769 transitions. [2022-07-13 21:53:30,355 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) [2022-07-13 21:53:30,367 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) [2022-07-13 21:53:30,370 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) [2022-07-13 21:53:30,372 INFO L186 Difference]: Start difference. First operand has 210 places, 220 transitions, 449 flow. Second operand 26 states and 3769 transitions. [2022-07-13 21:53:30,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 1174 flow [2022-07-13 21:53:30,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:53:30,385 INFO L242 Difference]: Finished difference. Result has 242 places, 241 transitions, 636 flow [2022-07-13 21:53:30,387 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} [2022-07-13 21:53:30,390 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 32 predicate places. [2022-07-13 21:53:30,390 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 241 transitions, 636 flow [2022-07-13 21:53:30,392 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) [2022-07-13 21:53:30,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:30,392 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] [2022-07-13 21:53:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:53:30,393 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)] === [2022-07-13 21:53:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1573639700, now seen corresponding path program 1 times [2022-07-13 21:53:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:30,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250165224] [2022-07-13 21:53:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250165224] [2022-07-13 21:53:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250165224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:30,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:30,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-13 21:53:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585993157] [2022-07-13 21:53:30,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:30,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 21:53:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 21:53:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:53:30,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 233 [2022-07-13 21:53:30,805 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) [2022-07-13 21:53:30,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:30,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 233 [2022-07-13 21:53:30,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:35,055 INFO L129 PetriNetUnfolder]: 8787/26100 cut-off events. [2022-07-13 21:53:35,055 INFO L130 PetriNetUnfolder]: For 2473/2479 co-relation queries the response was YES. [2022-07-13 21:53:35,142 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. [2022-07-13 21:53:35,218 INFO L132 encePairwiseOnDemand]: 209/233 looper letters, 221 selfloop transitions, 67 changer transitions 8/424 dead transitions. [2022-07-13 21:53:35,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 1675 flow [2022-07-13 21:53:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:53:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:53:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3219 transitions. [2022-07-13 21:53:35,224 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6279750292625829 [2022-07-13 21:53:35,224 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3219 transitions. [2022-07-13 21:53:35,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3219 transitions. [2022-07-13 21:53:35,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3219 transitions. [2022-07-13 21:53:35,231 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) [2022-07-13 21:53:35,237 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) [2022-07-13 21:53:35,240 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) [2022-07-13 21:53:35,240 INFO L186 Difference]: Start difference. First operand has 242 places, 241 transitions, 636 flow. Second operand 22 states and 3219 transitions. [2022-07-13 21:53:35,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 1675 flow [2022-07-13 21:53:35,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 1664 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 21:53:35,265 INFO L242 Difference]: Finished difference. Result has 267 places, 286 transitions, 1026 flow [2022-07-13 21:53:35,266 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} [2022-07-13 21:53:35,266 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 57 predicate places. [2022-07-13 21:53:35,266 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 1026 flow [2022-07-13 21:53:35,268 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) [2022-07-13 21:53:35,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:35,268 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] [2022-07-13 21:53:35,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:53:35,269 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)] === [2022-07-13 21:53:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1121263530, now seen corresponding path program 1 times [2022-07-13 21:53:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410340419] [2022-07-13 21:53:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:35,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:35,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410340419] [2022-07-13 21:53:35,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410340419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:35,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:35,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-13 21:53:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050099010] [2022-07-13 21:53:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:35,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:53:35,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:53:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:53:35,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-13 21:53:35,798 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) [2022-07-13 21:53:35,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:35,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-13 21:53:35,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:45,283 INFO L129 PetriNetUnfolder]: 20350/56173 cut-off events. [2022-07-13 21:53:45,283 INFO L130 PetriNetUnfolder]: For 22511/22539 co-relation queries the response was YES. [2022-07-13 21:53:45,596 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. [2022-07-13 21:53:45,785 INFO L132 encePairwiseOnDemand]: 204/233 looper letters, 580 selfloop transitions, 160 changer transitions 2/865 dead transitions. [2022-07-13 21:53:45,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 865 transitions, 4698 flow [2022-07-13 21:53:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:53:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:53:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5363 transitions. [2022-07-13 21:53:45,926 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622085604918223 [2022-07-13 21:53:45,927 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5363 transitions. [2022-07-13 21:53:45,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5363 transitions. [2022-07-13 21:53:45,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:45,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5363 transitions. [2022-07-13 21:53:45,943 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) [2022-07-13 21:53:45,953 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) [2022-07-13 21:53:45,956 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) [2022-07-13 21:53:45,956 INFO L186 Difference]: Start difference. First operand has 267 places, 286 transitions, 1026 flow. Second operand 37 states and 5363 transitions. [2022-07-13 21:53:45,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 865 transitions, 4698 flow [2022-07-13 21:53:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 865 transitions, 4618 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-07-13 21:53:46,030 INFO L242 Difference]: Finished difference. Result has 317 places, 404 transitions, 2183 flow [2022-07-13 21:53:46,031 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} [2022-07-13 21:53:46,033 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-07-13 21:53:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 404 transitions, 2183 flow [2022-07-13 21:53:46,034 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) [2022-07-13 21:53:46,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:46,034 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] [2022-07-13 21:53:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:53:46,035 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)] === [2022-07-13 21:53:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash -80024368, now seen corresponding path program 2 times [2022-07-13 21:53:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:46,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979193568] [2022-07-13 21:53:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:46,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:46,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979193568] [2022-07-13 21:53:46,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979193568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:46,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:46,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-13 21:53:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749614394] [2022-07-13 21:53:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:46,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 21:53:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 21:53:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-07-13 21:53:46,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-13 21:53:46,617 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) [2022-07-13 21:53:46,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:46,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-13 21:53:46,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:58,494 INFO L129 PetriNetUnfolder]: 27406/69290 cut-off events. [2022-07-13 21:53:58,494 INFO L130 PetriNetUnfolder]: For 51830/52016 co-relation queries the response was YES. [2022-07-13 21:53:59,201 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. [2022-07-13 21:53:59,408 INFO L132 encePairwiseOnDemand]: 203/233 looper letters, 492 selfloop transitions, 217 changer transitions 0/832 dead transitions. [2022-07-13 21:53:59,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 832 transitions, 5246 flow [2022-07-13 21:53:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 21:53:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-13 21:53:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5036 transitions. [2022-07-13 21:53:59,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6175352544451257 [2022-07-13 21:53:59,416 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5036 transitions. [2022-07-13 21:53:59,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5036 transitions. [2022-07-13 21:53:59,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:59,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5036 transitions. [2022-07-13 21:53:59,428 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) [2022-07-13 21:53:59,452 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) [2022-07-13 21:53:59,454 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) [2022-07-13 21:53:59,454 INFO L186 Difference]: Start difference. First operand has 317 places, 404 transitions, 2183 flow. Second operand 35 states and 5036 transitions. [2022-07-13 21:53:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 832 transitions, 5246 flow [2022-07-13 21:54:00,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 832 transitions, 5164 flow, removed 29 selfloop flow, removed 9 redundant places. [2022-07-13 21:54:00,020 INFO L242 Difference]: Finished difference. Result has 354 places, 452 transitions, 3102 flow [2022-07-13 21:54:00,021 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} [2022-07-13 21:54:00,021 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 144 predicate places. [2022-07-13 21:54:00,021 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 452 transitions, 3102 flow [2022-07-13 21:54:00,022 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) [2022-07-13 21:54:00,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:00,023 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] [2022-07-13 21:54:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:54:00,023 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)] === [2022-07-13 21:54:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1907524322, now seen corresponding path program 3 times [2022-07-13 21:54:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:00,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201638906] [2022-07-13 21:54:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:00,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201638906] [2022-07-13 21:54:00,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201638906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:00,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:00,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-13 21:54:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780289099] [2022-07-13 21:54:00,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:00,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:54:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:54:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:54:00,676 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 233 [2022-07-13 21:54:00,679 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) [2022-07-13 21:54:00,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:00,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 233 [2022-07-13 21:54:00,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:23,649 INFO L129 PetriNetUnfolder]: 50055/121444 cut-off events. [2022-07-13 21:54:23,649 INFO L130 PetriNetUnfolder]: For 162443/162538 co-relation queries the response was YES. [2022-07-13 21:54:25,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278425 conditions, 121444 events. 50055/121444 cut-off events. For 162443/162538 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 1599938 event pairs, 6356 based on Foata normal form. 206/115155 useless extension candidates. Maximal degree in co-relation 275453. Up to 35988 conditions per place. [2022-07-13 21:54:25,705 INFO L132 encePairwiseOnDemand]: 197/233 looper letters, 888 selfloop transitions, 318 changer transitions 0/1324 dead transitions. [2022-07-13 21:54:25,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1324 transitions, 10252 flow [2022-07-13 21:54:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 21:54:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-13 21:54:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 7158 transitions. [2022-07-13 21:54:25,712 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6023731380964403 [2022-07-13 21:54:25,712 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 7158 transitions. [2022-07-13 21:54:25,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 7158 transitions. [2022-07-13 21:54:25,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:25,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 7158 transitions.