./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 35987657 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-?-3598765 [2022-07-21 08:47:34,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:47:34,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:47:34,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:47:34,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:47:34,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:47:34,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:47:34,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:47:34,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:47:34,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:47:34,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:47:34,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:47:34,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:47:34,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:47:34,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:47:34,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:47:34,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:47:34,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:47:34,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:47:34,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:47:34,923 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:47:34,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:47:34,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:47:34,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:47:34,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:47:34,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:47:34,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:47:34,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:47:34,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:47:34,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:47:34,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:47:34,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:47:34,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:47:34,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:47:34,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:47:34,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:47:34,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:47:34,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:47:34,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:47:34,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:47:34,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:47:34,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:47:34,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:47:34,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:47:34,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:47:34,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:47:34,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:47:34,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:47:34,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:47:34,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:47:34,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:47:34,988 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:47:34,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:47:34,989 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:47:34,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:47:34,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:47:34,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:47:34,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:47:34,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:47:34,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:47:34,996 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:47:34,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:47:34,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:47:34,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:47:34,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:47:34,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:47:34,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:47:34,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:34,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:47:34,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:47:34,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:47:34,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:47:34,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:47:34,998 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:47:34,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:47:34,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:47:34,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 [2022-07-21 08:47:35,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:47:35,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:47:35,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:47:35,322 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:47:35,323 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:47:35,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-21 08:47:35,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2680e987/8aba35df5d854391bbfa2cd5dae1c1af/FLAGd8cc5c4e4 [2022-07-21 08:47:35,853 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:47:35,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-21 08:47:35,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2680e987/8aba35df5d854391bbfa2cd5dae1c1af/FLAGd8cc5c4e4 [2022-07-21 08:47:36,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2680e987/8aba35df5d854391bbfa2cd5dae1c1af [2022-07-21 08:47:36,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:47:36,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:47:36,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:36,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:47:36,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:47:36,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a69c7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36, skipping insertion in model container [2022-07-21 08:47:36,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:47:36,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:47:36,317 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:47:36,454 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] [2022-07-21 08:47:36,471 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] [2022-07-21 08:47:36,472 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] [2022-07-21 08:47:36,473 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] [2022-07-21 08:47:36,474 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] [2022-07-21 08:47:36,475 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] [2022-07-21 08:47:36,476 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] [2022-07-21 08:47:36,477 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] [2022-07-21 08:47:36,477 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] [2022-07-21 08:47:36,478 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] [2022-07-21 08:47:36,479 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] [2022-07-21 08:47:36,486 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] [2022-07-21 08:47:36,486 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] [2022-07-21 08:47:36,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:36,494 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:47:36,503 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:47:36,520 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] [2022-07-21 08:47:36,526 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] [2022-07-21 08:47:36,527 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] [2022-07-21 08:47:36,528 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] [2022-07-21 08:47:36,529 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] [2022-07-21 08:47:36,529 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] [2022-07-21 08:47:36,530 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] [2022-07-21 08:47:36,532 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] [2022-07-21 08:47:36,532 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] [2022-07-21 08:47:36,533 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] [2022-07-21 08:47:36,534 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] [2022-07-21 08:47:36,540 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] [2022-07-21 08:47:36,541 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] [2022-07-21 08:47:36,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:36,581 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:47:36,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36 WrapperNode [2022-07-21 08:47:36,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:36,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:36,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:47:36,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:47:36,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,659 INFO L137 Inliner]: procedures = 174, calls = 78, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 521 [2022-07-21 08:47:36,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:36,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:47:36,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:47:36,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:47:36,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:47:36,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:47:36,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:47:36,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:47:36,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (1/1) ... [2022-07-21 08:47:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:36,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:36,787 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) [2022-07-21 08:47:36,790 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 [2022-07-21 08:47:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:47:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:47:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:47:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-21 08:47:36,821 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-21 08:47:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:47:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 08:47:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:47:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 08:47:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:47:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:47:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:47:36,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:47:36,824 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:47:36,947 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:47:36,948 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:47:37,644 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:47:37,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:47:37,659 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2022-07-21 08:47:37,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:37 BoogieIcfgContainer [2022-07-21 08:47:37,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:47:37,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:47:37,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:47:37,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:47:37,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:47:36" (1/3) ... [2022-07-21 08:47:37,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1314bc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:37, skipping insertion in model container [2022-07-21 08:47:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:36" (2/3) ... [2022-07-21 08:47:37,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1314bc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:37, skipping insertion in model container [2022-07-21 08:47:37,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:37" (3/3) ... [2022-07-21 08:47:37,670 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier_2t.i [2022-07-21 08:47:37,677 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:47:37,684 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:47:37,685 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-21 08:47:37,685 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:47:37,809 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:47:37,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 514 places, 581 transitions, 1170 flow [2022-07-21 08:47:38,112 INFO L129 PetriNetUnfolder]: 106/858 cut-off events. [2022-07-21 08:47:38,112 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:47:38,130 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. [2022-07-21 08:47:38,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 581 transitions, 1170 flow [2022-07-21 08:47:38,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 581 transitions, 1170 flow [2022-07-21 08:47:38,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:47:38,182 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@590200c8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38345b90 [2022-07-21 08:47:38,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-21 08:47:38,189 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-21 08:47:38,189 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:47:38,189 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:38,190 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] [2022-07-21 08:47:38,190 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)] === [2022-07-21 08:47:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 682126804, now seen corresponding path program 1 times [2022-07-21 08:47:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649867698] [2022-07-21 08:47:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:38,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649867698] [2022-07-21 08:47:38,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649867698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:38,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:38,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:47:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574210642] [2022-07-21 08:47:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:47:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:47:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:47:38,433 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 581 [2022-07-21 08:47:38,439 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) [2022-07-21 08:47:38,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:38,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 581 [2022-07-21 08:47:38,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:38,636 INFO L129 PetriNetUnfolder]: 40/792 cut-off events. [2022-07-21 08:47:38,636 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:47:38,645 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. [2022-07-21 08:47:38,650 INFO L132 encePairwiseOnDemand]: 538/581 looper letters, 2 selfloop transitions, 0 changer transitions 0/538 dead transitions. [2022-07-21 08:47:38,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 538 transitions, 1088 flow [2022-07-21 08:47:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:47:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:47:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1117 transitions. [2022-07-21 08:47:38,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9612736660929432 [2022-07-21 08:47:38,677 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1117 transitions. [2022-07-21 08:47:38,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1117 transitions. [2022-07-21 08:47:38,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:38,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1117 transitions. [2022-07-21 08:47:38,688 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) [2022-07-21 08:47:38,697 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) [2022-07-21 08:47:38,699 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) [2022-07-21 08:47:38,701 INFO L186 Difference]: Start difference. First operand has 514 places, 581 transitions, 1170 flow. Second operand 2 states and 1117 transitions. [2022-07-21 08:47:38,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 538 transitions, 1088 flow [2022-07-21 08:47:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 538 transitions, 1088 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:47:38,722 INFO L242 Difference]: Finished difference. Result has 515 places, 538 transitions, 1084 flow [2022-07-21 08:47:38,724 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} [2022-07-21 08:47:38,728 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2022-07-21 08:47:38,728 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 538 transitions, 1084 flow [2022-07-21 08:47:38,729 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) [2022-07-21 08:47:38,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:38,730 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] [2022-07-21 08:47:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:47:38,734 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)] === [2022-07-21 08:47:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1870030157, now seen corresponding path program 1 times [2022-07-21 08:47:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:38,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018529611] [2022-07-21 08:47:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:38,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018529611] [2022-07-21 08:47:38,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018529611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:38,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:38,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:47:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267337877] [2022-07-21 08:47:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:38,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:47:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:38,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:47:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:47:38,814 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-21 08:47:38,816 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) [2022-07-21 08:47:38,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:38,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-21 08:47:38,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:39,084 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-21 08:47:39,085 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:47:39,092 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. [2022-07-21 08:47:39,097 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 15 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-07-21 08:47:39,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 544 transitions, 1130 flow [2022-07-21 08:47:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:47:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:47:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1599 transitions. [2022-07-21 08:47:39,101 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173838209982789 [2022-07-21 08:47:39,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1599 transitions. [2022-07-21 08:47:39,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1599 transitions. [2022-07-21 08:47:39,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:39,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1599 transitions. [2022-07-21 08:47:39,105 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) [2022-07-21 08:47:39,108 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) [2022-07-21 08:47:39,109 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) [2022-07-21 08:47:39,110 INFO L186 Difference]: Start difference. First operand has 515 places, 538 transitions, 1084 flow. Second operand 3 states and 1599 transitions. [2022-07-21 08:47:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 544 transitions, 1130 flow [2022-07-21 08:47:39,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 544 transitions, 1130 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:47:39,119 INFO L242 Difference]: Finished difference. Result has 518 places, 539 transitions, 1096 flow [2022-07-21 08:47:39,119 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} [2022-07-21 08:47:39,120 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 4 predicate places. [2022-07-21 08:47:39,120 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 539 transitions, 1096 flow [2022-07-21 08:47:39,122 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) [2022-07-21 08:47:39,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:39,122 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] [2022-07-21 08:47:39,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:47:39,122 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)] === [2022-07-21 08:47:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1201829103, now seen corresponding path program 1 times [2022-07-21 08:47:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:39,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756610793] [2022-07-21 08:47:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756610793] [2022-07-21 08:47:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756610793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304660290] [2022-07-21 08:47:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:39,187 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) [2022-07-21 08:47:39,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:47:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:47:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:39,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304660290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:39,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:39,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-21 08:47:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766963266] [2022-07-21 08:47:39,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:39,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:47:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:47:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:47:39,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-21 08:47:39,420 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) [2022-07-21 08:47:39,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:39,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-21 08:47:39,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:39,588 INFO L129 PetriNetUnfolder]: 40/800 cut-off events. [2022-07-21 08:47:39,589 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-21 08:47:39,598 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. [2022-07-21 08:47:39,603 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 14 selfloop transitions, 4 changer transitions 0/545 dead transitions. [2022-07-21 08:47:39,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 545 transitions, 1144 flow [2022-07-21 08:47:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:47:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:47:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-21 08:47:39,609 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-21 08:47:39,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-21 08:47:39,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-21 08:47:39,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:39,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-21 08:47:39,615 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) [2022-07-21 08:47:39,619 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) [2022-07-21 08:47:39,621 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) [2022-07-21 08:47:39,621 INFO L186 Difference]: Start difference. First operand has 518 places, 539 transitions, 1096 flow. Second operand 4 states and 2127 transitions. [2022-07-21 08:47:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 545 transitions, 1144 flow [2022-07-21 08:47:39,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 545 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:39,631 INFO L242 Difference]: Finished difference. Result has 522 places, 540 transitions, 1114 flow [2022-07-21 08:47:39,632 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} [2022-07-21 08:47:39,634 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-21 08:47:39,634 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 540 transitions, 1114 flow [2022-07-21 08:47:39,636 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) [2022-07-21 08:47:39,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:39,637 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] [2022-07-21 08:47:39,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:39,847 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 [2022-07-21 08:47:39,848 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)] === [2022-07-21 08:47:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -24715469, now seen corresponding path program 2 times [2022-07-21 08:47:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:39,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903931120] [2022-07-21 08:47:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:39,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903931120] [2022-07-21 08:47:39,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903931120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:39,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:39,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:47:39,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178196489] [2022-07-21 08:47:39,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:39,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:47:39,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:47:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:47:39,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 581 [2022-07-21 08:47:39,951 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) [2022-07-21 08:47:39,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:39,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 581 [2022-07-21 08:47:39,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:40,131 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-21 08:47:40,131 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-21 08:47:40,141 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. [2022-07-21 08:47:40,146 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 5 selfloop transitions, 2 changer transitions 0/538 dead transitions. [2022-07-21 08:47:40,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 538 transitions, 1124 flow [2022-07-21 08:47:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:47:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:47:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2128 transitions. [2022-07-21 08:47:40,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9156626506024096 [2022-07-21 08:47:40,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2128 transitions. [2022-07-21 08:47:40,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2128 transitions. [2022-07-21 08:47:40,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:40,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2128 transitions. [2022-07-21 08:47:40,156 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) [2022-07-21 08:47:40,160 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) [2022-07-21 08:47:40,161 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) [2022-07-21 08:47:40,161 INFO L186 Difference]: Start difference. First operand has 522 places, 540 transitions, 1114 flow. Second operand 4 states and 2128 transitions. [2022-07-21 08:47:40,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 538 transitions, 1124 flow [2022-07-21 08:47:40,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 538 transitions, 1120 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:40,171 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1110 flow [2022-07-21 08:47:40,172 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} [2022-07-21 08:47:40,173 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-21 08:47:40,173 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1110 flow [2022-07-21 08:47:40,174 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) [2022-07-21 08:47:40,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:40,175 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] [2022-07-21 08:47:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:47:40,175 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)] === [2022-07-21 08:47:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1817996092, now seen corresponding path program 1 times [2022-07-21 08:47:40,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631631136] [2022-07-21 08:47:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:40,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:40,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631631136] [2022-07-21 08:47:40,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631631136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:40,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435665053] [2022-07-21 08:47:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:40,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:40,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:40,254 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) [2022-07-21 08:47:40,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:47:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 08:47:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:40,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:47:40,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435665053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:40,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:47:40,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-21 08:47:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209957207] [2022-07-21 08:47:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:40,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:47:40,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:47:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:47:40,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-21 08:47:40,464 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) [2022-07-21 08:47:40,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:40,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-21 08:47:40,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:40,606 INFO L129 PetriNetUnfolder]: 40/793 cut-off events. [2022-07-21 08:47:40,607 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:47:40,618 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. [2022-07-21 08:47:40,623 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 7 selfloop transitions, 3 changer transitions 0/538 dead transitions. [2022-07-21 08:47:40,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 538 transitions, 1128 flow [2022-07-21 08:47:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:47:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:47:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-21 08:47:40,628 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-21 08:47:40,628 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-21 08:47:40,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-21 08:47:40,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:40,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-21 08:47:40,634 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) [2022-07-21 08:47:40,638 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) [2022-07-21 08:47:40,639 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) [2022-07-21 08:47:40,640 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1110 flow. Second operand 4 states and 2127 transitions. [2022-07-21 08:47:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 538 transitions, 1128 flow [2022-07-21 08:47:40,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 538 transitions, 1121 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:47:40,650 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1116 flow [2022-07-21 08:47:40,650 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} [2022-07-21 08:47:40,652 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-21 08:47:40,653 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1116 flow [2022-07-21 08:47:40,654 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) [2022-07-21 08:47:40,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:40,655 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] [2022-07-21 08:47:40,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:40,867 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 [2022-07-21 08:47:40,868 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)] === [2022-07-21 08:47:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1162500929, now seen corresponding path program 1 times [2022-07-21 08:47:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327878736] [2022-07-21 08:47:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:40,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327878736] [2022-07-21 08:47:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327878736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:41,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:41,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-21 08:47:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708183049] [2022-07-21 08:47:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 08:47:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 08:47:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-21 08:47:41,648 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-21 08:47:41,655 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) [2022-07-21 08:47:41,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:41,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-21 08:47:41,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:44,672 INFO L129 PetriNetUnfolder]: 3485/15852 cut-off events. [2022-07-21 08:47:44,673 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:47:44,726 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. [2022-07-21 08:47:44,775 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 265 selfloop transitions, 21 changer transitions 0/682 dead transitions. [2022-07-21 08:47:44,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 682 transitions, 1976 flow [2022-07-21 08:47:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:47:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:47:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 6230 transitions. [2022-07-21 08:47:44,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.714859437751004 [2022-07-21 08:47:44,789 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 6230 transitions. [2022-07-21 08:47:44,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 6230 transitions. [2022-07-21 08:47:44,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:44,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 6230 transitions. [2022-07-21 08:47:44,804 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) [2022-07-21 08:47:44,817 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) [2022-07-21 08:47:44,819 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) [2022-07-21 08:47:44,819 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1116 flow. Second operand 15 states and 6230 transitions. [2022-07-21 08:47:44,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 682 transitions, 1976 flow [2022-07-21 08:47:44,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 682 transitions, 1975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:44,832 INFO L242 Difference]: Finished difference. Result has 540 places, 549 transitions, 1221 flow [2022-07-21 08:47:44,833 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} [2022-07-21 08:47:44,834 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 26 predicate places. [2022-07-21 08:47:44,834 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 549 transitions, 1221 flow [2022-07-21 08:47:44,836 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) [2022-07-21 08:47:44,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:44,837 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] [2022-07-21 08:47:44,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:47:44,837 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)] === [2022-07-21 08:47:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1614772030, now seen corresponding path program 1 times [2022-07-21 08:47:44,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:44,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355710478] [2022-07-21 08:47:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:44,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:44,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355710478] [2022-07-21 08:47:44,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355710478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:44,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:44,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:47:44,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544294543] [2022-07-21 08:47:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:44,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:47:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:44,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:47:44,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:47:44,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-21 08:47:44,896 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) [2022-07-21 08:47:44,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:44,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-21 08:47:44,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:45,182 INFO L129 PetriNetUnfolder]: 89/1606 cut-off events. [2022-07-21 08:47:45,182 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-21 08:47:45,194 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. [2022-07-21 08:47:45,199 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 7 selfloop transitions, 2 changer transitions 0/548 dead transitions. [2022-07-21 08:47:45,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 548 transitions, 1233 flow [2022-07-21 08:47:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:47:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:47:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1597 transitions. [2022-07-21 08:47:45,203 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9162363740676994 [2022-07-21 08:47:45,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1597 transitions. [2022-07-21 08:47:45,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1597 transitions. [2022-07-21 08:47:45,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:45,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1597 transitions. [2022-07-21 08:47:45,207 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) [2022-07-21 08:47:45,210 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) [2022-07-21 08:47:45,210 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) [2022-07-21 08:47:45,210 INFO L186 Difference]: Start difference. First operand has 540 places, 549 transitions, 1221 flow. Second operand 3 states and 1597 transitions. [2022-07-21 08:47:45,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 548 transitions, 1233 flow [2022-07-21 08:47:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 548 transitions, 1214 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-21 08:47:45,224 INFO L242 Difference]: Finished difference. Result has 533 places, 548 transitions, 1200 flow [2022-07-21 08:47:45,225 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} [2022-07-21 08:47:45,226 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 19 predicate places. [2022-07-21 08:47:45,226 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 548 transitions, 1200 flow [2022-07-21 08:47:45,226 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) [2022-07-21 08:47:45,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:45,227 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] [2022-07-21 08:47:45,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:47:45,227 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)] === [2022-07-21 08:47:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1746328945, now seen corresponding path program 1 times [2022-07-21 08:47:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774687256] [2022-07-21 08:47:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774687256] [2022-07-21 08:47:45,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774687256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:45,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:45,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 08:47:45,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94370104] [2022-07-21 08:47:45,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:47:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:47:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:47:46,002 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-21 08:47:46,008 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) [2022-07-21 08:47:46,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:46,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-21 08:47:46,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:48,731 INFO L129 PetriNetUnfolder]: 3458/16435 cut-off events. [2022-07-21 08:47:48,731 INFO L130 PetriNetUnfolder]: For 536/538 co-relation queries the response was YES. [2022-07-21 08:47:48,780 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. [2022-07-21 08:47:48,828 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 264 selfloop transitions, 24 changer transitions 0/686 dead transitions. [2022-07-21 08:47:48,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 686 transitions, 2072 flow [2022-07-21 08:47:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 08:47:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 08:47:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6625 transitions. [2022-07-21 08:47:48,843 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7126721170395869 [2022-07-21 08:47:48,843 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6625 transitions. [2022-07-21 08:47:48,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6625 transitions. [2022-07-21 08:47:48,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:48,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6625 transitions. [2022-07-21 08:47:48,859 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) [2022-07-21 08:47:48,873 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) [2022-07-21 08:47:48,875 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) [2022-07-21 08:47:48,875 INFO L186 Difference]: Start difference. First operand has 533 places, 548 transitions, 1200 flow. Second operand 16 states and 6625 transitions. [2022-07-21 08:47:48,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 686 transitions, 2072 flow [2022-07-21 08:47:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 686 transitions, 2068 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:47:48,890 INFO L242 Difference]: Finished difference. Result has 550 places, 554 transitions, 1288 flow [2022-07-21 08:47:48,891 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} [2022-07-21 08:47:48,892 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 36 predicate places. [2022-07-21 08:47:48,892 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 554 transitions, 1288 flow [2022-07-21 08:47:48,894 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) [2022-07-21 08:47:48,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:48,895 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] [2022-07-21 08:47:48,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:47:48,895 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)] === [2022-07-21 08:47:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1091126161, now seen corresponding path program 1 times [2022-07-21 08:47:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623933192] [2022-07-21 08:47:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:47:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623933192] [2022-07-21 08:47:49,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623933192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894735304] [2022-07-21 08:47:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:49,732 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) [2022-07-21 08:47:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:47:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 08:47:49,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:50,222 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 08:47:50,223 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 [2022-07-21 08:47:50,297 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 08:47:50,297 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 [2022-07-21 08:47:50,384 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 [2022-07-21 08:47:50,411 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 [2022-07-21 08:47:50,430 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 [2022-07-21 08:47:50,507 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 [2022-07-21 08:47:50,531 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 [2022-07-21 08:47:50,552 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 23 treesize of output 23 [2022-07-21 08:47:50,765 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 [2022-07-21 08:47:50,796 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 [2022-07-21 08:47:50,816 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 [2022-07-21 08:47:50,837 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 [2022-07-21 08:47:50,880 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 08:47:50,880 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 [2022-07-21 08:47:50,951 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 [2022-07-21 08:47:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 08:47:51,047 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 [2022-07-21 08:47:51,276 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 [2022-07-21 08:47:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:47:51,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:51,453 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 [2022-07-21 08:47:51,513 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 [2022-07-21 08:47:53,221 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 08:47:53,222 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 [2022-07-21 08:47:53,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 08:47:53,703 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 [2022-07-21 08:47:53,778 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 08:47:53,780 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 [2022-07-21 08:47:53,861 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 08:47:53,862 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 [2022-07-21 08:47:53,943 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 08:47:53,944 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 [2022-07-21 08:49:37,139 INFO L356 Elim1Store]: treesize reduction 31, result has 36.7 percent of original size [2022-07-21 08:49:37,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 146 [2022-07-21 08:49:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:49:37,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894735304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:49:37,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:49:37,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-21 08:49:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525869615] [2022-07-21 08:49:37,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:49:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 08:49:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:49:37,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 08:49:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2090, Unknown=47, NotChecked=198, Total=2756 [2022-07-21 08:49:37,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-21 08:49:37,246 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) [2022-07-21 08:49:37,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:49:37,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-21 08:49:37,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:49:42,929 INFO L129 PetriNetUnfolder]: 6657/31137 cut-off events. [2022-07-21 08:49:42,929 INFO L130 PetriNetUnfolder]: For 2895/2895 co-relation queries the response was YES. [2022-07-21 08:49:43,072 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. [2022-07-21 08:49:43,176 INFO L132 encePairwiseOnDemand]: 547/581 looper letters, 574 selfloop transitions, 95 changer transitions 0/1067 dead transitions. [2022-07-21 08:49:43,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1067 transitions, 3779 flow [2022-07-21 08:49:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 08:49:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-21 08:49:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 12944 transitions. [2022-07-21 08:49:43,203 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718671922713897 [2022-07-21 08:49:43,203 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 12944 transitions. [2022-07-21 08:49:43,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 12944 transitions. [2022-07-21 08:49:43,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:49:43,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 12944 transitions. [2022-07-21 08:49:43,230 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) [2022-07-21 08:49:43,258 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) [2022-07-21 08:49:43,263 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) [2022-07-21 08:49:43,264 INFO L186 Difference]: Start difference. First operand has 550 places, 554 transitions, 1288 flow. Second operand 31 states and 12944 transitions. [2022-07-21 08:49:43,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1067 transitions, 3779 flow [2022-07-21 08:49:43,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1067 transitions, 3738 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-21 08:49:43,292 INFO L242 Difference]: Finished difference. Result has 581 places, 624 transitions, 1928 flow [2022-07-21 08:49:43,293 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} [2022-07-21 08:49:43,294 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 67 predicate places. [2022-07-21 08:49:43,294 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 624 transitions, 1928 flow [2022-07-21 08:49:43,300 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) [2022-07-21 08:49:43,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:49:43,300 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] [2022-07-21 08:49:43,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:49:43,524 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 [2022-07-21 08:49:43,524 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)] === [2022-07-21 08:49:43,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:49:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 604174216, now seen corresponding path program 1 times [2022-07-21 08:49:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:49:43,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108859707] [2022-07-21 08:49:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:49:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:49:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:49:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 08:49:44,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:49:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108859707] [2022-07-21 08:49:44,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108859707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:49:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213240984] [2022-07-21 08:49:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:49:44,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:49:44,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:49:44,131 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) [2022-07-21 08:49:44,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:49:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:49:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 08:49:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:49:44,478 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 08:49:44,478 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 [2022-07-21 08:49:44,537 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 08:49:44,537 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 [2022-07-21 08:49:44,609 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 [2022-07-21 08:49:44,624 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 [2022-07-21 08:49:44,641 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 [2022-07-21 08:49:44,708 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 [2022-07-21 08:49:44,736 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 [2022-07-21 08:49:44,759 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 [2022-07-21 08:49:44,919 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 [2022-07-21 08:49:44,929 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 [2022-07-21 08:49:44,947 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 [2022-07-21 08:49:44,966 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 [2022-07-21 08:49:45,053 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 08:49:45,054 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 [2022-07-21 08:49:45,126 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 [2022-07-21 08:49:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 08:49:45,262 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 [2022-07-21 08:49:45,284 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 [2022-07-21 08:49:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 08:49:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:49:45,331 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 [2022-07-21 08:49:45,360 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 [2022-07-21 08:49:46,118 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 [2022-07-21 08:49:46,348 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 [2022-07-21 08:49:46,398 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 7670 [2022-07-21 08:49:46,449 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 7670 treesize of output 7414 [2022-07-21 08:49:46,496 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 7414 treesize of output 7350