./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/barrier_2t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-divine/barrier_2t.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 f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:13:01,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:13:01,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:13:01,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:13:01,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:13:01,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:13:01,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:13:01,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:13:01,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:13:01,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:13:01,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:13:01,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:13:01,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:13:01,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:13:01,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:13:01,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:13:01,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:13:01,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:13:01,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:13:01,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:13:01,277 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:13:01,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:13:01,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:13:01,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:13:01,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:13:01,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:13:01,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:13:01,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:13:01,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:13:01,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:13:01,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:13:01,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:13:01,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:13:01,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:13:01,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:13:01,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:13:01,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:13:01,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:13:01,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:13:01,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:13:01,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:13:01,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:13:01,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:13:01,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:13:01,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:13:01,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:13:01,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:13:01,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:13:01,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:13:01,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:13:01,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:13:01,323 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:13:01,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:13:01,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:13:01,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:13:01,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:13:01,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:13:01,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:13:01,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:13:01,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:13:01,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:13:01,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:13:01,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:01,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:13:01,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:13:01,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:13:01,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:13:01,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:13:01,329 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:13:01,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:13:01,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:13:01,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 [2022-07-12 10:13:01,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:13:01,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:13:01,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:13:01,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:13:01,545 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:13:01,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-12 10:13:01,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a8ad603/1a216fc875c049eb926d8b36a4b48375/FLAGb2ffb4e88 [2022-07-12 10:13:02,129 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:13:02,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-12 10:13:02,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a8ad603/1a216fc875c049eb926d8b36a4b48375/FLAGb2ffb4e88 [2022-07-12 10:13:02,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a8ad603/1a216fc875c049eb926d8b36a4b48375 [2022-07-12 10:13:02,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:13:02,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:13:02,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:02,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:13:02,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:13:02,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:02,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a9073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02, skipping insertion in model container [2022-07-12 10:13:02,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:02,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:13:02,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:13:02,626 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:02,751 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/barrier_2t.i[30484,30497] [2022-07-12 10:13:02,779 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/barrier_2t.i[31858,31871] [2022-07-12 10:13:02,785 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/barrier_2t.i[31909,31922] [2022-07-12 10:13:02,788 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32058,32071] [2022-07-12 10:13:02,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32135,32148] [2022-07-12 10:13:02,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32182,32195] [2022-07-12 10:13:02,794 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/barrier_2t.i[32291,32304] [2022-07-12 10:13:02,796 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/barrier_2t.i[32410,32423] [2022-07-12 10:13:02,797 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/barrier_2t.i[32458,32471] [2022-07-12 10:13:02,799 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/barrier_2t.i[32535,32548] [2022-07-12 10:13:02,801 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/barrier_2t.i[32661,32674] [2022-07-12 10:13:02,810 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/barrier_2t.i[33244,33257] [2022-07-12 10:13:02,818 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/barrier_2t.i[33321,33334] [2022-07-12 10:13:02,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:02,832 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:13:02,852 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:02,866 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/barrier_2t.i[30484,30497] [2022-07-12 10:13:02,872 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/barrier_2t.i[31858,31871] [2022-07-12 10:13:02,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[31909,31922] [2022-07-12 10:13:02,874 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32058,32071] [2022-07-12 10:13:02,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32135,32148] [2022-07-12 10:13:02,876 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/barrier_2t.i[32182,32195] [2022-07-12 10:13:02,877 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/barrier_2t.i[32291,32304] [2022-07-12 10:13:02,878 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/barrier_2t.i[32410,32423] [2022-07-12 10:13:02,878 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/barrier_2t.i[32458,32471] [2022-07-12 10:13:02,879 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/barrier_2t.i[32535,32548] [2022-07-12 10:13:02,880 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/barrier_2t.i[32661,32674] [2022-07-12 10:13:02,885 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/barrier_2t.i[33244,33257] [2022-07-12 10:13:02,885 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/barrier_2t.i[33321,33334] [2022-07-12 10:13:02,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:02,924 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:13:02,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02 WrapperNode [2022-07-12 10:13:02,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:02,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:02,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:13:02,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:13:02,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:02,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,018 INFO L137 Inliner]: procedures = 174, calls = 78, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 521 [2022-07-12 10:13:03,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:03,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:13:03,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:13:03,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:13:03,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:13:03,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:13:03,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:13:03,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:13:03,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (1/1) ... [2022-07-12 10:13:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:03,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:13:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:13:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:13:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:13:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:13:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-12 10:13:03,165 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:13:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:13:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:13:03,167 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:13:03,281 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:13:03,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:13:04,011 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:13:04,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:13:04,029 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2022-07-12 10:13:04,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:04 BoogieIcfgContainer [2022-07-12 10:13:04,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:13:04,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:13:04,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:13:04,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:13:04,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:13:02" (1/3) ... [2022-07-12 10:13:04,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f8dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:04, skipping insertion in model container [2022-07-12 10:13:04,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:02" (2/3) ... [2022-07-12 10:13:04,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f8dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:04, skipping insertion in model container [2022-07-12 10:13:04,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:04" (3/3) ... [2022-07-12 10:13:04,040 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier_2t.i [2022-07-12 10:13:04,046 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:13:04,054 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:13:04,055 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-12 10:13:04,055 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:13:04,184 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:13:04,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 514 places, 581 transitions, 1170 flow [2022-07-12 10:13:04,525 INFO L129 PetriNetUnfolder]: 106/858 cut-off events. [2022-07-12 10:13:04,526 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:04,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 858 events. 106/858 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3081 event pairs, 0 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 512. Up to 4 conditions per place. [2022-07-12 10:13:04,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 581 transitions, 1170 flow [2022-07-12 10:13:04,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 581 transitions, 1170 flow [2022-07-12 10:13:04,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:04,587 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@44aa3820, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@415b77e2 [2022-07-12 10:13:04,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-12 10:13:04,595 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-12 10:13:04,595 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:04,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:04,596 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] [2022-07-12 10:13:04,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash 682126804, now seen corresponding path program 1 times [2022-07-12 10:13:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:04,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956522719] [2022-07-12 10:13:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956522719] [2022-07-12 10:13:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956522719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:04,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:04,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:13:04,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404620286] [2022-07-12 10:13:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:04,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:13:04,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:13:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:13:04,861 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 581 [2022-07-12 10:13:04,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 581 transitions, 1170 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:04,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:04,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 581 [2022-07-12 10:13:04,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:05,057 INFO L129 PetriNetUnfolder]: 40/792 cut-off events. [2022-07-12 10:13:05,057 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:13:05,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 792 events. 40/792 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2911 event pairs, 0 based on Foata normal form. 66/780 useless extension candidates. Maximal degree in co-relation 473. Up to 4 conditions per place. [2022-07-12 10:13:05,074 INFO L132 encePairwiseOnDemand]: 538/581 looper letters, 2 selfloop transitions, 0 changer transitions 0/538 dead transitions. [2022-07-12 10:13:05,076 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 538 transitions, 1088 flow [2022-07-12 10:13:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:13:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:13:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1117 transitions. [2022-07-12 10:13:05,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9612736660929432 [2022-07-12 10:13:05,101 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1117 transitions. [2022-07-12 10:13:05,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1117 transitions. [2022-07-12 10:13:05,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:05,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1117 transitions. [2022-07-12 10:13:05,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 558.5) internal successors, (1117), 2 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,127 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,130 INFO L186 Difference]: Start difference. First operand has 514 places, 581 transitions, 1170 flow. Second operand 2 states and 1117 transitions. [2022-07-12 10:13:05,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 538 transitions, 1088 flow [2022-07-12 10:13:05,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 538 transitions, 1088 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:13:05,155 INFO L242 Difference]: Finished difference. Result has 515 places, 538 transitions, 1084 flow [2022-07-12 10:13:05,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1084, PETRI_PLACES=515, PETRI_TRANSITIONS=538} [2022-07-12 10:13:05,163 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2022-07-12 10:13:05,163 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 538 transitions, 1084 flow [2022-07-12 10:13:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,165 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:05,165 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] [2022-07-12 10:13:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:13:05,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1870030157, now seen corresponding path program 1 times [2022-07-12 10:13:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:05,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891804881] [2022-07-12 10:13:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:05,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:05,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891804881] [2022-07-12 10:13:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891804881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:05,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:05,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:13:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587593154] [2022-07-12 10:13:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:13:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:13:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:13:05,290 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-12 10:13:05,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 538 transitions, 1084 flow. Second operand has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:05,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-12 10:13:05,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:05,466 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-12 10:13:05,467 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:13:05,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 798 events. 40/798 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2909 event pairs, 0 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 819. Up to 12 conditions per place. [2022-07-12 10:13:05,485 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 15 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-07-12 10:13:05,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 544 transitions, 1130 flow [2022-07-12 10:13:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:13:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:13:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1599 transitions. [2022-07-12 10:13:05,489 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173838209982789 [2022-07-12 10:13:05,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1599 transitions. [2022-07-12 10:13:05,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1599 transitions. [2022-07-12 10:13:05,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:05,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1599 transitions. [2022-07-12 10:13:05,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,499 INFO L186 Difference]: Start difference. First operand has 515 places, 538 transitions, 1084 flow. Second operand 3 states and 1599 transitions. [2022-07-12 10:13:05,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 544 transitions, 1130 flow [2022-07-12 10:13:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 544 transitions, 1130 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:13:05,510 INFO L242 Difference]: Finished difference. Result has 518 places, 539 transitions, 1096 flow [2022-07-12 10:13:05,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1096, PETRI_PLACES=518, PETRI_TRANSITIONS=539} [2022-07-12 10:13:05,512 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 4 predicate places. [2022-07-12 10:13:05,512 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 539 transitions, 1096 flow [2022-07-12 10:13:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:05,514 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] [2022-07-12 10:13:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:13:05,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1201829103, now seen corresponding path program 1 times [2022-07-12 10:13:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493110478] [2022-07-12 10:13:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:05,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493110478] [2022-07-12 10:13:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493110478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:05,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44450020] [2022-07-12 10:13:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:05,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:05,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:13:05,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:13:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 10:13:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:05,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:05,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44450020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:05,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:05,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-12 10:13:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027174177] [2022-07-12 10:13:05,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:13:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:13:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:13:05,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-12 10:13:05,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 539 transitions, 1096 flow. Second operand has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:05,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-12 10:13:05,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:06,114 INFO L129 PetriNetUnfolder]: 40/800 cut-off events. [2022-07-12 10:13:06,114 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:13:06,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 800 events. 40/800 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2900 event pairs, 0 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 827. Up to 7 conditions per place. [2022-07-12 10:13:06,130 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 14 selfloop transitions, 4 changer transitions 0/545 dead transitions. [2022-07-12 10:13:06,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 545 transitions, 1144 flow [2022-07-12 10:13:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:13:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:13:06,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-12 10:13:06,135 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-12 10:13:06,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-12 10:13:06,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-12 10:13:06,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:06,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-12 10:13:06,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,147 INFO L186 Difference]: Start difference. First operand has 518 places, 539 transitions, 1096 flow. Second operand 4 states and 2127 transitions. [2022-07-12 10:13:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 545 transitions, 1144 flow [2022-07-12 10:13:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 545 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:06,157 INFO L242 Difference]: Finished difference. Result has 522 places, 540 transitions, 1114 flow [2022-07-12 10:13:06,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1114, PETRI_PLACES=522, PETRI_TRANSITIONS=540} [2022-07-12 10:13:06,159 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-12 10:13:06,159 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 540 transitions, 1114 flow [2022-07-12 10:13:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:06,161 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:06,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:13:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:06,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -24715469, now seen corresponding path program 2 times [2022-07-12 10:13:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042688687] [2022-07-12 10:13:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:06,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:06,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042688687] [2022-07-12 10:13:06,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042688687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:06,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:06,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:13:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153892578] [2022-07-12 10:13:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:06,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:13:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:13:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:13:06,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 581 [2022-07-12 10:13:06,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 540 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:06,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 581 [2022-07-12 10:13:06,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:06,640 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-12 10:13:06,640 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-12 10:13:06,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 798 events. 40/798 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2897 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 823. Up to 5 conditions per place. [2022-07-12 10:13:06,659 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 5 selfloop transitions, 2 changer transitions 0/538 dead transitions. [2022-07-12 10:13:06,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 538 transitions, 1124 flow [2022-07-12 10:13:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:13:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:13:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2128 transitions. [2022-07-12 10:13:06,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9156626506024096 [2022-07-12 10:13:06,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2128 transitions. [2022-07-12 10:13:06,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2128 transitions. [2022-07-12 10:13:06,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:06,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2128 transitions. [2022-07-12 10:13:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,680 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,680 INFO L186 Difference]: Start difference. First operand has 522 places, 540 transitions, 1114 flow. Second operand 4 states and 2128 transitions. [2022-07-12 10:13:06,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 538 transitions, 1124 flow [2022-07-12 10:13:06,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 538 transitions, 1120 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:06,690 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1110 flow [2022-07-12 10:13:06,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-12 10:13:06,693 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-12 10:13:06,694 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1110 flow [2022-07-12 10:13:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:06,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:06,696 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:13:06,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1817996092, now seen corresponding path program 1 times [2022-07-12 10:13:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:06,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810039771] [2022-07-12 10:13:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810039771] [2022-07-12 10:13:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810039771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:06,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444950884] [2022-07-12 10:13:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:06,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:06,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:13:06,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:13:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 10:13:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:07,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:13:07,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444950884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:07,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:13:07,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-12 10:13:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515070960] [2022-07-12 10:13:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:13:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:13:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:13:07,023 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-12 10:13:07,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1110 flow. Second operand has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:07,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:07,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-12 10:13:07,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:07,174 INFO L129 PetriNetUnfolder]: 40/793 cut-off events. [2022-07-12 10:13:07,174 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:13:07,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 793 events. 40/793 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2863 event pairs, 0 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 820. Up to 5 conditions per place. [2022-07-12 10:13:07,193 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 7 selfloop transitions, 3 changer transitions 0/538 dead transitions. [2022-07-12 10:13:07,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 538 transitions, 1128 flow [2022-07-12 10:13:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:13:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:13:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-12 10:13:07,198 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-12 10:13:07,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-12 10:13:07,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-12 10:13:07,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:07,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-12 10:13:07,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:07,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:07,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:07,209 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1110 flow. Second operand 4 states and 2127 transitions. [2022-07-12 10:13:07,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 538 transitions, 1128 flow [2022-07-12 10:13:07,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 538 transitions, 1121 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:13:07,219 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1116 flow [2022-07-12 10:13:07,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-12 10:13:07,223 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-12 10:13:07,223 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1116 flow [2022-07-12 10:13:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:07,225 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:07,225 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:07,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:13:07,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:07,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1162500929, now seen corresponding path program 1 times [2022-07-12 10:13:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119531346] [2022-07-12 10:13:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:07,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119531346] [2022-07-12 10:13:08,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119531346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:08,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:08,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 10:13:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038517745] [2022-07-12 10:13:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:13:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:13:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:13:08,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-12 10:13:08,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1116 flow. Second operand has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:08,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:08,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-12 10:13:08,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:11,528 INFO L129 PetriNetUnfolder]: 3485/15852 cut-off events. [2022-07-12 10:13:11,529 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:13:11,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 15852 events. 3485/15852 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 162984 event pairs, 1605 based on Foata normal form. 0/14208 useless extension candidates. Maximal degree in co-relation 21603. Up to 4593 conditions per place. [2022-07-12 10:13:11,619 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 265 selfloop transitions, 21 changer transitions 0/682 dead transitions. [2022-07-12 10:13:11,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 682 transitions, 1976 flow [2022-07-12 10:13:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:13:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:13:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 6230 transitions. [2022-07-12 10:13:11,636 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.714859437751004 [2022-07-12 10:13:11,636 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 6230 transitions. [2022-07-12 10:13:11,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 6230 transitions. [2022-07-12 10:13:11,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:11,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 6230 transitions. [2022-07-12 10:13:11,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 415.3333333333333) internal successors, (6230), 15 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:11,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:11,682 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:11,682 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1116 flow. Second operand 15 states and 6230 transitions. [2022-07-12 10:13:11,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 682 transitions, 1976 flow [2022-07-12 10:13:11,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 682 transitions, 1975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:11,696 INFO L242 Difference]: Finished difference. Result has 540 places, 549 transitions, 1221 flow [2022-07-12 10:13:11,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1221, PETRI_PLACES=540, PETRI_TRANSITIONS=549} [2022-07-12 10:13:11,699 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 26 predicate places. [2022-07-12 10:13:11,699 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 549 transitions, 1221 flow [2022-07-12 10:13:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:11,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:11,702 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:11,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:13:11,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1614772030, now seen corresponding path program 1 times [2022-07-12 10:13:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:11,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582651917] [2022-07-12 10:13:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:11,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:11,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582651917] [2022-07-12 10:13:11,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582651917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:11,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:11,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:13:11,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359038021] [2022-07-12 10:13:11,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:11,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:13:11,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:11,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:13:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:13:11,755 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-12 10:13:11,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 549 transitions, 1221 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:11,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:11,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-12 10:13:11,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:12,022 INFO L129 PetriNetUnfolder]: 89/1606 cut-off events. [2022-07-12 10:13:12,025 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-12 10:13:12,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1606 events. 89/1606 cut-off events. For 28/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 9185 event pairs, 0 based on Foata normal form. 1/1447 useless extension candidates. Maximal degree in co-relation 1696. Up to 12 conditions per place. [2022-07-12 10:13:12,046 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 7 selfloop transitions, 2 changer transitions 0/548 dead transitions. [2022-07-12 10:13:12,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 548 transitions, 1233 flow [2022-07-12 10:13:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:13:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:13:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1597 transitions. [2022-07-12 10:13:12,052 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9162363740676994 [2022-07-12 10:13:12,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1597 transitions. [2022-07-12 10:13:12,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1597 transitions. [2022-07-12 10:13:12,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:12,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1597 transitions. [2022-07-12 10:13:12,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:12,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:12,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:12,060 INFO L186 Difference]: Start difference. First operand has 540 places, 549 transitions, 1221 flow. Second operand 3 states and 1597 transitions. [2022-07-12 10:13:12,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 548 transitions, 1233 flow [2022-07-12 10:13:12,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 548 transitions, 1214 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-12 10:13:12,073 INFO L242 Difference]: Finished difference. Result has 533 places, 548 transitions, 1200 flow [2022-07-12 10:13:12,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1200, PETRI_PLACES=533, PETRI_TRANSITIONS=548} [2022-07-12 10:13:12,075 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 19 predicate places. [2022-07-12 10:13:12,075 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 548 transitions, 1200 flow [2022-07-12 10:13:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:12,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:12,076 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:13:12,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1746328945, now seen corresponding path program 1 times [2022-07-12 10:13:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:12,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925720484] [2022-07-12 10:13:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925720484] [2022-07-12 10:13:12,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925720484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:12,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:12,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-12 10:13:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701586729] [2022-07-12 10:13:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:12,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:13:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:13:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:13:12,936 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-12 10:13:12,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 548 transitions, 1200 flow. Second operand has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:12,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:12,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-12 10:13:12,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:15,794 INFO L129 PetriNetUnfolder]: 3458/16435 cut-off events. [2022-07-12 10:13:15,794 INFO L130 PetriNetUnfolder]: For 536/538 co-relation queries the response was YES. [2022-07-12 10:13:15,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22739 conditions, 16435 events. 3458/16435 cut-off events. For 536/538 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 170190 event pairs, 1671 based on Foata normal form. 0/14790 useless extension candidates. Maximal degree in co-relation 22725. Up to 4595 conditions per place. [2022-07-12 10:13:15,886 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 264 selfloop transitions, 24 changer transitions 0/686 dead transitions. [2022-07-12 10:13:15,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 686 transitions, 2072 flow [2022-07-12 10:13:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:13:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:13:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6625 transitions. [2022-07-12 10:13:15,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7126721170395869 [2022-07-12 10:13:15,902 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6625 transitions. [2022-07-12 10:13:15,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6625 transitions. [2022-07-12 10:13:15,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:15,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6625 transitions. [2022-07-12 10:13:15,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 414.0625) internal successors, (6625), 16 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:15,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:15,937 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:15,937 INFO L186 Difference]: Start difference. First operand has 533 places, 548 transitions, 1200 flow. Second operand 16 states and 6625 transitions. [2022-07-12 10:13:15,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 686 transitions, 2072 flow [2022-07-12 10:13:15,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 686 transitions, 2068 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:13:15,954 INFO L242 Difference]: Finished difference. Result has 550 places, 554 transitions, 1288 flow [2022-07-12 10:13:15,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1288, PETRI_PLACES=550, PETRI_TRANSITIONS=554} [2022-07-12 10:13:15,957 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 36 predicate places. [2022-07-12 10:13:15,957 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 554 transitions, 1288 flow [2022-07-12 10:13:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:15,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:15,961 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:13:15,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:13:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1091126161, now seen corresponding path program 1 times [2022-07-12 10:13:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:15,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903634918] [2022-07-12 10:13:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:13:16,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903634918] [2022-07-12 10:13:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903634918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304895725] [2022-07-12 10:13:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:16,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:16,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:13:16,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:13:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 10:13:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:17,202 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:13:17,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:13:17,281 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:13:17,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:13:17,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:17,939 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:13:17,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:13:18,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:13:18,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-12 10:13:18,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-12 10:13:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:13:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:18,620 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-12 10:13:18,680 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_660) |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-12 10:13:20,147 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 10:13:20,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9534 treesize of output 9364 [2022-07-12 10:13:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:13:20,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6674 treesize of output 6578 [2022-07-12 10:13:20,727 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 10:13:20,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8892 treesize of output 8508 [2022-07-12 10:13:20,790 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 10:13:20,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8508 treesize of output 7740 [2022-07-12 10:13:20,851 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 10:13:20,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7740 treesize of output 7548 [2022-07-12 10:14:53,979 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:14:53,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 220 treesize of output 372 [2022-07-12 10:14:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:14:54,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304895725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:14:54,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:14:54,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-12 10:14:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247072231] [2022-07-12 10:14:54,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:14:54,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 10:14:54,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 10:14:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2090, Unknown=47, NotChecked=198, Total=2756 [2022-07-12 10:14:54,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-12 10:14:54,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 554 transitions, 1288 flow. Second operand has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:14:54,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:54,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-12 10:14:54,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:00,567 INFO L129 PetriNetUnfolder]: 6657/31137 cut-off events. [2022-07-12 10:15:00,567 INFO L130 PetriNetUnfolder]: For 2895/2895 co-relation queries the response was YES. [2022-07-12 10:15:00,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44322 conditions, 31137 events. 6657/31137 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 372694 event pairs, 3476 based on Foata normal form. 67/28300 useless extension candidates. Maximal degree in co-relation 44304. Up to 5045 conditions per place. [2022-07-12 10:15:00,861 INFO L132 encePairwiseOnDemand]: 547/581 looper letters, 574 selfloop transitions, 95 changer transitions 0/1067 dead transitions. [2022-07-12 10:15:00,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1067 transitions, 3779 flow [2022-07-12 10:15:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:15:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-12 10:15:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 12944 transitions. [2022-07-12 10:15:00,887 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718671922713897 [2022-07-12 10:15:00,887 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 12944 transitions. [2022-07-12 10:15:00,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 12944 transitions. [2022-07-12 10:15:00,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:00,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 12944 transitions. [2022-07-12 10:15:00,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 417.5483870967742) internal successors, (12944), 31 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:00,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:00,950 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:00,950 INFO L186 Difference]: Start difference. First operand has 550 places, 554 transitions, 1288 flow. Second operand 31 states and 12944 transitions. [2022-07-12 10:15:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1067 transitions, 3779 flow [2022-07-12 10:15:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1067 transitions, 3738 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-12 10:15:00,977 INFO L242 Difference]: Finished difference. Result has 581 places, 624 transitions, 1928 flow [2022-07-12 10:15:00,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1928, PETRI_PLACES=581, PETRI_TRANSITIONS=624} [2022-07-12 10:15:00,979 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 67 predicate places. [2022-07-12 10:15:00,979 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 624 transitions, 1928 flow [2022-07-12 10:15:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:00,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:00,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:01,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:15:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:01,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-12 10:15:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 604174216, now seen corresponding path program 1 times [2022-07-12 10:15:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605989981] [2022-07-12 10:15:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:15:01,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:01,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605989981] [2022-07-12 10:15:01,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605989981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:15:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558818032] [2022-07-12 10:15:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:01,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:01,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:01,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:15:01,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:15:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:15:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:15:02,109 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 10:15:02,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 10:15:02,167 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 10:15:02,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 10:15:02,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,665 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:15:02,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 10:15:02,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:15:02,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:15:02,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:15:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:15:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:15:02,894 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-12 10:15:02,934 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int)) (v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_834) |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-12 10:15:03,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8766 treesize of output 8634 [2022-07-12 10:15:03,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4155 treesize of output 4027 [2022-07-12 10:15:03,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8182 treesize of output 8118 [2022-07-12 10:15:04,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8118 treesize of output 7862 [2022-07-12 10:15:04,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7862 treesize of output 7350