./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 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-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-?-f4b24e3 [2022-07-13 21:53:24,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:53:24,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:53:25,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:53:25,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:53:25,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:53:25,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:53:25,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:53:25,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:53:25,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:53:25,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:53:25,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:53:25,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:53:25,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:53:25,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:53:25,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:53:25,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:53:25,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:53:25,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:53:25,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:53:25,058 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:53:25,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:53:25,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:53:25,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:53:25,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:53:25,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:53:25,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:53:25,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:53:25,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:53:25,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:53:25,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:53:25,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:53:25,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:53:25,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:53:25,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:53:25,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:53:25,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:53:25,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:53:25,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:53:25,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:53:25,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:53:25,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:53:25,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:53:25,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:53:25,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:53:25,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:53:25,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:53:25,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:53:25,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:53:25,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:53:25,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:53:25,118 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:53:25,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:53:25,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:53:25,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:53:25,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:53:25,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:53:25,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:53:25,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:53:25,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:53:25,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:53:25,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:53:25,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:53:25,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:53:25,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:53:25,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:53:25,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:53:25,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:25,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:53:25,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:53:25,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:53:25,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:53:25,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:53:25,123 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:53:25,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:53:25,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:53:25,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-07-13 21:53:25,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:53:25,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:53:25,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:53:25,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:53:25,368 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:53:25,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-13 21:53:25,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae935cf/21b770c5eae74045ba36d246554e6697/FLAGf31970ceb [2022-07-13 21:53:25,928 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:53:25,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-13 21:53:25,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae935cf/21b770c5eae74045ba36d246554e6697/FLAGf31970ceb [2022-07-13 21:53:26,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ae935cf/21b770c5eae74045ba36d246554e6697 [2022-07-13 21:53:26,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:53:26,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:53:26,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:26,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:53:26,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:53:26,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4542539b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26, skipping insertion in model container [2022-07-13 21:53:26,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:53:26,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:53:26,476 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:26,696 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] [2022-07-13 21:53:26,702 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] [2022-07-13 21:53:26,703 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] [2022-07-13 21:53:26,750 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] [2022-07-13 21:53:26,750 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] [2022-07-13 21:53:26,752 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] [2022-07-13 21:53:26,753 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] [2022-07-13 21:53:26,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:26,768 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:53:26,776 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:26,800 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] [2022-07-13 21:53:26,801 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] [2022-07-13 21:53:26,801 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] [2022-07-13 21:53:26,820 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] [2022-07-13 21:53:26,821 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] [2022-07-13 21:53:26,822 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] [2022-07-13 21:53:26,822 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] [2022-07-13 21:53:26,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:26,887 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:53:26,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26 WrapperNode [2022-07-13 21:53:26,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:26,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:26,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:53:26,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:53:26,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,947 INFO L137 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 190 [2022-07-13 21:53:26,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:26,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:53:26,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:53:26,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:53:26,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:26,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:53:26,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:53:26,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:53:26,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:53:26,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (1/1) ... [2022-07-13 21:53:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:27,029 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 21:53:27,031 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 21:53:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-13 21:53:27,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-13 21:53:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-13 21:53:27,057 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:53:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:53:27,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:53:27,058 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 21:53:27,167 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:53:27,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:53:27,504 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:53:27,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:53:27,514 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 21:53:27,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:27 BoogieIcfgContainer [2022-07-13 21:53:27,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:53:27,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:53:27,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:53:27,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:53:27,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:53:26" (1/3) ... [2022-07-13 21:53:27,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175946bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:27, skipping insertion in model container [2022-07-13 21:53:27,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:26" (2/3) ... [2022-07-13 21:53:27,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175946bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:27, skipping insertion in model container [2022-07-13 21:53:27,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:27" (3/3) ... [2022-07-13 21:53:27,525 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-07-13 21:53:27,530 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:53:27,540 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:53:27,540 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-13 21:53:27,540 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:53:27,624 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:53:27,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2022-07-13 21:53:27,772 INFO L129 PetriNetUnfolder]: 17/218 cut-off events. [2022-07-13 21:53:27,773 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:53:27,782 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. [2022-07-13 21:53:27,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2022-07-13 21:53:27,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 207 transitions, 423 flow [2022-07-13 21:53:27,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:27,826 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@68abe890, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b14b1d9 [2022-07-13 21:53:27,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-13 21:53:27,872 INFO L129 PetriNetUnfolder]: 12/178 cut-off events. [2022-07-13 21:53:27,872 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:27,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:27,874 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] [2022-07-13 21:53:27,875 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 21:53:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1408739966, now seen corresponding path program 1 times [2022-07-13 21:53:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750882462] [2022-07-13 21:53:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:28,680 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 21:53:28,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:28,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750882462] [2022-07-13 21:53:28,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750882462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:28,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:28,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:53:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352272776] [2022-07-13 21:53:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:28,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:53:28,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:53:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:53:28,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 220 [2022-07-13 21:53:28,744 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) [2022-07-13 21:53:28,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:28,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 220 [2022-07-13 21:53:28,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:33,322 INFO L129 PetriNetUnfolder]: 6879/19842 cut-off events. [2022-07-13 21:53:33,323 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-07-13 21:53:33,396 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. [2022-07-13 21:53:33,491 INFO L132 encePairwiseOnDemand]: 188/220 looper letters, 176 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2022-07-13 21:53:33,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 1136 flow [2022-07-13 21:53:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 21:53:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 21:53:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3581 transitions. [2022-07-13 21:53:33,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6260489510489511 [2022-07-13 21:53:33,516 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3581 transitions. [2022-07-13 21:53:33,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3581 transitions. [2022-07-13 21:53:33,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:33,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3581 transitions. [2022-07-13 21:53:33,537 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) [2022-07-13 21:53:33,555 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) [2022-07-13 21:53:33,559 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) [2022-07-13 21:53:33,562 INFO L186 Difference]: Start difference. First operand has 197 places, 207 transitions, 423 flow. Second operand 26 states and 3581 transitions. [2022-07-13 21:53:33,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 1136 flow [2022-07-13 21:53:33,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:53:33,584 INFO L242 Difference]: Finished difference. Result has 229 places, 228 transitions, 610 flow [2022-07-13 21:53:33,586 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} [2022-07-13 21:53:33,591 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 32 predicate places. [2022-07-13 21:53:33,591 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 610 flow [2022-07-13 21:53:33,593 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) [2022-07-13 21:53:33,594 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:33,594 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] [2022-07-13 21:53:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:53:33,595 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 21:53:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1531373137, now seen corresponding path program 1 times [2022-07-13 21:53:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126036532] [2022-07-13 21:53:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:34,133 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 21:53:34,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:34,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126036532] [2022-07-13 21:53:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126036532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:34,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:34,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-13 21:53:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216395288] [2022-07-13 21:53:34,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 21:53:34,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 21:53:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:53:34,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-13 21:53:34,143 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) [2022-07-13 21:53:34,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:34,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-13 21:53:34,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:40,600 INFO L129 PetriNetUnfolder]: 11418/30484 cut-off events. [2022-07-13 21:53:40,600 INFO L130 PetriNetUnfolder]: For 3294/3300 co-relation queries the response was YES. [2022-07-13 21:53:40,735 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. [2022-07-13 21:53:40,870 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 333 selfloop transitions, 100 changer transitions 31/584 dead transitions. [2022-07-13 21:53:40,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 584 transitions, 2392 flow [2022-07-13 21:53:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:53:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:53:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4636 transitions. [2022-07-13 21:53:40,881 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6385674931129477 [2022-07-13 21:53:40,882 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4636 transitions. [2022-07-13 21:53:40,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4636 transitions. [2022-07-13 21:53:40,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:40,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4636 transitions. [2022-07-13 21:53:40,893 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) [2022-07-13 21:53:40,906 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) [2022-07-13 21:53:40,910 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) [2022-07-13 21:53:40,910 INFO L186 Difference]: Start difference. First operand has 229 places, 228 transitions, 610 flow. Second operand 33 states and 4636 transitions. [2022-07-13 21:53:40,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 584 transitions, 2392 flow [2022-07-13 21:53:40,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 584 transitions, 2381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 21:53:40,957 INFO L242 Difference]: Finished difference. Result has 270 places, 299 transitions, 1209 flow [2022-07-13 21:53:40,958 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} [2022-07-13 21:53:40,958 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 73 predicate places. [2022-07-13 21:53:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 299 transitions, 1209 flow [2022-07-13 21:53:40,960 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) [2022-07-13 21:53:40,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:40,961 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] [2022-07-13 21:53:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:53:40,961 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 21:53:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2001167401, now seen corresponding path program 2 times [2022-07-13 21:53:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431010118] [2022-07-13 21:53:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:41,373 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 21:53:41,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431010118] [2022-07-13 21:53:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431010118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:41,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:41,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-13 21:53:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094966259] [2022-07-13 21:53:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 21:53:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 21:53:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:53:41,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-13 21:53:41,382 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) [2022-07-13 21:53:41,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:41,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-13 21:53:41,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:48,184 INFO L129 PetriNetUnfolder]: 13299/35931 cut-off events. [2022-07-13 21:53:48,185 INFO L130 PetriNetUnfolder]: For 18134/18206 co-relation queries the response was YES. [2022-07-13 21:53:48,404 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. [2022-07-13 21:53:48,754 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 345 selfloop transitions, 135 changer transitions 15/615 dead transitions. [2022-07-13 21:53:48,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 615 transitions, 3115 flow [2022-07-13 21:53:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:53:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:53:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4620 transitions. [2022-07-13 21:53:48,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-07-13 21:53:48,766 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4620 transitions. [2022-07-13 21:53:48,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4620 transitions. [2022-07-13 21:53:48,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:48,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4620 transitions. [2022-07-13 21:53:48,777 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) [2022-07-13 21:53:48,789 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) [2022-07-13 21:53:48,791 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) [2022-07-13 21:53:48,791 INFO L186 Difference]: Start difference. First operand has 270 places, 299 transitions, 1209 flow. Second operand 33 states and 4620 transitions. [2022-07-13 21:53:48,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 615 transitions, 3115 flow [2022-07-13 21:53:48,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 615 transitions, 3063 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-07-13 21:53:48,957 INFO L242 Difference]: Finished difference. Result has 303 places, 337 transitions, 1872 flow [2022-07-13 21:53:48,958 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} [2022-07-13 21:53:48,960 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 106 predicate places. [2022-07-13 21:53:48,960 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1872 flow [2022-07-13 21:53:48,961 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) [2022-07-13 21:53:48,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:48,962 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] [2022-07-13 21:53:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:53:48,962 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 21:53:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1592781447, now seen corresponding path program 3 times [2022-07-13 21:53:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118553773] [2022-07-13 21:53:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:49,371 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 21:53:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:49,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118553773] [2022-07-13 21:53:49,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118553773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:49,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:49,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-13 21:53:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513089582] [2022-07-13 21:53:49,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 21:53:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 21:53:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 21:53:49,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-13 21:53:49,378 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) [2022-07-13 21:53:49,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:49,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-13 21:53:49,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:56,341 INFO L129 PetriNetUnfolder]: 14235/39227 cut-off events. [2022-07-13 21:53:56,341 INFO L130 PetriNetUnfolder]: For 40129/40251 co-relation queries the response was YES. [2022-07-13 21:53:56,820 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. [2022-07-13 21:53:56,977 INFO L132 encePairwiseOnDemand]: 196/220 looper letters, 286 selfloop transitions, 157 changer transitions 8/571 dead transitions. [2022-07-13 21:53:56,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 571 transitions, 3522 flow [2022-07-13 21:53:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:53:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:53:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3766 transitions. [2022-07-13 21:53:56,991 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.634006734006734 [2022-07-13 21:53:56,992 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3766 transitions. [2022-07-13 21:53:56,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3766 transitions. [2022-07-13 21:53:57,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:57,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3766 transitions. [2022-07-13 21:53:57,022 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) [2022-07-13 21:53:57,034 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) [2022-07-13 21:53:57,036 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) [2022-07-13 21:53:57,036 INFO L186 Difference]: Start difference. First operand has 303 places, 337 transitions, 1872 flow. Second operand 27 states and 3766 transitions. [2022-07-13 21:53:57,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 571 transitions, 3522 flow [2022-07-13 21:53:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 571 transitions, 3414 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-13 21:53:57,331 INFO L242 Difference]: Finished difference. Result has 321 places, 366 transitions, 2527 flow [2022-07-13 21:53:57,332 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} [2022-07-13 21:53:57,333 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 124 predicate places. [2022-07-13 21:53:57,333 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 2527 flow [2022-07-13 21:53:57,334 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) [2022-07-13 21:53:57,334 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:57,334 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] [2022-07-13 21:53:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:53:57,335 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 21:53:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1799698503, now seen corresponding path program 1 times [2022-07-13 21:53:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447348816] [2022-07-13 21:53:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:57,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:58,103 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 21:53:58,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447348816] [2022-07-13 21:53:58,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447348816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:58,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:58,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-13 21:53:58,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305554014] [2022-07-13 21:53:58,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:53:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:53:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:53:58,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-13 21:53:58,111 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) [2022-07-13 21:53:58,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:58,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-13 21:53:58,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:18,526 INFO L129 PetriNetUnfolder]: 46421/107194 cut-off events. [2022-07-13 21:54:18,527 INFO L130 PetriNetUnfolder]: For 236203/236293 co-relation queries the response was YES. [2022-07-13 21:54:20,176 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. [2022-07-13 21:54:20,626 INFO L132 encePairwiseOnDemand]: 184/220 looper letters, 976 selfloop transitions, 464 changer transitions 0/1550 dead transitions. [2022-07-13 21:54:20,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1550 transitions, 14221 flow [2022-07-13 21:54:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 21:54:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-13 21:54:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6769 transitions. [2022-07-13 21:54:20,639 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032976827094474 [2022-07-13 21:54:20,640 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6769 transitions. [2022-07-13 21:54:20,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6769 transitions. [2022-07-13 21:54:20,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:20,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6769 transitions. [2022-07-13 21:54:20,659 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) [2022-07-13 21:54:20,675 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) [2022-07-13 21:54:20,678 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) [2022-07-13 21:54:20,678 INFO L186 Difference]: Start difference. First operand has 321 places, 366 transitions, 2527 flow. Second operand 51 states and 6769 transitions. [2022-07-13 21:54:20,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1550 transitions, 14221 flow [2022-07-13 21:54:23,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1550 transitions, 13543 flow, removed 282 selfloop flow, removed 12 redundant places. [2022-07-13 21:54:23,257 INFO L242 Difference]: Finished difference. Result has 392 places, 752 transitions, 7832 flow [2022-07-13 21:54:23,258 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} [2022-07-13 21:54:23,258 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 195 predicate places. [2022-07-13 21:54:23,258 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 752 transitions, 7832 flow [2022-07-13 21:54:23,260 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) [2022-07-13 21:54:23,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:23,260 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] [2022-07-13 21:54:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:54:23,260 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)] === [2022-07-13 21:54:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2080907019, now seen corresponding path program 2 times [2022-07-13 21:54:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579708813] [2022-07-13 21:54:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:24,021 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 21:54:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:24,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579708813] [2022-07-13 21:54:24,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579708813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:24,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:24,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-13 21:54:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119813322] [2022-07-13 21:54:24,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:54:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:54:24,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:54:24,027 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-13 21:54:24,029 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) [2022-07-13 21:54:24,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:24,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-13 21:54:24,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand