./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-2.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 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:13:10,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:13:10,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:13:10,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:13:10,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:13:10,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:13:10,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:13:10,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:13:10,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:13:10,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:13:10,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:13:10,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:13:10,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:13:10,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:13:10,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:13:10,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:13:10,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:13:10,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:13:10,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:13:10,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:13:10,915 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:13:10,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:13:10,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:13:10,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:13:10,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:13:10,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:13:10,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:13:10,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:13:10,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:13:10,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:13:10,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:13:10,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:13:10,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:13:10,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:13:10,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:13:10,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:13:10,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:13:10,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:13:10,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:13:10,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:13:10,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:13:10,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:13:10,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:13:10,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:13:10,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:13:10,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:13:10,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:13:10,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:13:10,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:13:10,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:13:10,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:13:10,969 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:13:10,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:13:10,970 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:13:10,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:13:10,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:13:10,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:13:10,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:13:10,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:13:10,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:13:10,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:13:10,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:13:10,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:10,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:13:10,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:13:10,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:13:10,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:13:10,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:13:10,973 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:13:10,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:13:10,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:13:10,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-07-12 10:13:11,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:13:11,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:13:11,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:13:11,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:13:11,279 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:13:11,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-12 10:13:11,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c8d6e65/746f81c5eb8643f382fcdab61b06fb58/FLAGb50a01ef3 [2022-07-12 10:13:11,831 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:13:11,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-12 10:13:11,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c8d6e65/746f81c5eb8643f382fcdab61b06fb58/FLAGb50a01ef3 [2022-07-12 10:13:12,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c8d6e65/746f81c5eb8643f382fcdab61b06fb58 [2022-07-12 10:13:12,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:13:12,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:13:12,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:12,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:13:12,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:13:12,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:12" (1/1) ... [2022-07-12 10:13:12,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bcb278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:12, skipping insertion in model container [2022-07-12 10:13:12,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:12" (1/1) ... [2022-07-12 10:13:12,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:13:12,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:13:12,517 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:12,783 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-2.i[39095,39108] [2022-07-12 10:13:12,789 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-2.i[39180,39193] [2022-07-12 10:13:12,790 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-2.i[39232,39245] [2022-07-12 10:13:12,869 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-2.i[49285,49298] [2022-07-12 10:13:12,871 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-2.i[49334,49347] [2022-07-12 10:13:12,874 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-2.i[49462,49475] [2022-07-12 10:13:12,875 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-2.i[49520,49533] [2022-07-12 10:13:12,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:12,890 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:13:12,906 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:12,930 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-2.i[39095,39108] [2022-07-12 10:13:12,935 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-2.i[39180,39193] [2022-07-12 10:13:12,936 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-2.i[39232,39245] [2022-07-12 10:13:12,951 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-2.i[49285,49298] [2022-07-12 10:13:12,952 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-2.i[49334,49347] [2022-07-12 10:13:12,959 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-2.i[49462,49475] [2022-07-12 10:13:12,960 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-2.i[49520,49533] [2022-07-12 10:13:12,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:13,080 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:13:13,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13 WrapperNode [2022-07-12 10:13:13,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:13,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:13,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:13:13,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:13:13,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,159 INFO L137 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 190 [2022-07-12 10:13:13,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:13,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:13:13,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:13:13,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:13:13,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:13:13,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:13:13,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:13:13,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:13:13,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (1/1) ... [2022-07-12 10:13:13,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:13,242 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) [2022-07-12 10:13:13,255 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 [2022-07-12 10:13:13,301 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-12 10:13:13,301 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-12 10:13:13,301 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-12 10:13:13,302 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:13:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:13:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:13:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:13:13,304 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:13:13,438 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:13:13,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:13:13,716 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:13:13,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:13:13,725 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:13:13,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:13 BoogieIcfgContainer [2022-07-12 10:13:13,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:13:13,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:13:13,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:13:13,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:13:13,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:13:12" (1/3) ... [2022-07-12 10:13:13,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1065d306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:13, skipping insertion in model container [2022-07-12 10:13:13,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:13" (2/3) ... [2022-07-12 10:13:13,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1065d306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:13, skipping insertion in model container [2022-07-12 10:13:13,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:13" (3/3) ... [2022-07-12 10:13:13,735 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-07-12 10:13:13,740 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:13:13,748 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:13:13,749 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-12 10:13:13,749 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:13:13,838 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:13:13,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2022-07-12 10:13:13,971 INFO L129 PetriNetUnfolder]: 17/218 cut-off events. [2022-07-12 10:13:13,971 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:13:13,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 439 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-07-12 10:13:13,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2022-07-12 10:13:13,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 207 transitions, 423 flow [2022-07-12 10:13:13,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:14,002 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@102ff93b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@401bb3c [2022-07-12 10:13:14,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-12 10:13:14,033 INFO L129 PetriNetUnfolder]: 12/178 cut-off events. [2022-07-12 10:13:14,033 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:14,033 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:14,034 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] [2022-07-12 10:13:14,037 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)] === [2022-07-12 10:13:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1408739966, now seen corresponding path program 1 times [2022-07-12 10:13:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:14,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978449045] [2022-07-12 10:13:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:14,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978449045] [2022-07-12 10:13:14,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978449045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:14,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:14,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-12 10:13:14,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970972266] [2022-07-12 10:13:14,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:13:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:13:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:13:14,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 220 [2022-07-12 10:13:14,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 207 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 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) [2022-07-12 10:13:14,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:14,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 220 [2022-07-12 10:13:14,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:19,431 INFO L129 PetriNetUnfolder]: 6879/19842 cut-off events. [2022-07-12 10:13:19,432 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-07-12 10:13:19,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29408 conditions, 19842 events. 6879/19842 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 210483 event pairs, 3417 based on Foata normal form. 1588/19703 useless extension candidates. Maximal degree in co-relation 29206. Up to 7350 conditions per place. [2022-07-12 10:13:19,594 INFO L132 encePairwiseOnDemand]: 188/220 looper letters, 176 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2022-07-12 10:13:19,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 1136 flow [2022-07-12 10:13:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:13:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:13:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3581 transitions. [2022-07-12 10:13:19,614 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6260489510489511 [2022-07-12 10:13:19,615 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3581 transitions. [2022-07-12 10:13:19,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3581 transitions. [2022-07-12 10:13:19,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:19,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3581 transitions. [2022-07-12 10:13:19,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.73076923076923) internal successors, (3581), 26 states have internal predecessors, (3581), 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) [2022-07-12 10:13:19,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 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) [2022-07-12 10:13:19,651 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 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) [2022-07-12 10:13:19,653 INFO L186 Difference]: Start difference. First operand has 197 places, 207 transitions, 423 flow. Second operand 26 states and 3581 transitions. [2022-07-12 10:13:19,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 1136 flow [2022-07-12 10:13:19,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:13:19,666 INFO L242 Difference]: Finished difference. Result has 229 places, 228 transitions, 610 flow [2022-07-12 10:13:19,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=610, PETRI_PLACES=229, PETRI_TRANSITIONS=228} [2022-07-12 10:13:19,671 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 32 predicate places. [2022-07-12 10:13:19,671 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 610 flow [2022-07-12 10:13:19,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 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) [2022-07-12 10:13:19,673 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:19,673 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] [2022-07-12 10:13:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:13:19,674 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)] === [2022-07-12 10:13:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1531373137, now seen corresponding path program 1 times [2022-07-12 10:13:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603077941] [2022-07-12 10:13:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:19,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603077941] [2022-07-12 10:13:20,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603077941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:20,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:20,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:13:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077743540] [2022-07-12 10:13:20,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:20,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:13:20,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:13:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:13:20,093 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-12 10:13:20,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 228 transitions, 610 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:20,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:20,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-12 10:13:20,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:26,537 INFO L129 PetriNetUnfolder]: 11418/30484 cut-off events. [2022-07-12 10:13:26,538 INFO L130 PetriNetUnfolder]: For 3294/3300 co-relation queries the response was YES. [2022-07-12 10:13:26,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 30484 events. 11418/30484 cut-off events. For 3294/3300 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 347691 event pairs, 2230 based on Foata normal form. 92/28429 useless extension candidates. Maximal degree in co-relation 48956. Up to 7669 conditions per place. [2022-07-12 10:13:26,808 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 333 selfloop transitions, 100 changer transitions 31/584 dead transitions. [2022-07-12 10:13:26,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 584 transitions, 2392 flow [2022-07-12 10:13:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:13:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:13:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4636 transitions. [2022-07-12 10:13:26,821 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6385674931129477 [2022-07-12 10:13:26,822 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4636 transitions. [2022-07-12 10:13:26,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4636 transitions. [2022-07-12 10:13:26,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:26,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4636 transitions. [2022-07-12 10:13:26,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.4848484848485) internal successors, (4636), 33 states have internal predecessors, (4636), 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) [2022-07-12 10:13:26,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 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) [2022-07-12 10:13:26,854 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 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) [2022-07-12 10:13:26,854 INFO L186 Difference]: Start difference. First operand has 229 places, 228 transitions, 610 flow. Second operand 33 states and 4636 transitions. [2022-07-12 10:13:26,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 584 transitions, 2392 flow [2022-07-12 10:13:26,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 584 transitions, 2381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:13:26,902 INFO L242 Difference]: Finished difference. Result has 270 places, 299 transitions, 1209 flow [2022-07-12 10:13:26,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1209, PETRI_PLACES=270, PETRI_TRANSITIONS=299} [2022-07-12 10:13:26,903 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 73 predicate places. [2022-07-12 10:13:26,903 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 299 transitions, 1209 flow [2022-07-12 10:13:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:26,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:26,906 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] [2022-07-12 10:13:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:13:26,906 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)] === [2022-07-12 10:13:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2001167401, now seen corresponding path program 2 times [2022-07-12 10:13:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:26,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626548273] [2022-07-12 10:13:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:27,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626548273] [2022-07-12 10:13:27,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626548273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:27,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:27,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:13:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428666560] [2022-07-12 10:13:27,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:27,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:13:27,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:13:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:13:27,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-12 10:13:27,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 299 transitions, 1209 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:27,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:27,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-12 10:13:27,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:34,089 INFO L129 PetriNetUnfolder]: 13299/35931 cut-off events. [2022-07-12 10:13:34,089 INFO L130 PetriNetUnfolder]: For 18134/18206 co-relation queries the response was YES. [2022-07-12 10:13:34,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67496 conditions, 35931 events. 13299/35931 cut-off events. For 18134/18206 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 425381 event pairs, 2482 based on Foata normal form. 146/33543 useless extension candidates. Maximal degree in co-relation 66243. Up to 7717 conditions per place. [2022-07-12 10:13:34,435 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 345 selfloop transitions, 135 changer transitions 15/615 dead transitions. [2022-07-12 10:13:34,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 615 transitions, 3115 flow [2022-07-12 10:13:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:13:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:13:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4620 transitions. [2022-07-12 10:13:34,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-07-12 10:13:34,448 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4620 transitions. [2022-07-12 10:13:34,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4620 transitions. [2022-07-12 10:13:34,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:34,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4620 transitions. [2022-07-12 10:13:34,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.0) internal successors, (4620), 33 states have internal predecessors, (4620), 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) [2022-07-12 10:13:34,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 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) [2022-07-12 10:13:34,475 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 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) [2022-07-12 10:13:34,475 INFO L186 Difference]: Start difference. First operand has 270 places, 299 transitions, 1209 flow. Second operand 33 states and 4620 transitions. [2022-07-12 10:13:34,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 615 transitions, 3115 flow [2022-07-12 10:13:34,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 615 transitions, 3063 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-07-12 10:13:34,641 INFO L242 Difference]: Finished difference. Result has 303 places, 337 transitions, 1872 flow [2022-07-12 10:13:34,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1872, PETRI_PLACES=303, PETRI_TRANSITIONS=337} [2022-07-12 10:13:34,644 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 106 predicate places. [2022-07-12 10:13:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1872 flow [2022-07-12 10:13:34,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:34,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:34,646 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] [2022-07-12 10:13:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:13:34,646 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)] === [2022-07-12 10:13:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1592781447, now seen corresponding path program 3 times [2022-07-12 10:13:34,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:34,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793099640] [2022-07-12 10:13:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:35,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793099640] [2022-07-12 10:13:35,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793099640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:35,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:35,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:13:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996736818] [2022-07-12 10:13:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:35,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:13:35,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:13:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:13:35,174 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-12 10:13:35,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 337 transitions, 1872 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:35,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:35,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-12 10:13:35,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:42,159 INFO L129 PetriNetUnfolder]: 14235/39227 cut-off events. [2022-07-12 10:13:42,160 INFO L130 PetriNetUnfolder]: For 40129/40251 co-relation queries the response was YES. [2022-07-12 10:13:42,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79578 conditions, 39227 events. 14235/39227 cut-off events. For 40129/40251 co-relation queries the response was YES. Maximal size of possible extension queue 1174. Compared 473190 event pairs, 2046 based on Foata normal form. 182/36764 useless extension candidates. Maximal degree in co-relation 78337. Up to 7455 conditions per place. [2022-07-12 10:13:42,511 INFO L132 encePairwiseOnDemand]: 196/220 looper letters, 286 selfloop transitions, 157 changer transitions 8/571 dead transitions. [2022-07-12 10:13:42,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 571 transitions, 3522 flow [2022-07-12 10:13:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:13:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:13:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3766 transitions. [2022-07-12 10:13:42,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.634006734006734 [2022-07-12 10:13:42,522 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3766 transitions. [2022-07-12 10:13:42,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3766 transitions. [2022-07-12 10:13:42,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:42,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3766 transitions. [2022-07-12 10:13:42,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 139.4814814814815) internal successors, (3766), 27 states have internal predecessors, (3766), 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) [2022-07-12 10:13:42,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 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) [2022-07-12 10:13:42,545 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 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) [2022-07-12 10:13:42,545 INFO L186 Difference]: Start difference. First operand has 303 places, 337 transitions, 1872 flow. Second operand 27 states and 3766 transitions. [2022-07-12 10:13:42,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 571 transitions, 3522 flow [2022-07-12 10:13:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 571 transitions, 3414 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-12 10:13:42,842 INFO L242 Difference]: Finished difference. Result has 321 places, 366 transitions, 2527 flow [2022-07-12 10:13:42,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2527, PETRI_PLACES=321, PETRI_TRANSITIONS=366} [2022-07-12 10:13:42,843 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 124 predicate places. [2022-07-12 10:13:42,844 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 2527 flow [2022-07-12 10:13:42,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 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) [2022-07-12 10:13:42,845 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:42,845 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] [2022-07-12 10:13:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:13:42,846 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)] === [2022-07-12 10:13:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1799698503, now seen corresponding path program 1 times [2022-07-12 10:13:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575357378] [2022-07-12 10:13:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575357378] [2022-07-12 10:13:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575357378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:43,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:43,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-12 10:13:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834336033] [2022-07-12 10:13:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:43,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 10:13:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 10:13:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-07-12 10:13:43,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-12 10:13:43,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 366 transitions, 2527 flow. Second operand has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 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) [2022-07-12 10:13:43,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:43,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-12 10:13:43,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:03,978 INFO L129 PetriNetUnfolder]: 46421/107194 cut-off events. [2022-07-12 10:14:03,978 INFO L130 PetriNetUnfolder]: For 236203/236293 co-relation queries the response was YES. [2022-07-12 10:14:05,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263272 conditions, 107194 events. 46421/107194 cut-off events. For 236203/236293 co-relation queries the response was YES. Maximal size of possible extension queue 3129. Compared 1366961 event pairs, 2460 based on Foata normal form. 200/102041 useless extension candidates. Maximal degree in co-relation 260609. Up to 32726 conditions per place. [2022-07-12 10:14:05,641 INFO L132 encePairwiseOnDemand]: 184/220 looper letters, 976 selfloop transitions, 464 changer transitions 0/1550 dead transitions. [2022-07-12 10:14:05,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1550 transitions, 14221 flow [2022-07-12 10:14:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:14:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:14:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6769 transitions. [2022-07-12 10:14:05,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032976827094474 [2022-07-12 10:14:05,651 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6769 transitions. [2022-07-12 10:14:05,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6769 transitions. [2022-07-12 10:14:05,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:05,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6769 transitions. [2022-07-12 10:14:05,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 132.72549019607843) internal successors, (6769), 51 states have internal predecessors, (6769), 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) [2022-07-12 10:14:05,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 220.0) internal successors, (11440), 52 states have internal predecessors, (11440), 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) [2022-07-12 10:14:05,682 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 220.0) internal successors, (11440), 52 states have internal predecessors, (11440), 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) [2022-07-12 10:14:05,682 INFO L186 Difference]: Start difference. First operand has 321 places, 366 transitions, 2527 flow. Second operand 51 states and 6769 transitions. [2022-07-12 10:14:05,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1550 transitions, 14221 flow [2022-07-12 10:14:08,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1550 transitions, 13543 flow, removed 282 selfloop flow, removed 12 redundant places. [2022-07-12 10:14:08,079 INFO L242 Difference]: Finished difference. Result has 392 places, 752 transitions, 7832 flow [2022-07-12 10:14:08,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7832, PETRI_PLACES=392, PETRI_TRANSITIONS=752} [2022-07-12 10:14:08,081 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 195 predicate places. [2022-07-12 10:14:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 752 transitions, 7832 flow [2022-07-12 10:14:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 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) [2022-07-12 10:14:08,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:08,083 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] [2022-07-12 10:14:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:14:08,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-12 10:14:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2080907019, now seen corresponding path program 2 times [2022-07-12 10:14:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003325826] [2022-07-12 10:14:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:08,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003325826] [2022-07-12 10:14:08,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003325826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:14:08,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:14:08,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-12 10:14:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023311417] [2022-07-12 10:14:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:14:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 10:14:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 10:14:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-12 10:14:08,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-12 10:14:08,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 752 transitions, 7832 flow. Second operand has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 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) [2022-07-12 10:14:08,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:08,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-12 10:14:08,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand