./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 eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-divine/ring_2w1r-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-?-eb692b5 [2022-07-19 21:15:10,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:15:10,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:15:10,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:15:10,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:15:10,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:15:10,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:15:10,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:15:10,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:15:10,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:15:10,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:15:10,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:15:10,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:15:10,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:15:10,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:15:10,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:15:10,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:15:10,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:15:10,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:15:10,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:15:10,983 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:15:10,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:15:10,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:15:10,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:15:10,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:15:10,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:15:10,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:15:10,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:15:10,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:15:10,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:15:10,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:15:10,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:15:10,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:15:10,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:15:10,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:15:10,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:15:10,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:15:10,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:15:10,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:15:10,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:15:10,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:15:11,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:15:11,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:15:11,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:15:11,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:15:11,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:15:11,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:15:11,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:15:11,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:15:11,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:15:11,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:15:11,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:15:11,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:11,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:15:11,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:15:11,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-07-19 21:15:11,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:15:11,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:15:11,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:15:11,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:15:11,260 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:15:11,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-19 21:15:11,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca49d5aa/1703f7a18cfd43589ac3a84cb4fa85e3/FLAG9794e10c9 [2022-07-19 21:15:11,735 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:15:11,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-19 21:15:11,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca49d5aa/1703f7a18cfd43589ac3a84cb4fa85e3/FLAG9794e10c9 [2022-07-19 21:15:11,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca49d5aa/1703f7a18cfd43589ac3a84cb4fa85e3 [2022-07-19 21:15:11,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:15:11,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:15:11,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:11,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:15:11,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:15:11,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:11" (1/1) ... [2022-07-19 21:15:11,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f36902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:11, skipping insertion in model container [2022-07-19 21:15:11,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:11" (1/1) ... [2022-07-19 21:15:11,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:15:11,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:15:11,921 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:12,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-07-19 21:15:12,108 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] [2022-07-19 21:15:12,109 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] [2022-07-19 21:15:12,174 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] [2022-07-19 21:15:12,175 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] [2022-07-19 21:15:12,177 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] [2022-07-19 21:15:12,178 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] [2022-07-19 21:15:12,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:12,191 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:15:12,205 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:12,221 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] [2022-07-19 21:15:12,227 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] [2022-07-19 21:15:12,228 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] [2022-07-19 21:15:12,243 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] [2022-07-19 21:15:12,244 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] [2022-07-19 21:15:12,248 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] [2022-07-19 21:15:12,251 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] [2022-07-19 21:15:12,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:12,305 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:15:12,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12 WrapperNode [2022-07-19 21:15:12,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:12,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:12,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:15:12,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:15:12,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,366 INFO L137 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 190 [2022-07-19 21:15:12,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:12,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:15:12,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:15:12,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:15:12,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:15:12,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:15:12,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:15:12,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:15:12,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (1/1) ... [2022-07-19 21:15:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:12,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:15:12,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:15:12,457 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-19 21:15:12,457 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-19 21:15:12,457 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-19 21:15:12,457 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-19 21:15:12,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:15:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:15:12,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:15:12,459 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:15:12,535 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:15:12,537 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:12,830 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:12,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:12,849 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:15:12,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:12 BoogieIcfgContainer [2022-07-19 21:15:12,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:12,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:12,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:12,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:15:11" (1/3) ... [2022-07-19 21:15:12,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f05723d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:12, skipping insertion in model container [2022-07-19 21:15:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:12" (2/3) ... [2022-07-19 21:15:12,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f05723d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:12, skipping insertion in model container [2022-07-19 21:15:12,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:12" (3/3) ... [2022-07-19 21:15:12,861 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-07-19 21:15:12,865 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:12,874 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:12,874 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-19 21:15:12,875 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:12,975 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:15:13,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2022-07-19 21:15:13,100 INFO L129 PetriNetUnfolder]: 17/218 cut-off events. [2022-07-19 21:15:13,101 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:15:13,107 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. [2022-07-19 21:15:13,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2022-07-19 21:15:13,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 207 transitions, 423 flow [2022-07-19 21:15:13,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:13,139 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@61f1ebf1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46e78c2 [2022-07-19 21:15:13,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-19 21:15:13,179 INFO L129 PetriNetUnfolder]: 12/178 cut-off events. [2022-07-19 21:15:13,180 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:13,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:13,180 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] [2022-07-19 21:15:13,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-19 21:15:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1408739966, now seen corresponding path program 1 times [2022-07-19 21:15:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:13,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766494804] [2022-07-19 21:15:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:13,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:13,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766494804] [2022-07-19 21:15:13,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766494804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:13,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:13,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 21:15:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737054093] [2022-07-19 21:15:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:15:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:15:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:15:13,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 220 [2022-07-19 21:15:13,860 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) [2022-07-19 21:15:13,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:13,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 220 [2022-07-19 21:15:13,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:17,260 INFO L129 PetriNetUnfolder]: 6879/19842 cut-off events. [2022-07-19 21:15:17,261 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-07-19 21:15:17,329 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. [2022-07-19 21:15:17,400 INFO L132 encePairwiseOnDemand]: 188/220 looper letters, 176 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2022-07-19 21:15:17,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 1136 flow [2022-07-19 21:15:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:15:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:15:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3581 transitions. [2022-07-19 21:15:17,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6260489510489511 [2022-07-19 21:15:17,417 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3581 transitions. [2022-07-19 21:15:17,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3581 transitions. [2022-07-19 21:15:17,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:17,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3581 transitions. [2022-07-19 21:15:17,442 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) [2022-07-19 21:15:17,461 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) [2022-07-19 21:15:17,464 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) [2022-07-19 21:15:17,465 INFO L186 Difference]: Start difference. First operand has 197 places, 207 transitions, 423 flow. Second operand 26 states and 3581 transitions. [2022-07-19 21:15:17,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 1136 flow [2022-07-19 21:15:17,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:15:17,475 INFO L242 Difference]: Finished difference. Result has 229 places, 228 transitions, 610 flow [2022-07-19 21:15:17,477 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} [2022-07-19 21:15:17,479 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 32 predicate places. [2022-07-19 21:15:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 610 flow [2022-07-19 21:15:17,481 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) [2022-07-19 21:15:17,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:17,481 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] [2022-07-19 21:15:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:17,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-19 21:15:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1531373137, now seen corresponding path program 1 times [2022-07-19 21:15:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:17,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039280262] [2022-07-19 21:15:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:17,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:17,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039280262] [2022-07-19 21:15:17,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039280262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:17,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:17,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:15:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824862155] [2022-07-19 21:15:17,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:17,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:15:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:17,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:15:17,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:15:17,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-19 21:15:17,859 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) [2022-07-19 21:15:17,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:17,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-19 21:15:17,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:23,108 INFO L129 PetriNetUnfolder]: 11418/30484 cut-off events. [2022-07-19 21:15:23,109 INFO L130 PetriNetUnfolder]: For 3294/3300 co-relation queries the response was YES. [2022-07-19 21:15:23,325 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. [2022-07-19 21:15:23,415 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 333 selfloop transitions, 100 changer transitions 31/584 dead transitions. [2022-07-19 21:15:23,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 584 transitions, 2392 flow [2022-07-19 21:15:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:15:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:15:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4636 transitions. [2022-07-19 21:15:23,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6385674931129477 [2022-07-19 21:15:23,423 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4636 transitions. [2022-07-19 21:15:23,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4636 transitions. [2022-07-19 21:15:23,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:23,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4636 transitions. [2022-07-19 21:15:23,432 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) [2022-07-19 21:15:23,442 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) [2022-07-19 21:15:23,445 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) [2022-07-19 21:15:23,446 INFO L186 Difference]: Start difference. First operand has 229 places, 228 transitions, 610 flow. Second operand 33 states and 4636 transitions. [2022-07-19 21:15:23,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 584 transitions, 2392 flow [2022-07-19 21:15:23,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 584 transitions, 2381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:15:23,487 INFO L242 Difference]: Finished difference. Result has 270 places, 299 transitions, 1209 flow [2022-07-19 21:15:23,487 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} [2022-07-19 21:15:23,488 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 73 predicate places. [2022-07-19 21:15:23,488 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 299 transitions, 1209 flow [2022-07-19 21:15:23,489 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) [2022-07-19 21:15:23,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:23,490 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] [2022-07-19 21:15:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:15:23,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-19 21:15:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:23,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2001167401, now seen corresponding path program 2 times [2022-07-19 21:15:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780304747] [2022-07-19 21:15:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:23,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780304747] [2022-07-19 21:15:23,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780304747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:23,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:23,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:15:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443891501] [2022-07-19 21:15:23,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:15:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:15:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:15:23,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-19 21:15:23,904 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) [2022-07-19 21:15:23,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:23,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-19 21:15:23,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:30,212 INFO L129 PetriNetUnfolder]: 13299/35931 cut-off events. [2022-07-19 21:15:30,213 INFO L130 PetriNetUnfolder]: For 18134/18206 co-relation queries the response was YES. [2022-07-19 21:15:30,426 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. [2022-07-19 21:15:30,528 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 345 selfloop transitions, 135 changer transitions 15/615 dead transitions. [2022-07-19 21:15:30,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 615 transitions, 3115 flow [2022-07-19 21:15:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:15:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:15:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4620 transitions. [2022-07-19 21:15:30,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-07-19 21:15:30,537 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4620 transitions. [2022-07-19 21:15:30,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4620 transitions. [2022-07-19 21:15:30,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:30,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4620 transitions. [2022-07-19 21:15:30,547 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) [2022-07-19 21:15:30,556 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) [2022-07-19 21:15:30,559 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) [2022-07-19 21:15:30,559 INFO L186 Difference]: Start difference. First operand has 270 places, 299 transitions, 1209 flow. Second operand 33 states and 4620 transitions. [2022-07-19 21:15:30,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 615 transitions, 3115 flow [2022-07-19 21:15:30,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 615 transitions, 3063 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-07-19 21:15:30,655 INFO L242 Difference]: Finished difference. Result has 303 places, 337 transitions, 1872 flow [2022-07-19 21:15:30,656 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} [2022-07-19 21:15:30,658 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 106 predicate places. [2022-07-19 21:15:30,658 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1872 flow [2022-07-19 21:15:30,659 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) [2022-07-19 21:15:30,659 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:30,659 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] [2022-07-19 21:15:30,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:30,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-19 21:15:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1592781447, now seen corresponding path program 3 times [2022-07-19 21:15:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:30,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713611629] [2022-07-19 21:15:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713611629] [2022-07-19 21:15:31,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713611629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:31,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:31,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:15:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373380166] [2022-07-19 21:15:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:31,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:15:31,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:15:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:15:31,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-19 21:15:31,198 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) [2022-07-19 21:15:31,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:31,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-19 21:15:31,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:37,600 INFO L129 PetriNetUnfolder]: 14235/39227 cut-off events. [2022-07-19 21:15:37,601 INFO L130 PetriNetUnfolder]: For 40129/40251 co-relation queries the response was YES. [2022-07-19 21:15:37,843 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. [2022-07-19 21:15:37,947 INFO L132 encePairwiseOnDemand]: 196/220 looper letters, 286 selfloop transitions, 157 changer transitions 8/571 dead transitions. [2022-07-19 21:15:37,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 571 transitions, 3522 flow [2022-07-19 21:15:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:15:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:15:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3766 transitions. [2022-07-19 21:15:37,952 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.634006734006734 [2022-07-19 21:15:37,952 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3766 transitions. [2022-07-19 21:15:37,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3766 transitions. [2022-07-19 21:15:37,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:37,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3766 transitions. [2022-07-19 21:15:37,959 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) [2022-07-19 21:15:37,964 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) [2022-07-19 21:15:37,965 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) [2022-07-19 21:15:37,965 INFO L186 Difference]: Start difference. First operand has 303 places, 337 transitions, 1872 flow. Second operand 27 states and 3766 transitions. [2022-07-19 21:15:37,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 571 transitions, 3522 flow [2022-07-19 21:15:38,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 571 transitions, 3414 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-19 21:15:38,151 INFO L242 Difference]: Finished difference. Result has 321 places, 366 transitions, 2527 flow [2022-07-19 21:15:38,151 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} [2022-07-19 21:15:38,152 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 124 predicate places. [2022-07-19 21:15:38,152 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 2527 flow [2022-07-19 21:15:38,153 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) [2022-07-19 21:15:38,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:38,153 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] [2022-07-19 21:15:38,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:15:38,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-19 21:15:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1799698503, now seen corresponding path program 1 times [2022-07-19 21:15:38,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:38,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31819950] [2022-07-19 21:15:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:38,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31819950] [2022-07-19 21:15:38,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31819950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:38,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:38,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-19 21:15:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422072290] [2022-07-19 21:15:38,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 21:15:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 21:15:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-07-19 21:15:38,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-19 21:15:38,910 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) [2022-07-19 21:15:38,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:38,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-19 21:15:38,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:57,581 INFO L129 PetriNetUnfolder]: 46421/107194 cut-off events. [2022-07-19 21:15:57,581 INFO L130 PetriNetUnfolder]: For 236203/236293 co-relation queries the response was YES. [2022-07-19 21:15:58,840 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. [2022-07-19 21:15:59,189 INFO L132 encePairwiseOnDemand]: 184/220 looper letters, 976 selfloop transitions, 464 changer transitions 0/1550 dead transitions. [2022-07-19 21:15:59,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1550 transitions, 14221 flow [2022-07-19 21:15:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 21:15:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-19 21:15:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6769 transitions. [2022-07-19 21:15:59,196 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032976827094474 [2022-07-19 21:15:59,196 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6769 transitions. [2022-07-19 21:15:59,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6769 transitions. [2022-07-19 21:15:59,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:59,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6769 transitions. [2022-07-19 21:15:59,209 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) [2022-07-19 21:15:59,218 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) [2022-07-19 21:15:59,220 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) [2022-07-19 21:15:59,220 INFO L186 Difference]: Start difference. First operand has 321 places, 366 transitions, 2527 flow. Second operand 51 states and 6769 transitions. [2022-07-19 21:15:59,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1550 transitions, 14221 flow [2022-07-19 21:16:01,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1550 transitions, 13543 flow, removed 282 selfloop flow, removed 12 redundant places. [2022-07-19 21:16:01,033 INFO L242 Difference]: Finished difference. Result has 392 places, 752 transitions, 7832 flow [2022-07-19 21:16:01,033 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} [2022-07-19 21:16:01,034 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 195 predicate places. [2022-07-19 21:16:01,034 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 752 transitions, 7832 flow [2022-07-19 21:16:01,035 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) [2022-07-19 21:16:01,035 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:01,035 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] [2022-07-19 21:16:01,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:16:01,036 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)] === [2022-07-19 21:16:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2080907019, now seen corresponding path program 2 times [2022-07-19 21:16:01,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544881595] [2022-07-19 21:16:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:01,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:01,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544881595] [2022-07-19 21:16:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544881595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:01,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:01,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-19 21:16:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902690543] [2022-07-19 21:16:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 21:16:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:01,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 21:16:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-19 21:16:01,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-19 21:16:01,645 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) [2022-07-19 21:16:01,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:01,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-19 21:16:01,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand