./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:49:12,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:49:12,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:49:12,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:49:12,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:49:12,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:49:12,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:49:12,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:49:12,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:49:12,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:49:12,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:49:12,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:49:12,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:49:12,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:49:12,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:49:12,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:49:12,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:49:12,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:49:12,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:49:12,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:49:12,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:49:12,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:49:12,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:49:12,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:49:12,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:49:12,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:49:12,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:49:12,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:49:12,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:49:12,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:49:12,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:49:12,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:49:12,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:49:12,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:49:12,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:49:12,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:49:12,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:49:12,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:49:12,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:49:12,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:49:12,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:49:12,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:49:12,544 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:49:12,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:49:12,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:49:12,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:49:12,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:49:12,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:49:12,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:49:12,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:49:12,548 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:49:12,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:49:12,549 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:49:12,549 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:49:12,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:49:12,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:49:12,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:49:12,551 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:49:12,551 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:49:12,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:49:12,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:49:12,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:49:12,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:49:12,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:49:12,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:49:12,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:49:12,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:49:12,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:49:12,553 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:49:12,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:49:12,553 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:49:12,553 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:49:12,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:49:12,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:49:12,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:49:12,868 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:49:12,868 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:49:12,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-09-01 02:49:14,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:49:14,343 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:49:14,343 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-09-01 02:49:14,351 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac337155a/17a3cd48621b4ff89192df30700e2aab/FLAGa3d675509 [2023-09-01 02:49:14,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac337155a/17a3cd48621b4ff89192df30700e2aab [2023-09-01 02:49:14,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:49:14,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:49:14,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:49:14,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:49:14,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:49:14,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:49:14" (1/1) ... [2023-09-01 02:49:14,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c34ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:14, skipping insertion in model container [2023-09-01 02:49:14,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:49:14" (1/1) ... [2023-09-01 02:49:14,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:49:14,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:49:14,624 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-09-01 02:49:14,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:49:14,648 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:49:14,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54b5783f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:14, skipping insertion in model container [2023-09-01 02:49:14,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:49:14,651 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:49:14,653 INFO L158 Benchmark]: Toolchain (without parser) took 284.95ms. Allocated memory is still 71.3MB. Free memory was 38.2MB in the beginning and 49.1MB in the end (delta: -10.9MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2023-09-01 02:49:14,654 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 48.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:49:14,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.11ms. Allocated memory is still 71.3MB. Free memory was 38.0MB in the beginning and 49.1MB in the end (delta: -11.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2023-09-01 02:49:14,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 48.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.11ms. Allocated memory is still 71.3MB. Free memory was 38.0MB in the beginning and 49.1MB in the end (delta: -11.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:49:16,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:49:16,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:49:16,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:49:16,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:49:16,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:49:16,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:49:16,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:49:16,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:49:16,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:49:16,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:49:16,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:49:16,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:49:16,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:49:16,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:49:16,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:49:16,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:49:16,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:49:16,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:49:16,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:49:16,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:49:16,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:49:16,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:49:16,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:49:16,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:49:16,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:49:16,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:49:16,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:49:16,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:49:16,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:49:16,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:49:16,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:49:16,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:49:16,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:49:16,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:49:16,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:49:16,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:49:16,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:49:16,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:49:16,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:49:16,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:49:16,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:49:16,472 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:49:16,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:49:16,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:49:16,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:49:16,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:49:16,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:49:16,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:49:16,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:49:16,475 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:49:16,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:49:16,475 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:49:16,475 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:49:16,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:49:16,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:49:16,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:49:16,476 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:49:16,476 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:49:16,476 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:49:16,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:49:16,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:49:16,479 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:49:16,479 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:49:16,479 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:49:16,479 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:49:16,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:49:16,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:49:16,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:49:16,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:49:16,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:49:16,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:49:16,481 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:49:16,481 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:49:16,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:49:16,482 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:49:16,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:49:16,482 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:49:16,483 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:49:16,483 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:49:16,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:49:16,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:49:16,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:49:16,818 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:49:16,819 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:49:16,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-09-01 02:49:18,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:49:18,236 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:49:18,237 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c [2023-09-01 02:49:18,242 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424e17c6b/ee6e0d92893840f4bd5dc6d240b8fb89/FLAG357d4ae57 [2023-09-01 02:49:18,254 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424e17c6b/ee6e0d92893840f4bd5dc6d240b8fb89 [2023-09-01 02:49:18,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:49:18,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:49:18,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:49:18,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:49:18,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:49:18,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528e5165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18, skipping insertion in model container [2023-09-01 02:49:18,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:49:18,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:49:18,452 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-09-01 02:49:18,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:49:18,476 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:49:18,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:49:18,506 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-09-01 02:49:18,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:49:18,514 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:49:18,537 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-1.wvr.c[4604,4617] [2023-09-01 02:49:18,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:49:18,554 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:49:18,557 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:49:18,562 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:49:18,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18 WrapperNode [2023-09-01 02:49:18,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:49:18,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:49:18,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:49:18,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:49:18,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,611 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2023-09-01 02:49:18,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:49:18,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:49:18,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:49:18,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:49:18,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:49:18,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:49:18,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:49:18,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:49:18,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (1/1) ... [2023-09-01 02:49:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:49:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:49:18,693 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) [2023-09-01 02:49:18,713 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 [2023-09-01 02:49:18,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:49:18,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:49:18,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:49:18,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:49:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:49:18,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:49:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:49:18,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:49:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:49:18,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:49:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:49:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:49:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:49:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:49:18,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:49:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:49:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:49:18,733 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:49:18,837 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:49:18,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:49:19,523 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:49:19,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:49:19,736 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 02:49:19,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:49:19 BoogieIcfgContainer [2023-09-01 02:49:19,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:49:19,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:49:19,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:49:19,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:49:19,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:49:18" (1/3) ... [2023-09-01 02:49:19,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395f9c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:49:19, skipping insertion in model container [2023-09-01 02:49:19,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:49:18" (2/3) ... [2023-09-01 02:49:19,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395f9c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:49:19, skipping insertion in model container [2023-09-01 02:49:19,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:49:19" (3/3) ... [2023-09-01 02:49:19,749 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-09-01 02:49:19,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:49:19,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-09-01 02:49:19,766 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:49:19,879 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:49:19,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 275 transitions, 574 flow [2023-09-01 02:49:20,018 INFO L130 PetriNetUnfolder]: 19/272 cut-off events. [2023-09-01 02:49:20,019 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:49:20,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 19/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-09-01 02:49:20,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 275 transitions, 574 flow [2023-09-01 02:49:20,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 268 transitions, 554 flow [2023-09-01 02:49:20,043 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:49:20,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 268 transitions, 554 flow [2023-09-01 02:49:20,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 268 transitions, 554 flow [2023-09-01 02:49:20,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 268 transitions, 554 flow [2023-09-01 02:49:20,131 INFO L130 PetriNetUnfolder]: 19/268 cut-off events. [2023-09-01 02:49:20,131 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:49:20,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 19/268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 278 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-09-01 02:49:20,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-09-01 02:49:48,642 INFO L134 LiptonReduction]: Checked pairs total: 10449 [2023-09-01 02:49:48,642 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-09-01 02:49:48,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:49:48,659 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44863c8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:49:48,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-09-01 02:49:48,662 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:49:48,662 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:49:48,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:48,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:48,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:49:48,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 43202, now seen corresponding path program 1 times [2023-09-01 02:49:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685762932] [2023-09-01 02:49:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:48,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:48,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:48,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:48,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:49:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:49:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:48,931 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:49:48,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:49:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:48,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:48,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:48,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685762932] [2023-09-01 02:49:48,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685762932] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:48,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:48,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590489419] [2023-09-01 02:49:48,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:48,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:49,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-09-01 02:49:49,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-09-01 02:49:49,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:49,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-09-01 02:49:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:51,133 INFO L130 PetriNetUnfolder]: 8211/11410 cut-off events. [2023-09-01 02:49:51,133 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 02:49:51,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23092 conditions, 11410 events. 8211/11410 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 59793 event pairs, 7140 based on Foata normal form. 0/3556 useless extension candidates. Maximal degree in co-relation 21710. Up to 11410 conditions per place. [2023-09-01 02:49:51,203 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-09-01 02:49:51,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 262 flow [2023-09-01 02:49:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-09-01 02:49:51,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42289442467378413 [2023-09-01 02:49:51,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-09-01 02:49:51,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-09-01 02:49:51,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:51,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-09-01 02:49:51,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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) [2023-09-01 02:49:51,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:49:51,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:49:51,249 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 148 flow. Second operand 3 states and 713 transitions. [2023-09-01 02:49:51,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 262 flow [2023-09-01 02:49:51,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:49:51,262 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 130 flow [2023-09-01 02:49:51,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-09-01 02:49:51,272 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-09-01 02:49:51,272 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 130 flow [2023-09-01 02:49:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-09-01 02:49:51,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:51,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:49:51,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:51,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:49:51,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash 43201, now seen corresponding path program 1 times [2023-09-01 02:49:51,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:51,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597171521] [2023-09-01 02:49:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:51,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:51,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:51,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:51,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:49:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:49:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:51,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:49:51,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:49:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:51,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:49:51,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597171521] [2023-09-01 02:49:51,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597171521] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:49:51,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:49:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:49:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146602657] [2023-09-01 02:49:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:49:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:49:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:49:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:49:51,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 562 [2023-09-01 02:49:51,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-09-01 02:49:51,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:51,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 562 [2023-09-01 02:49:51,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:49:54,929 INFO L130 PetriNetUnfolder]: 16421/22816 cut-off events. [2023-09-01 02:49:54,929 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-09-01 02:49:54,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 22816 events. 16421/22816 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 132587 event pairs, 14280 based on Foata normal form. 0/7111 useless extension candidates. Maximal degree in co-relation 45840. Up to 11411 conditions per place. [2023-09-01 02:49:55,048 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 112 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-09-01 02:49:55,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 486 flow [2023-09-01 02:49:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:49:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:49:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-09-01 02:49:55,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561091340450771 [2023-09-01 02:49:55,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-09-01 02:49:55,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-09-01 02:49:55,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:49:55,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-09-01 02:49:55,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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) [2023-09-01 02:49:55,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:49:55,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:49:55,059 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 130 flow. Second operand 3 states and 769 transitions. [2023-09-01 02:49:55,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 486 flow [2023-09-01 02:49:55,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 118 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:49:55,063 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 179 flow [2023-09-01 02:49:55,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-09-01 02:49:55,064 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2023-09-01 02:49:55,064 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 179 flow [2023-09-01 02:49:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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) [2023-09-01 02:49:55,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:49:55,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:49:55,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 02:49:55,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:55,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:49:55,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:49:55,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1342659, now seen corresponding path program 1 times [2023-09-01 02:49:55,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:49:55,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875707327] [2023-09-01 02:49:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:49:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:49:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:49:55,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:49:55,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:49:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:49:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:49:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:49:55,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:49:55,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:49:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:55,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:49:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:49:55,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:49:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875707327] [2023-09-01 02:49:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875707327] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:49:55,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:49:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:49:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055058066] [2023-09-01 02:49:55,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:49:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:49:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:49:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:49:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:49:56,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-09-01 02:49:56,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 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) [2023-09-01 02:49:56,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:49:56,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-09-01 02:49:56,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:01,507 INFO L130 PetriNetUnfolder]: 24641/34238 cut-off events. [2023-09-01 02:50:01,508 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2023-09-01 02:50:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68837 conditions, 34238 events. 24641/34238 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 1927. Compared 206499 event pairs, 21420 based on Foata normal form. 0/10687 useless extension candidates. Maximal degree in co-relation 68828. Up to 11412 conditions per place. [2023-09-01 02:50:01,717 INFO L137 encePairwiseOnDemand]: 550/562 looper letters, 164 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2023-09-01 02:50:01,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 865 flow [2023-09-01 02:50:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:50:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:50:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1406 transitions. [2023-09-01 02:50:01,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169632265717675 [2023-09-01 02:50:01,722 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1406 transitions. [2023-09-01 02:50:01,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1406 transitions. [2023-09-01 02:50:01,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:01,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1406 transitions. [2023-09-01 02:50:01,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 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) [2023-09-01 02:50:01,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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) [2023-09-01 02:50:01,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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) [2023-09-01 02:50:01,736 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 179 flow. Second operand 6 states and 1406 transitions. [2023-09-01 02:50:01,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 865 flow [2023-09-01 02:50:01,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 841 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:50:01,742 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 371 flow [2023-09-01 02:50:01,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-09-01 02:50:01,744 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2023-09-01 02:50:01,744 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 371 flow [2023-09-01 02:50:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 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) [2023-09-01 02:50:01,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:01,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:50:01,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:01,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:01,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:01,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 41679634, now seen corresponding path program 1 times [2023-09-01 02:50:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353339918] [2023-09-01 02:50:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:01,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:01,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:50:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:50:02,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,175 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 02:50:02,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 02:50:02,207 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:50:02,208 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-09-01 02:50:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:50:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:02,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:50:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:02,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:02,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:02,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353339918] [2023-09-01 02:50:02,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353339918] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:02,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863956750] [2023-09-01 02:50:02,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-09-01 02:50:02,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-09-01 02:50:02,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:02,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-09-01 02:50:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:05,675 INFO L130 PetriNetUnfolder]: 18906/26589 cut-off events. [2023-09-01 02:50:05,676 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2023-09-01 02:50:05,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53601 conditions, 26589 events. 18906/26589 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 161101 event pairs, 16380 based on Foata normal form. 0/9008 useless extension candidates. Maximal degree in co-relation 53588. Up to 26589 conditions per place. [2023-09-01 02:50:05,801 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 82 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-09-01 02:50:05,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 517 flow [2023-09-01 02:50:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-09-01 02:50:05,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43297746144721233 [2023-09-01 02:50:05,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-09-01 02:50:05,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-09-01 02:50:05,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:05,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-09-01 02:50:05,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 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) [2023-09-01 02:50:05,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:05,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:05,811 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 371 flow. Second operand 3 states and 730 transitions. [2023-09-01 02:50:05,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 517 flow [2023-09-01 02:50:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 487 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:05,815 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 323 flow [2023-09-01 02:50:05,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-09-01 02:50:05,818 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-09-01 02:50:05,820 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 323 flow [2023-09-01 02:50:05,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-09-01 02:50:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:05,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:50:05,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:06,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:06,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:06,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash 41679636, now seen corresponding path program 1 times [2023-09-01 02:50:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:06,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941937966] [2023-09-01 02:50:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:06,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:06,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:06,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:50:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:50:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:06,282 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 02:50:06,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 02:50:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:06,545 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 02:50:06,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 02:50:06,847 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 02:50:06,848 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 02:50:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:07,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:07,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941937966] [2023-09-01 02:50:07,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941937966] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:07,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:07,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682168737] [2023-09-01 02:50:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:07,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-09-01 02:50:07,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-09-01 02:50:07,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:07,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-09-01 02:50:07,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:09,843 INFO L130 PetriNetUnfolder]: 13171/18940 cut-off events. [2023-09-01 02:50:09,843 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-09-01 02:50:09,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 18940 events. 13171/18940 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 114299 event pairs, 11340 based on Foata normal form. 0/7328 useless extension candidates. Maximal degree in co-relation 38263. Up to 18940 conditions per place. [2023-09-01 02:50:09,923 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-09-01 02:50:09,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 461 flow [2023-09-01 02:50:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-09-01 02:50:09,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431791221826809 [2023-09-01 02:50:09,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-09-01 02:50:09,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-09-01 02:50:09,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:09,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-09-01 02:50:09,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 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) [2023-09-01 02:50:09,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:09,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:09,933 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 323 flow. Second operand 3 states and 728 transitions. [2023-09-01 02:50:09,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 461 flow [2023-09-01 02:50:09,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:09,936 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 304 flow [2023-09-01 02:50:09,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-09-01 02:50:09,937 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-09-01 02:50:09,937 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 304 flow [2023-09-01 02:50:09,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-09-01 02:50:09,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:09,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:50:09,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:10,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:10,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:10,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456870, now seen corresponding path program 1 times [2023-09-01 02:50:10,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:10,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621443243] [2023-09-01 02:50:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:10,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:10,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:10,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:50:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:50:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:10,344 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 02:50:10,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 02:50:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:10,553 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 02:50:10,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 02:50:10,694 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 02:50:10,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 02:50:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:10,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:10,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:10,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621443243] [2023-09-01 02:50:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621443243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:10,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53171134] [2023-09-01 02:50:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:11,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-09-01 02:50:11,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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) [2023-09-01 02:50:11,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:11,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-09-01 02:50:11,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:13,180 INFO L130 PetriNetUnfolder]: 12838/18421 cut-off events. [2023-09-01 02:50:13,180 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-09-01 02:50:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37240 conditions, 18421 events. 12838/18421 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 110448 event pairs, 11052 based on Foata normal form. 0/7232 useless extension candidates. Maximal degree in co-relation 37225. Up to 18421 conditions per place. [2023-09-01 02:50:13,257 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-09-01 02:50:13,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 454 flow [2023-09-01 02:50:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-09-01 02:50:13,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306049822064057 [2023-09-01 02:50:13,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-09-01 02:50:13,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-09-01 02:50:13,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:13,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-09-01 02:50:13,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2023-09-01 02:50:13,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:13,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:13,265 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 304 flow. Second operand 3 states and 726 transitions. [2023-09-01 02:50:13,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 454 flow [2023-09-01 02:50:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:13,268 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 301 flow [2023-09-01 02:50:13,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2023-09-01 02:50:13,269 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-09-01 02:50:13,269 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 301 flow [2023-09-01 02:50:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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) [2023-09-01 02:50:13,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:13,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:50:13,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:13,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:13,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456871, now seen corresponding path program 1 times [2023-09-01 02:50:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347499724] [2023-09-01 02:50:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:13,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:13,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:13,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:13,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:50:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:50:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:13,672 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 02:50:13,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 02:50:13,686 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 24 [2023-09-01 02:50:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:13,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:50:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:50:13,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:50:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:13,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:13,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:13,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347499724] [2023-09-01 02:50:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347499724] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:13,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:13,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208388986] [2023-09-01 02:50:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:50:13,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:50:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:50:14,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-09-01 02:50:14,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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) [2023-09-01 02:50:14,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:14,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-09-01 02:50:14,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:15,897 INFO L130 PetriNetUnfolder]: 12505/17902 cut-off events. [2023-09-01 02:50:15,897 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-09-01 02:50:15,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36203 conditions, 17902 events. 12505/17902 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 106551 event pairs, 10764 based on Foata normal form. 0/7136 useless extension candidates. Maximal degree in co-relation 36187. Up to 17902 conditions per place. [2023-09-01 02:50:16,001 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 74 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-09-01 02:50:16,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 447 flow [2023-09-01 02:50:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-09-01 02:50:16,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294187425860024 [2023-09-01 02:50:16,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-09-01 02:50:16,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-09-01 02:50:16,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:16,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-09-01 02:50:16,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 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) [2023-09-01 02:50:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:16,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:16,012 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 301 flow. Second operand 3 states and 724 transitions. [2023-09-01 02:50:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 447 flow [2023-09-01 02:50:16,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:16,015 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 298 flow [2023-09-01 02:50:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-09-01 02:50:16,016 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2023-09-01 02:50:16,016 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 298 flow [2023-09-01 02:50:16,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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) [2023-09-01 02:50:16,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:16,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:50:16,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:16,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:16,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1399456876, now seen corresponding path program 1 times [2023-09-01 02:50:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093123729] [2023-09-01 02:50:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:16,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:16,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:16,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:16,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:50:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:50:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:16,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:16,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093123729] [2023-09-01 02:50:16,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093123729] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:16,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:16,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:50:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960023041] [2023-09-01 02:50:16,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:50:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:50:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:50:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-09-01 02:50:16,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2023-09-01 02:50:16,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:16,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-09-01 02:50:16,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:18,125 INFO L130 PetriNetUnfolder]: 13741/19798 cut-off events. [2023-09-01 02:50:18,125 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-09-01 02:50:18,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40005 conditions, 19798 events. 13741/19798 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 123880 event pairs, 4383 based on Foata normal form. 0/8084 useless extension candidates. Maximal degree in co-relation 39988. Up to 17944 conditions per place. [2023-09-01 02:50:18,243 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 97 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-09-01 02:50:18,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 552 flow [2023-09-01 02:50:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:50:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:50:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-09-01 02:50:18,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-09-01 02:50:18,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-09-01 02:50:18,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-09-01 02:50:18,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:18,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-09-01 02:50:18,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 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) [2023-09-01 02:50:18,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:18,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:50:18,249 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 298 flow. Second operand 3 states and 764 transitions. [2023-09-01 02:50:18,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 552 flow [2023-09-01 02:50:18,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 551 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:18,251 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 324 flow [2023-09-01 02:50:18,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-09-01 02:50:18,252 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-09-01 02:50:18,252 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 324 flow [2023-09-01 02:50:18,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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) [2023-09-01 02:50:18,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:18,253 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:50:18,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:18,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:18,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:18,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1347852609, now seen corresponding path program 2 times [2023-09-01 02:50:18,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:18,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659026288] [2023-09-01 02:50:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:50:18,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:18,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:18,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:50:18,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:50:18,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:50:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:50:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:18,671 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:50:18,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:50:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:50:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:19,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659026288] [2023-09-01 02:50:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659026288] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:50:19,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:50:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:50:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091048085] [2023-09-01 02:50:19,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:50:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:50:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:50:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:50:23,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-09-01 02:50:23,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 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) [2023-09-01 02:50:23,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:23,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-09-01 02:50:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:50:25,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:26,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:27,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:29,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:31,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:33,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:34,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:36,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:38,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:40,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:41,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:44,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:50:54,869 INFO L130 PetriNetUnfolder]: 45784/65950 cut-off events. [2023-09-01 02:50:54,869 INFO L131 PetriNetUnfolder]: For 5916/5916 co-relation queries the response was YES. [2023-09-01 02:50:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145479 conditions, 65950 events. 45784/65950 cut-off events. For 5916/5916 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 450596 event pairs, 38020 based on Foata normal form. 18/33434 useless extension candidates. Maximal degree in co-relation 145460. Up to 11561 conditions per place. [2023-09-01 02:50:55,214 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 468 selfloop transitions, 52 changer transitions 0/520 dead transitions. [2023-09-01 02:50:55,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 520 transitions, 2636 flow [2023-09-01 02:50:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:50:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:50:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2966 transitions. [2023-09-01 02:50:55,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979833926453143 [2023-09-01 02:50:55,222 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2966 transitions. [2023-09-01 02:50:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2966 transitions. [2023-09-01 02:50:55,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:50:55,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2966 transitions. [2023-09-01 02:50:55,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.16666666666666) internal successors, (2966), 12 states have internal predecessors, (2966), 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) [2023-09-01 02:50:55,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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) [2023-09-01 02:50:55,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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) [2023-09-01 02:50:55,240 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 324 flow. Second operand 12 states and 2966 transitions. [2023-09-01 02:50:55,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 520 transitions, 2636 flow [2023-09-01 02:50:55,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 520 transitions, 2615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:50:55,257 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 711 flow [2023-09-01 02:50:55,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=711, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2023-09-01 02:50:55,258 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-09-01 02:50:55,258 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 711 flow [2023-09-01 02:50:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 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) [2023-09-01 02:50:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:50:55,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:50:55,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:50:55,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:55,469 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:50:55,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:50:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 553320635, now seen corresponding path program 1 times [2023-09-01 02:50:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:50:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851701926] [2023-09-01 02:50:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:50:55,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:50:55,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:50:55,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:50:55,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:50:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:50:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:50:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:50:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:50:55,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:50:55,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:50:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851701926] [2023-09-01 02:50:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851701926] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:50:55,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:50:55,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:50:55,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119627313] [2023-09-01 02:50:55,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:50:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:50:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:50:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:50:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:50:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-09-01 02:50:55,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 711 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 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) [2023-09-01 02:50:55,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:50:55,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-09-01 02:50:55,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:01,383 INFO L130 PetriNetUnfolder]: 39804/57270 cut-off events. [2023-09-01 02:51:01,384 INFO L131 PetriNetUnfolder]: For 2741/2741 co-relation queries the response was YES. [2023-09-01 02:51:01,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125668 conditions, 57270 events. 39804/57270 cut-off events. For 2741/2741 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 375646 event pairs, 14150 based on Foata normal form. 0/30268 useless extension candidates. Maximal degree in co-relation 125641. Up to 48391 conditions per place. [2023-09-01 02:51:01,723 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 129 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-09-01 02:51:01,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1032 flow [2023-09-01 02:51:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-09-01 02:51:01,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513641755634638 [2023-09-01 02:51:01,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-09-01 02:51:01,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-09-01 02:51:01,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:01,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-09-01 02:51:01,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 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) [2023-09-01 02:51:01,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:01,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:01,730 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 711 flow. Second operand 3 states and 761 transitions. [2023-09-01 02:51:01,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1032 flow [2023-09-01 02:51:01,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 939 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 02:51:01,735 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 630 flow [2023-09-01 02:51:01,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2023-09-01 02:51:01,736 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2023-09-01 02:51:01,736 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 630 flow [2023-09-01 02:51:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 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) [2023-09-01 02:51:01,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:01,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:01,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:01,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:01,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:51:01,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash 553320669, now seen corresponding path program 1 times [2023-09-01 02:51:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:01,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2195149] [2023-09-01 02:51:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:01,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:01,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:01,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:51:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:51:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:02,138 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 02:51:02,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 02:51:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:02,155 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 42 [2023-09-01 02:51:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:51:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:02,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-09-01 02:51:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:02,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:02,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2195149] [2023-09-01 02:51:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2195149] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:02,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:02,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:02,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115011658] [2023-09-01 02:51:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:02,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:51:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:51:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:51:02,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 562 [2023-09-01 02:51:02,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 630 flow. Second operand has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 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) [2023-09-01 02:51:02,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:02,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 562 [2023-09-01 02:51:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:08,417 INFO L130 PetriNetUnfolder]: 39584/56830 cut-off events. [2023-09-01 02:51:08,418 INFO L131 PetriNetUnfolder]: For 5170/5170 co-relation queries the response was YES. [2023-09-01 02:51:08,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132122 conditions, 56830 events. 39584/56830 cut-off events. For 5170/5170 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 380232 event pairs, 34280 based on Foata normal form. 0/32110 useless extension candidates. Maximal degree in co-relation 132093. Up to 56830 conditions per place. [2023-09-01 02:51:08,778 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-09-01 02:51:08,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 838 flow [2023-09-01 02:51:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-09-01 02:51:08,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42823250296559906 [2023-09-01 02:51:08,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-09-01 02:51:08,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-09-01 02:51:08,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:08,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-09-01 02:51:08,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 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) [2023-09-01 02:51:08,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:08,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:08,785 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 630 flow. Second operand 3 states and 722 transitions. [2023-09-01 02:51:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 838 flow [2023-09-01 02:51:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 836 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:08,791 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 626 flow [2023-09-01 02:51:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2023-09-01 02:51:08,792 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 15 predicate places. [2023-09-01 02:51:08,792 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 626 flow [2023-09-01 02:51:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 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) [2023-09-01 02:51:08,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:08,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:08,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:09,002 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:51:09,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 553320671, now seen corresponding path program 1 times [2023-09-01 02:51:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499814035] [2023-09-01 02:51:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:09,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:09,005 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:09,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:51:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:51:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:09,160 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 02:51:09,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 02:51:09,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:09,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 [2023-09-01 02:51:09,223 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 02:51:09,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 02:51:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:09,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:09,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:09,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499814035] [2023-09-01 02:51:09,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499814035] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:09,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:09,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108776203] [2023-09-01 02:51:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:09,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:51:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:51:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:51:09,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-09-01 02:51:09,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2023-09-01 02:51:09,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:09,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-09-01 02:51:09,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:15,952 INFO L130 PetriNetUnfolder]: 39364/56390 cut-off events. [2023-09-01 02:51:15,952 INFO L131 PetriNetUnfolder]: For 5140/5140 co-relation queries the response was YES. [2023-09-01 02:51:16,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130933 conditions, 56390 events. 39364/56390 cut-off events. For 5140/5140 co-relation queries the response was YES. Maximal size of possible extension queue 1791. Compared 375838 event pairs, 34080 based on Foata normal form. 0/31990 useless extension candidates. Maximal degree in co-relation 130903. Up to 56390 conditions per place. [2023-09-01 02:51:16,340 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 02:51:16,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 830 flow [2023-09-01 02:51:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:51:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:51:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-09-01 02:51:16,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199288256227758 [2023-09-01 02:51:16,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-09-01 02:51:16,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-09-01 02:51:16,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:16,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-09-01 02:51:16,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 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) [2023-09-01 02:51:16,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:16,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:51:16,347 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 626 flow. Second operand 3 states and 708 transitions. [2023-09-01 02:51:16,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 830 flow [2023-09-01 02:51:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 829 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:16,352 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 623 flow [2023-09-01 02:51:16,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=623, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2023-09-01 02:51:16,353 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2023-09-01 02:51:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 623 flow [2023-09-01 02:51:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2023-09-01 02:51:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:16,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:16,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:51:16,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -834747525, now seen corresponding path program 1 times [2023-09-01 02:51:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:16,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193476266] [2023-09-01 02:51:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:16,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:16,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:16,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:51:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:51:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:16,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:51:16,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193476266] [2023-09-01 02:51:16,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193476266] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:51:16,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:51:16,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:51:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401419174] [2023-09-01 02:51:16,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:51:16,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:51:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:51:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:51:16,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-09-01 02:51:16,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 623 flow. Second operand has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 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) [2023-09-01 02:51:16,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:51:16,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-09-01 02:51:16,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:51:23,289 INFO L130 PetriNetUnfolder]: 39746/57226 cut-off events. [2023-09-01 02:51:23,289 INFO L131 PetriNetUnfolder]: For 5343/5343 co-relation queries the response was YES. [2023-09-01 02:51:23,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132804 conditions, 57226 events. 39746/57226 cut-off events. For 5343/5343 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 384253 event pairs, 34450 based on Foata normal form. 140/32966 useless extension candidates. Maximal degree in co-relation 132773. Up to 56389 conditions per place. [2023-09-01 02:51:23,705 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 155 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2023-09-01 02:51:23,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 158 transitions, 1284 flow [2023-09-01 02:51:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:51:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:51:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2023-09-01 02:51:23,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194839857651246 [2023-09-01 02:51:23,707 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2023-09-01 02:51:23,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2023-09-01 02:51:23,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:51:23,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2023-09-01 02:51:23,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 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) [2023-09-01 02:51:23,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 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) [2023-09-01 02:51:23,713 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 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) [2023-09-01 02:51:23,713 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 623 flow. Second operand 4 states and 943 transitions. [2023-09-01 02:51:23,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 158 transitions, 1284 flow [2023-09-01 02:51:23,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:51:23,719 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 635 flow [2023-09-01 02:51:23,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-09-01 02:51:23,719 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 17 predicate places. [2023-09-01 02:51:23,720 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 635 flow [2023-09-01 02:51:23,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 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) [2023-09-01 02:51:23,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:51:23,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:51:23,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:51:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:23,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:51:23,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:51:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -540576387, now seen corresponding path program 1 times [2023-09-01 02:51:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:51:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313564929] [2023-09-01 02:51:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:51:23,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:51:23,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:51:23,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:51:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:51:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:51:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:51:24,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:51:24,367 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:51:24,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:51:24,450 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:51:24,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:51:24,576 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 02:51:24,576 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2023-09-01 02:51:24,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-09-01 02:51:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:51:24,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-09-01 02:51:24,635 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 02:51:24,636 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2023-09-01 02:51:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:51:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:51:30,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:51:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313564929] [2023-09-01 02:51:30,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313564929] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:51:30,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:51:30,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:51:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393814655] [2023-09-01 02:51:30,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:51:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:51:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:51:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:51:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:51:33,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:35,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:38,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:41,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:43,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:49,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:51,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:53,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:57,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:51:59,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:00,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:01,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 562 [2023-09-01 02:52:01,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 635 flow. Second operand has 10 states, 10 states have (on average 177.2) internal successors, (1772), 10 states have internal predecessors, (1772), 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) [2023-09-01 02:52:01,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:52:01,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 562 [2023-09-01 02:52:01,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:52:14,923 WARN L222 SmtUtils]: Spent 13.41s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:52:20,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:25,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:27,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:29,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:39,801 WARN L222 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:52:41,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:43,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:45,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:46,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:52:57,505 WARN L222 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:53:06,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:53:25,187 INFO L130 PetriNetUnfolder]: 70290/101558 cut-off events. [2023-09-01 02:53:25,187 INFO L131 PetriNetUnfolder]: For 15749/15749 co-relation queries the response was YES. [2023-09-01 02:53:25,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243648 conditions, 101558 events. 70290/101558 cut-off events. For 15749/15749 co-relation queries the response was YES. Maximal size of possible extension queue 3030. Compared 732770 event pairs, 59410 based on Foata normal form. 4840/70538 useless extension candidates. Maximal degree in co-relation 243615. Up to 56331 conditions per place. [2023-09-01 02:53:26,020 INFO L137 encePairwiseOnDemand]: 544/562 looper letters, 250 selfloop transitions, 56 changer transitions 0/306 dead transitions. [2023-09-01 02:53:26,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 306 transitions, 2345 flow [2023-09-01 02:53:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 02:53:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 02:53:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3172 transitions. [2023-09-01 02:53:26,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33200753611052963 [2023-09-01 02:53:26,028 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3172 transitions. [2023-09-01 02:53:26,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3172 transitions. [2023-09-01 02:53:26,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:53:26,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3172 transitions. [2023-09-01 02:53:26,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 186.58823529411765) internal successors, (3172), 17 states have internal predecessors, (3172), 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) [2023-09-01 02:53:26,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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) [2023-09-01 02:53:26,043 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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) [2023-09-01 02:53:26,043 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 635 flow. Second operand 17 states and 3172 transitions. [2023-09-01 02:53:26,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 306 transitions, 2345 flow [2023-09-01 02:53:26,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 306 transitions, 2339 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:53:26,068 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1261 flow [2023-09-01 02:53:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1261, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2023-09-01 02:53:26,068 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2023-09-01 02:53:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1261 flow [2023-09-01 02:53:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.2) internal successors, (1772), 10 states have internal predecessors, (1772), 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) [2023-09-01 02:53:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:53:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:53:26,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 02:53:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:53:26,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:53:26,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:53:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -598308351, now seen corresponding path program 3 times [2023-09-01 02:53:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:53:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453910768] [2023-09-01 02:53:26,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:53:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:53:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:53:26,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:53:26,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:53:26,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:53:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:53:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:53:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:53:26,605 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:53:26,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:53:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:53:27,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:53:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:53:30,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:53:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453910768] [2023-09-01 02:53:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453910768] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:53:30,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:53:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:53:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850458607] [2023-09-01 02:53:30,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:53:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:53:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:53:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:53:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:53:56,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 562 [2023-09-01 02:53:56,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1261 flow. Second operand has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 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) [2023-09-01 02:53:56,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:53:56,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 562 [2023-09-01 02:53:56,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:54:10,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:12,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:14,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:15,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:17,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:19,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:21,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:23,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:25,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:27,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:32,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:34,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:35,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:37,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:39,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:41,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:43,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:45,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:47,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:49,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:54:52,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:55:26,215 INFO L130 PetriNetUnfolder]: 105429/152321 cut-off events. [2023-09-01 02:55:26,215 INFO L131 PetriNetUnfolder]: For 64327/64327 co-relation queries the response was YES. [2023-09-01 02:55:27,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425528 conditions, 152321 events. 105429/152321 cut-off events. For 64327/64327 co-relation queries the response was YES. Maximal size of possible extension queue 3382. Compared 1120880 event pairs, 89115 based on Foata normal form. 44/101935 useless extension candidates. Maximal degree in co-relation 425487. Up to 29641 conditions per place. [2023-09-01 02:55:27,663 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 675 selfloop transitions, 119 changer transitions 0/794 dead transitions. [2023-09-01 02:55:27,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 794 transitions, 5886 flow [2023-09-01 02:55:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:55:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:55:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5611 transitions. [2023-09-01 02:55:27,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159994068801898 [2023-09-01 02:55:27,672 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5611 transitions. [2023-09-01 02:55:27,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5611 transitions. [2023-09-01 02:55:27,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:27,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5611 transitions. [2023-09-01 02:55:27,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 233.79166666666666) internal successors, (5611), 24 states have internal predecessors, (5611), 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) [2023-09-01 02:55:27,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 562.0) internal successors, (14050), 25 states have internal predecessors, (14050), 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) [2023-09-01 02:55:27,691 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 562.0) internal successors, (14050), 25 states have internal predecessors, (14050), 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) [2023-09-01 02:55:27,692 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1261 flow. Second operand 24 states and 5611 transitions. [2023-09-01 02:55:27,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 794 transitions, 5886 flow [2023-09-01 02:55:28,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 794 transitions, 5869 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 02:55:28,154 INFO L231 Difference]: Finished difference. Result has 143 places, 189 transitions, 2004 flow [2023-09-01 02:55:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2004, PETRI_PLACES=143, PETRI_TRANSITIONS=189} [2023-09-01 02:55:28,155 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 74 predicate places. [2023-09-01 02:55:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 189 transitions, 2004 flow [2023-09-01 02:55:28,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 205.0) internal successors, (4920), 24 states have internal predecessors, (4920), 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) [2023-09-01 02:55:28,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:55:28,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:28,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:28,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:55:28,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash 422002152, now seen corresponding path program 1 times [2023-09-01 02:55:28,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:28,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552478226] [2023-09-01 02:55:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:28,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:28,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:55:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:28,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:55:28,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:55:28,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:28,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552478226] [2023-09-01 02:55:28,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552478226] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:28,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:28,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:55:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881363032] [2023-09-01 02:55:28,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:28,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:55:28,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:55:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:55:28,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-09-01 02:55:28,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 189 transitions, 2004 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-09-01 02:55:28,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:28,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-09-01 02:55:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:55:48,359 INFO L130 PetriNetUnfolder]: 96309/139391 cut-off events. [2023-09-01 02:55:48,359 INFO L131 PetriNetUnfolder]: For 68063/68063 co-relation queries the response was YES. [2023-09-01 02:55:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392447 conditions, 139391 events. 96309/139391 cut-off events. For 68063/68063 co-relation queries the response was YES. Maximal size of possible extension queue 3145. Compared 1001044 event pairs, 34920 based on Foata normal form. 3750/95591 useless extension candidates. Maximal degree in co-relation 392392. Up to 124666 conditions per place. [2023-09-01 02:55:50,055 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 216 selfloop transitions, 2 changer transitions 0/218 dead transitions. [2023-09-01 02:55:50,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 218 transitions, 2571 flow [2023-09-01 02:55:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:55:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:55:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-09-01 02:55:50,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531435349940688 [2023-09-01 02:55:50,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-09-01 02:55:50,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-09-01 02:55:50,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:55:50,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-09-01 02:55:50,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 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) [2023-09-01 02:55:50,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:55:50,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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) [2023-09-01 02:55:50,061 INFO L175 Difference]: Start difference. First operand has 143 places, 189 transitions, 2004 flow. Second operand 3 states and 764 transitions. [2023-09-01 02:55:50,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 218 transitions, 2571 flow [2023-09-01 02:55:50,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 218 transitions, 2328 flow, removed 37 selfloop flow, removed 10 redundant places. [2023-09-01 02:55:50,384 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 1777 flow [2023-09-01 02:55:50,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1777, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2023-09-01 02:55:50,385 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2023-09-01 02:55:50,385 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 1777 flow [2023-09-01 02:55:50,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-09-01 02:55:50,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:55:50,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:55:50,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 02:55:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:50,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:55:50,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:55:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 422002406, now seen corresponding path program 1 times [2023-09-01 02:55:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:55:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610174666] [2023-09-01 02:55:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:55:50,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:55:50,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:55:50,601 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:55:50,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:55:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:55:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:55:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:55:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:55:50,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:55:50,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:55:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610174666] [2023-09-01 02:55:50,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610174666] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:55:50,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:55:50,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:55:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138199909] [2023-09-01 02:55:50,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:55:50,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:55:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:55:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:55:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:55:51,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 562 [2023-09-01 02:55:51,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 1777 flow. Second operand has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-09-01 02:55:51,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:55:51,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 562 [2023-09-01 02:55:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:56:09,862 INFO L130 PetriNetUnfolder]: 90162/130644 cut-off events. [2023-09-01 02:56:09,862 INFO L131 PetriNetUnfolder]: For 66843/66843 co-relation queries the response was YES. [2023-09-01 02:56:11,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388103 conditions, 130644 events. 90162/130644 cut-off events. For 66843/66843 co-relation queries the response was YES. Maximal size of possible extension queue 3088. Compared 955233 event pairs, 75742 based on Foata normal form. 12/86258 useless extension candidates. Maximal degree in co-relation 388046. Up to 129951 conditions per place. [2023-09-01 02:56:11,702 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 164 selfloop transitions, 48 changer transitions 1/213 dead transitions. [2023-09-01 02:56:11,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 213 transitions, 2306 flow [2023-09-01 02:56:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:56:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:56:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1160 transitions. [2023-09-01 02:56:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128113879003559 [2023-09-01 02:56:11,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1160 transitions. [2023-09-01 02:56:11,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1160 transitions. [2023-09-01 02:56:11,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:56:11,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1160 transitions. [2023-09-01 02:56:11,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 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) [2023-09-01 02:56:11,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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) [2023-09-01 02:56:11,710 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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) [2023-09-01 02:56:11,710 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 1777 flow. Second operand 5 states and 1160 transitions. [2023-09-01 02:56:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 213 transitions, 2306 flow [2023-09-01 02:56:12,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 213 transitions, 2304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:56:12,277 INFO L231 Difference]: Finished difference. Result has 141 places, 192 transitions, 1948 flow [2023-09-01 02:56:12,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1948, PETRI_PLACES=141, PETRI_TRANSITIONS=192} [2023-09-01 02:56:12,277 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 72 predicate places. [2023-09-01 02:56:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 192 transitions, 1948 flow [2023-09-01 02:56:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-09-01 02:56:12,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:56:12,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:56:12,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:56:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:12,485 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-09-01 02:56:12,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:56:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1926378657, now seen corresponding path program 1 times [2023-09-01 02:56:12,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:56:12,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116746631] [2023-09-01 02:56:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:56:12,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:56:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:56:12,486 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:56:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:56:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:56:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:56:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:56:12,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 02:56:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 02:56:12,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:56:12,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:56:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116746631] [2023-09-01 02:56:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116746631] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:56:12,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:56:12,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:56:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330792052] [2023-09-01 02:56:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:56:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:56:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:56:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:56:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:56:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 562 [2023-09-01 02:56:12,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 192 transitions, 1948 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 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) [2023-09-01 02:56:12,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:56:12,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 562 [2023-09-01 02:56:12,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand