./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/parallel-parallel-sum-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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:38:08,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:38:08,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:38:08,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:38:08,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:38:08,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:38:08,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:38:08,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:38:08,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:38:08,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:38:08,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:38:08,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:38:08,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:38:08,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:38:08,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:38:08,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:38:08,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:38:08,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:38:08,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:38:08,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:38:08,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:38:08,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:38:08,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:38:08,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:38:08,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:38:08,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:38:08,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:38:08,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:38:08,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:38:08,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:38:08,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:38:08,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:38:08,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:38:08,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:38:08,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:38:08,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:38:08,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:38:08,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:38:08,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:38:08,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:38:08,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:38:08,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:38:08,578 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:38:08,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:38:08,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:38:08,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:38:08,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:38:08,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:38:08,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:38:08,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:38:08,581 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:38:08,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:38:08,581 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:38:08,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:38:08,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:38:08,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:38:08,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:38:08,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:38:08,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:38:08,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:38:08,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:38:08,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:38:08,585 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:38:08,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:38:08,585 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:38:08,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:38:08,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:38:08,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:38:08,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:38:08,849 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:38:08,849 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:38:08,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-29 23:38:09,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:38:10,032 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:38:10,033 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-29 23:38:10,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1daefa69/e2a742a7cab94f6eaec0ec8b30479aa8/FLAGaf1540c11 [2023-08-29 23:38:10,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1daefa69/e2a742a7cab94f6eaec0ec8b30479aa8 [2023-08-29 23:38:10,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:38:10,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:38:10,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:38:10,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:38:10,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:38:10,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:38:10" (1/1) ... [2023-08-29 23:38:10,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d5af71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:10, skipping insertion in model container [2023-08-29 23:38:10,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:38:10" (1/1) ... [2023-08-29 23:38:10,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:38:10,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:38:10,254 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-29 23:38:10,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:38:10,279 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) [2023-08-29 23:38:10,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@525d88e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:10, skipping insertion in model container [2023-08-29 23:38:10,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:38:10,281 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:38:10,283 INFO L158 Benchmark]: Toolchain (without parser) took 211.09ms. Allocated memory is still 79.7MB. Free memory was 57.9MB in the beginning and 47.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:38:10,283 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 43.5MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:38:10,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.65ms. Allocated memory is still 79.7MB. Free memory was 57.9MB in the beginning and 47.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:38:10,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 43.5MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.65ms. Allocated memory is still 79.7MB. Free memory was 57.9MB in the beginning and 47.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 145]: 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/parallel-parallel-sum-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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:38:11,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:38:11,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:38:11,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:38:11,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:38:11,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:38:11,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:38:11,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:38:11,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:38:11,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:38:11,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:38:11,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:38:11,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:38:11,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:38:11,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:38:11,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:38:11,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:38:11,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:38:11,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:38:11,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:38:11,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:38:11,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:38:11,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:38:11,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:38:11,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:38:11,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:38:11,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:38:11,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:38:11,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:38:11,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:38:11,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:38:11,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:38:11,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:38:11,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:38:11,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:38:11,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:38:11,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:38:11,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:38:11,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:38:11,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:38:11,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:38:11,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:38:11,930 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:38:11,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:38:11,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:38:11,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:38:11,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:38:11,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:38:11,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:38:11,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:38:11,933 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:38:11,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:38:11,934 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:38:11,934 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:38:11,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:38:11,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:38:11,935 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:38:11,936 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:38:11,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:38:11,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:38:11,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:38:11,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:38:11,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:38:11,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:38:11,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:38:11,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:38:11,937 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:38:11,937 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:38:11,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:38:11,938 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:38:11,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:38:11,938 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:38:11,938 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:38:11,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:38:12,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:38:12,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:38:12,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:38:12,199 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:38:12,200 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:38:12,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-29 23:38:13,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:38:13,364 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:38:13,364 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-29 23:38:13,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f181c50/f6048988eac242cca811c3c9308b156b/FLAGc4f48fc99 [2023-08-29 23:38:13,377 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f181c50/f6048988eac242cca811c3c9308b156b [2023-08-29 23:38:13,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:38:13,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:38:13,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:38:13,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:38:13,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:38:13,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e0af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13, skipping insertion in model container [2023-08-29 23:38:13,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:38:13,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:38:13,515 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-29 23:38:13,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:38:13,539 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:38:13,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:38:13,568 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-29 23:38:13,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:38:13,578 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:38:13,606 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-29 23:38:13,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:38:13,615 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:38:13,617 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:38:13,621 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:38:13,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13 WrapperNode [2023-08-29 23:38:13,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:38:13,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:38:13,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:38:13,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:38:13,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,708 INFO L138 Inliner]: procedures = 29, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2023-08-29 23:38:13,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:38:13,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:38:13,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:38:13,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:38:13,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:38:13,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:38:13,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:38:13,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:38:13,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (1/1) ... [2023-08-29 23:38:13,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:38:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:38:13,783 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) [2023-08-29 23:38:13,800 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 [2023-08-29 23:38:13,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:38:13,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:38:13,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:38:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:38:13,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:38:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:38:13,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:38:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:38:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:38:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:38:13,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:38:13,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:38:13,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:38:13,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:38:13,824 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:38:13,912 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:38:13,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:38:14,391 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:38:14,556 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:38:14,557 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-29 23:38:14,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:38:14 BoogieIcfgContainer [2023-08-29 23:38:14,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:38:14,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:38:14,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:38:14,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:38:14,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:38:13" (1/3) ... [2023-08-29 23:38:14,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b1a826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:38:14, skipping insertion in model container [2023-08-29 23:38:14,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:38:13" (2/3) ... [2023-08-29 23:38:14,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b1a826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:38:14, skipping insertion in model container [2023-08-29 23:38:14,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:38:14" (3/3) ... [2023-08-29 23:38:14,565 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-08-29 23:38:14,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:38:14,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-29 23:38:14,576 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:38:14,663 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 23:38:14,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 226 transitions, 484 flow [2023-08-29 23:38:14,775 INFO L130 PetriNetUnfolder]: 15/222 cut-off events. [2023-08-29 23:38:14,776 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:38:14,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 15/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-29 23:38:14,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 226 transitions, 484 flow [2023-08-29 23:38:14,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 218 transitions, 460 flow [2023-08-29 23:38:14,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:38:14,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 218 transitions, 460 flow [2023-08-29 23:38:14,801 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 218 transitions, 460 flow [2023-08-29 23:38:14,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 218 transitions, 460 flow [2023-08-29 23:38:14,846 INFO L130 PetriNetUnfolder]: 15/218 cut-off events. [2023-08-29 23:38:14,846 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:38:14,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 15/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 222 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-29 23:38:14,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2023-08-29 23:38:35,917 INFO L134 LiptonReduction]: Checked pairs total: 8490 [2023-08-29 23:38:35,917 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-29 23:38:35,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:38:35,933 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;@31012adc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:38:35,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-29 23:38:35,935 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:38:35,935 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:38:35,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:35,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:35,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:35,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 36328, now seen corresponding path program 1 times [2023-08-29 23:38:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:35,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556440670] [2023-08-29 23:38:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:35,949 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 [2023-08-29 23:38:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:35,951 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) [2023-08-29 23:38:35,956 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 [2023-08-29 23:38:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:38:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:36,243 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:38:36,243 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:38:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:36,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:36,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:36,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556440670] [2023-08-29 23:38:36,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556440670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:36,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:36,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265977140] [2023-08-29 23:38:36,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:36,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:36,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-29 23:38:36,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:36,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:36,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-29 23:38:36,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:37,780 INFO L130 PetriNetUnfolder]: 12817/16564 cut-off events. [2023-08-29 23:38:37,780 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-29 23:38:37,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33602 conditions, 16564 events. 12817/16564 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 75502 event pairs, 10128 based on Foata normal form. 0/6626 useless extension candidates. Maximal degree in co-relation 28740. Up to 16564 conditions per place. [2023-08-29 23:38:37,875 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-29 23:38:37,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 248 flow [2023-08-29 23:38:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-29 23:38:37,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408133623819898 [2023-08-29 23:38:37,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-29 23:38:37,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-29 23:38:37,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:37,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-29 23:38:37,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2023-08-29 23:38:37,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:37,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:37,901 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 140 flow. Second operand 3 states and 607 transitions. [2023-08-29 23:38:37,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 248 flow [2023-08-29 23:38:37,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:38:37,915 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 122 flow [2023-08-29 23:38:37,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-29 23:38:37,920 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-08-29 23:38:37,920 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 122 flow [2023-08-29 23:38:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:37,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:37,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:37,931 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 [2023-08-29 23:38:38,125 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 [2023-08-29 23:38:38,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:38,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 36329, now seen corresponding path program 1 times [2023-08-29 23:38:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:38,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578091061] [2023-08-29 23:38:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:38,130 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 [2023-08-29 23:38:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:38,135 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) [2023-08-29 23:38:38,140 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 [2023-08-29 23:38:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:38:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:38,464 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:38:38,464 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:38:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:38,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:38,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578091061] [2023-08-29 23:38:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578091061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:38,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:38,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188385759] [2023-08-29 23:38:38,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:38,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-29 23:38:38,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:38,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:38,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-29 23:38:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:40,899 INFO L130 PetriNetUnfolder]: 25633/33126 cut-off events. [2023-08-29 23:38:40,900 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:38:40,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66568 conditions, 33126 events. 25633/33126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 165092 event pairs, 20256 based on Foata normal form. 0/13251 useless extension candidates. Maximal degree in co-relation 66562. Up to 16565 conditions per place. [2023-08-29 23:38:41,001 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 108 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-29 23:38:41,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 458 flow [2023-08-29 23:38:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2023-08-29 23:38:41,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793028322440087 [2023-08-29 23:38:41,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2023-08-29 23:38:41,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2023-08-29 23:38:41,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:41,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2023-08-29 23:38:41,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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) [2023-08-29 23:38:41,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:41,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:41,011 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 122 flow. Second operand 3 states and 660 transitions. [2023-08-29 23:38:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 458 flow [2023-08-29 23:38:41,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:41,014 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 133 flow [2023-08-29 23:38:41,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2023-08-29 23:38:41,015 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-08-29 23:38:41,016 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 133 flow [2023-08-29 23:38:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:41,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:41,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:41,025 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 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:41,224 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 [2023-08-29 23:38:41,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:41,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 36403, now seen corresponding path program 1 times [2023-08-29 23:38:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:41,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736409690] [2023-08-29 23:38:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:41,230 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 [2023-08-29 23:38:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:41,231 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) [2023-08-29 23:38:41,233 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 [2023-08-29 23:38:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:38:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:41,402 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-08-29 23:38:41,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-29 23:38:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:41,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:41,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736409690] [2023-08-29 23:38:41,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736409690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:41,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:41,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494688721] [2023-08-29 23:38:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:41,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-29 23:38:41,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:41,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:41,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-29 23:38:41,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:43,445 INFO L130 PetriNetUnfolder]: 20633/26874 cut-off events. [2023-08-29 23:38:43,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:38:43,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54070 conditions, 26874 events. 20633/26874 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 131888 event pairs, 16256 based on Foata normal form. 0/11253 useless extension candidates. Maximal degree in co-relation 54062. Up to 26874 conditions per place. [2023-08-29 23:38:43,583 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-29 23:38:43,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 239 flow [2023-08-29 23:38:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-29 23:38:43,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439360929557008 [2023-08-29 23:38:43,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-29 23:38:43,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-29 23:38:43,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:43,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-29 23:38:43,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 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) [2023-08-29 23:38:43,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:43,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:43,595 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 133 flow. Second operand 3 states and 605 transitions. [2023-08-29 23:38:43,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 239 flow [2023-08-29 23:38:43,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:43,597 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 129 flow [2023-08-29 23:38:43,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-29 23:38:43,598 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2023-08-29 23:38:43,598 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 129 flow [2023-08-29 23:38:43,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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) [2023-08-29 23:38:43,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:43,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:38:43,630 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 [2023-08-29 23:38:43,809 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 [2023-08-29 23:38:43,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:43,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash 36404, now seen corresponding path program 1 times [2023-08-29 23:38:43,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:43,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661867524] [2023-08-29 23:38:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:43,811 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 [2023-08-29 23:38:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:43,829 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) [2023-08-29 23:38:43,917 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 [2023-08-29 23:38:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:38:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:44,121 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-29 23:38:44,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-29 23:38:44,156 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-29 23:38:44,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-29 23:38:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:44,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:44,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661867524] [2023-08-29 23:38:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661867524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:44,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:44,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:44,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057179629] [2023-08-29 23:38:44,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:44,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:44,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:44,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-29 23:38:44,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-08-29 23:38:44,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:44,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-29 23:38:44,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:45,552 INFO L130 PetriNetUnfolder]: 15633/20622 cut-off events. [2023-08-29 23:38:45,553 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:38:45,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41566 conditions, 20622 events. 15633/20622 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 99651 event pairs, 12256 based on Foata normal form. 0/9253 useless extension candidates. Maximal degree in co-relation 41557. Up to 20622 conditions per place. [2023-08-29 23:38:45,667 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-29 23:38:45,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 231 flow [2023-08-29 23:38:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-29 23:38:45,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422657952069717 [2023-08-29 23:38:45,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-29 23:38:45,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-29 23:38:45,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:45,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-29 23:38:45,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2023-08-29 23:38:45,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:45,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:45,675 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 129 flow. Second operand 3 states and 609 transitions. [2023-08-29 23:38:45,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 231 flow [2023-08-29 23:38:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:45,678 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 126 flow [2023-08-29 23:38:45,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-29 23:38:45,680 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-08-29 23:38:45,680 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 126 flow [2023-08-29 23:38:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-08-29 23:38:45,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:45,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:38:45,705 INFO L552 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)] Ended with exit code 0 [2023-08-29 23:38:45,887 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 [2023-08-29 23:38:45,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:45,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1128707, now seen corresponding path program 1 times [2023-08-29 23:38:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431003464] [2023-08-29 23:38:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:45,889 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 [2023-08-29 23:38:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:45,892 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) [2023-08-29 23:38:45,893 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 [2023-08-29 23:38:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:38:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:46,100 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:38:46,100 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:38:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:46,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:38:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:46,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431003464] [2023-08-29 23:38:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431003464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:38:46,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:38:46,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:38:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046612977] [2023-08-29 23:38:46,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:38:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:38:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:38:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:38:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-08-29 23:38:46,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 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) [2023-08-29 23:38:46,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:46,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-08-29 23:38:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:48,704 INFO L130 PetriNetUnfolder]: 23451/30936 cut-off events. [2023-08-29 23:38:48,705 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:38:48,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62354 conditions, 30936 events. 23451/30936 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157766 event pairs, 18384 based on Foata normal form. 0/13883 useless extension candidates. Maximal degree in co-relation 62344. Up to 10312 conditions per place. [2023-08-29 23:38:48,896 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 149 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2023-08-29 23:38:48,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 156 transitions, 666 flow [2023-08-29 23:38:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:38:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:38:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2023-08-29 23:38:48,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455337690631808 [2023-08-29 23:38:48,900 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2023-08-29 23:38:48,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2023-08-29 23:38:48,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:48,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2023-08-29 23:38:48,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 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) [2023-08-29 23:38:48,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 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) [2023-08-29 23:38:48,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 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) [2023-08-29 23:38:48,910 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 126 flow. Second operand 6 states and 1227 transitions. [2023-08-29 23:38:48,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 156 transitions, 666 flow [2023-08-29 23:38:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 156 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:48,914 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 179 flow [2023-08-29 23:38:48,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-29 23:38:48,918 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-29 23:38:48,918 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 179 flow [2023-08-29 23:38:48,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 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) [2023-08-29 23:38:48,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:48,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:38:48,929 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 [2023-08-29 23:38:49,125 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 [2023-08-29 23:38:49,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:49,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 35010167, now seen corresponding path program 1 times [2023-08-29 23:38:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:49,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698837620] [2023-08-29 23:38:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:49,126 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 [2023-08-29 23:38:49,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:49,128 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) [2023-08-29 23:38:49,129 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 [2023-08-29 23:38:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 23:38:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:49,297 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:38:49,298 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:38:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:49,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:49,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698837620] [2023-08-29 23:38:49,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698837620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:49,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:49,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:38:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695151579] [2023-08-29 23:38:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:38:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:38:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:38:49,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 459 [2023-08-29 23:38:49,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 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) [2023-08-29 23:38:49,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:49,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 459 [2023-08-29 23:38:49,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:50,382 INFO L130 PetriNetUnfolder]: 10854/14421 cut-off events. [2023-08-29 23:38:50,382 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:38:50,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29137 conditions, 14421 events. 10854/14421 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66097 event pairs, 7947 based on Foata normal form. 0/7605 useless extension candidates. Maximal degree in co-relation 29122. Up to 14414 conditions per place. [2023-08-29 23:38:50,457 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-29 23:38:50,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 279 flow [2023-08-29 23:38:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:38:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:38:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 776 transitions. [2023-08-29 23:38:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-08-29 23:38:50,461 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 776 transitions. [2023-08-29 23:38:50,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 776 transitions. [2023-08-29 23:38:50,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:50,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 776 transitions. [2023-08-29 23:38:50,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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) [2023-08-29 23:38:50,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:38:50,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:38:50,465 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 179 flow. Second operand 4 states and 776 transitions. [2023-08-29 23:38:50,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 279 flow [2023-08-29 23:38:50,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 269 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:50,466 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 169 flow [2023-08-29 23:38:50,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-29 23:38:50,467 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-29 23:38:50,467 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 169 flow [2023-08-29 23:38:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 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) [2023-08-29 23:38:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:50,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:38:50,476 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 [2023-08-29 23:38:50,674 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 [2023-08-29 23:38:50,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:50,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash 35010169, now seen corresponding path program 1 times [2023-08-29 23:38:50,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:50,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250099258] [2023-08-29 23:38:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:50,676 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 [2023-08-29 23:38:50,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:50,679 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) [2023-08-29 23:38:50,680 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 [2023-08-29 23:38:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:38:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:50,893 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-29 23:38:50,893 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-29 23:38:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:50,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:50,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:50,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250099258] [2023-08-29 23:38:50,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250099258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:50,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:50,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:38:50,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354971263] [2023-08-29 23:38:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:38:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:38:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:38:51,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-29 23:38:51,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-29 23:38:51,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:51,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-29 23:38:51,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:52,595 INFO L130 PetriNetUnfolder]: 14478/19323 cut-off events. [2023-08-29 23:38:52,595 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-29 23:38:52,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39009 conditions, 19323 events. 14478/19323 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 99034 event pairs, 2571 based on Foata normal form. 0/10155 useless extension candidates. Maximal degree in co-relation 38993. Up to 15241 conditions per place. [2023-08-29 23:38:52,668 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 87 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-08-29 23:38:52,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 440 flow [2023-08-29 23:38:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:38:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:38:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-08-29 23:38:52,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384531590413943 [2023-08-29 23:38:52,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-08-29 23:38:52,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-08-29 23:38:52,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:52,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-08-29 23:38:52,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 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) [2023-08-29 23:38:52,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:38:52,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:38:52,675 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 169 flow. Second operand 4 states and 805 transitions. [2023-08-29 23:38:52,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 440 flow [2023-08-29 23:38:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:38:52,677 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 193 flow [2023-08-29 23:38:52,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-29 23:38:52,678 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-29 23:38:52,678 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 193 flow [2023-08-29 23:38:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-29 23:38:52,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:52,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:38:52,685 INFO L552 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)] Ended with exit code 0 [2023-08-29 23:38:52,884 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 [2023-08-29 23:38:52,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:52,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 35010198, now seen corresponding path program 1 times [2023-08-29 23:38:52,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:52,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969345707] [2023-08-29 23:38:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:52,888 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 [2023-08-29 23:38:52,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:52,889 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) [2023-08-29 23:38:52,891 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 [2023-08-29 23:38:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:38:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:53,120 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-08-29 23:38:53,120 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 7 case distinctions, treesize of input 49 treesize of output 62 [2023-08-29 23:38:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:53,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:53,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969345707] [2023-08-29 23:38:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969345707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:53,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:53,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591901930] [2023-08-29 23:38:53,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:53,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:53,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-29 23:38:53,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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) [2023-08-29 23:38:53,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:53,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-29 23:38:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:54,670 INFO L130 PetriNetUnfolder]: 13596/18135 cut-off events. [2023-08-29 23:38:54,671 INFO L131 PetriNetUnfolder]: For 2160/2160 co-relation queries the response was YES. [2023-08-29 23:38:54,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40995 conditions, 18135 events. 13596/18135 cut-off events. For 2160/2160 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 85611 event pairs, 9576 based on Foata normal form. 0/11892 useless extension candidates. Maximal degree in co-relation 40978. Up to 18135 conditions per place. [2023-08-29 23:38:54,726 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 53 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-29 23:38:54,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 297 flow [2023-08-29 23:38:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-29 23:38:54,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-29 23:38:54,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-29 23:38:54,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-29 23:38:54,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:54,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-29 23:38:54,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2023-08-29 23:38:54,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:54,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:54,732 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 193 flow. Second operand 3 states and 597 transitions. [2023-08-29 23:38:54,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 297 flow [2023-08-29 23:38:54,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:38:54,733 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 184 flow [2023-08-29 23:38:54,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-29 23:38:54,734 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-29 23:38:54,734 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 184 flow [2023-08-29 23:38:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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) [2023-08-29 23:38:54,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:54,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 23:38:54,742 INFO L552 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)] Ended with exit code 0 [2023-08-29 23:38:54,940 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 [2023-08-29 23:38:54,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:54,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 35010200, now seen corresponding path program 1 times [2023-08-29 23:38:54,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387128415] [2023-08-29 23:38:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:54,942 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 [2023-08-29 23:38:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:54,943 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) [2023-08-29 23:38:54,945 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 [2023-08-29 23:38:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:38:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:38:55,161 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-29 23:38:55,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-29 23:38:55,182 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:38:55,182 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 31 treesize of output 27 [2023-08-29 23:38:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:55,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:38:55,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:55,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387128415] [2023-08-29 23:38:55,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387128415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:38:55,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:38:55,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:38:55,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030522650] [2023-08-29 23:38:55,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:38:55,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:38:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:38:55,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:38:55,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-29 23:38:55,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2023-08-29 23:38:55,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:55,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-29 23:38:55,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:56,624 INFO L130 PetriNetUnfolder]: 12714/16947 cut-off events. [2023-08-29 23:38:56,625 INFO L131 PetriNetUnfolder]: For 2051/2051 co-relation queries the response was YES. [2023-08-29 23:38:56,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37689 conditions, 16947 events. 12714/16947 cut-off events. For 2051/2051 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 79071 event pairs, 8937 based on Foata normal form. 0/11349 useless extension candidates. Maximal degree in co-relation 37672. Up to 16947 conditions per place. [2023-08-29 23:38:56,730 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 51 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-29 23:38:56,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 284 flow [2023-08-29 23:38:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:38:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:38:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-29 23:38:56,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364560639070443 [2023-08-29 23:38:56,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-29 23:38:56,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-29 23:38:56,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:56,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-29 23:38:56,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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) [2023-08-29 23:38:56,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:56,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:38:56,737 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 184 flow. Second operand 3 states and 601 transitions. [2023-08-29 23:38:56,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 284 flow [2023-08-29 23:38:56,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:38:56,740 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 181 flow [2023-08-29 23:38:56,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-08-29 23:38:56,741 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-29 23:38:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 181 flow [2023-08-29 23:38:56,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2023-08-29 23:38:56,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:38:56,748 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 [2023-08-29 23:38:56,944 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 [2023-08-29 23:38:56,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:38:56,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -731937687, now seen corresponding path program 2 times [2023-08-29 23:38:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:38:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958892407] [2023-08-29 23:38:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:38:56,946 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 [2023-08-29 23:38:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:38:56,947 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) [2023-08-29 23:38:56,949 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 (11)] Waiting until timeout for monitored process [2023-08-29 23:38:57,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:38:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:38:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:38:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:57,141 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:38:57,141 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:38:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:57,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:38:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:57,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:38:57,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958892407] [2023-08-29 23:38:57,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958892407] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:38:57,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:38:57,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:38:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756194611] [2023-08-29 23:38:57,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:38:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:38:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:38:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:38:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:38:59,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-29 23:38:59,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 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) [2023-08-29 23:38:59,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:59,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-29 23:38:59,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:07,038 INFO L130 PetriNetUnfolder]: 42372/56474 cut-off events. [2023-08-29 23:39:07,039 INFO L131 PetriNetUnfolder]: For 6821/6821 co-relation queries the response was YES. [2023-08-29 23:39:07,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125523 conditions, 56474 events. 42372/56474 cut-off events. For 6821/6821 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 300970 event pairs, 29790 based on Foata normal form. 6/37820 useless extension candidates. Maximal degree in co-relation 125505. Up to 11421 conditions per place. [2023-08-29 23:39:07,335 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 432 selfloop transitions, 12 changer transitions 0/444 dead transitions. [2023-08-29 23:39:07,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 444 transitions, 2113 flow [2023-08-29 23:39:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:39:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:39:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2578 transitions. [2023-08-29 23:39:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46804647785039943 [2023-08-29 23:39:07,341 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2578 transitions. [2023-08-29 23:39:07,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2578 transitions. [2023-08-29 23:39:07,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:07,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2578 transitions. [2023-08-29 23:39:07,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.83333333333334) internal successors, (2578), 12 states have internal predecessors, (2578), 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) [2023-08-29 23:39:07,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 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) [2023-08-29 23:39:07,350 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 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) [2023-08-29 23:39:07,350 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 181 flow. Second operand 12 states and 2578 transitions. [2023-08-29 23:39:07,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 444 transitions, 2113 flow [2023-08-29 23:39:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 444 transitions, 2112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:07,356 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 281 flow [2023-08-29 23:39:07,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2023-08-29 23:39:07,356 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 14 predicate places. [2023-08-29 23:39:07,357 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 281 flow [2023-08-29 23:39:07,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 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) [2023-08-29 23:39:07,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:07,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:39:07,368 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 [2023-08-29 23:39:07,564 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 [2023-08-29 23:39:07,564 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:07,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash -714940251, now seen corresponding path program 1 times [2023-08-29 23:39:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:07,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030173374] [2023-08-29 23:39:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:07,565 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 [2023-08-29 23:39:07,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:07,566 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) [2023-08-29 23:39:07,568 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 [2023-08-29 23:39:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:39:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:07,770 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:39:07,770 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:39:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:07,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:07,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030173374] [2023-08-29 23:39:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030173374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:07,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:07,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:39:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634491037] [2023-08-29 23:39:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:07,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:39:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:39:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:39:08,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-29 23:39:08,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 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) [2023-08-29 23:39:08,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:08,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-29 23:39:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:12,112 INFO L130 PetriNetUnfolder]: 38488/51408 cut-off events. [2023-08-29 23:39:12,112 INFO L131 PetriNetUnfolder]: For 6316/6316 co-relation queries the response was YES. [2023-08-29 23:39:12,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114200 conditions, 51408 events. 38488/51408 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 272712 event pairs, 27164 based on Foata normal form. 156/34598 useless extension candidates. Maximal degree in co-relation 114174. Up to 50828 conditions per place. [2023-08-29 23:39:12,408 INFO L137 encePairwiseOnDemand]: 452/459 looper letters, 87 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-29 23:39:12,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 538 flow [2023-08-29 23:39:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:39:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:39:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-29 23:39:12,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-29 23:39:12,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-29 23:39:12,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-29 23:39:12,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:12,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-29 23:39:12,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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) [2023-08-29 23:39:12,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:39:12,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:39:12,439 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 281 flow. Second operand 4 states and 796 transitions. [2023-08-29 23:39:12,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 538 flow [2023-08-29 23:39:12,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 90 transitions, 513 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-29 23:39:12,441 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 285 flow [2023-08-29 23:39:12,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2023-08-29 23:39:12,441 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2023-08-29 23:39:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 285 flow [2023-08-29 23:39:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 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) [2023-08-29 23:39:12,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:12,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:39:12,452 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 [2023-08-29 23:39:12,649 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 [2023-08-29 23:39:12,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -714909148, now seen corresponding path program 1 times [2023-08-29 23:39:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817370657] [2023-08-29 23:39:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:12,650 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 [2023-08-29 23:39:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:12,651 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) [2023-08-29 23:39:12,652 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 [2023-08-29 23:39:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:39:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:12,851 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-29 23:39:12,852 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 5 case distinctions, treesize of input 36 treesize of output 51 [2023-08-29 23:39:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:13,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:13,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817370657] [2023-08-29 23:39:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817370657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:13,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:39:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737836048] [2023-08-29 23:39:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:13,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:39:13,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:39:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:39:13,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-29 23:39:13,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2023-08-29 23:39:13,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:13,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-29 23:39:13,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:16,951 INFO L130 PetriNetUnfolder]: 37536/49975 cut-off events. [2023-08-29 23:39:16,951 INFO L131 PetriNetUnfolder]: For 13401/13401 co-relation queries the response was YES. [2023-08-29 23:39:17,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118255 conditions, 49975 events. 37536/49975 cut-off events. For 13401/13401 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 262809 event pairs, 26464 based on Foata normal form. 0/38824 useless extension candidates. Maximal degree in co-relation 118226. Up to 49975 conditions per place. [2023-08-29 23:39:17,350 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-29 23:39:17,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 397 flow [2023-08-29 23:39:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:39:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:39:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-08-29 23:39:17,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064633260711693 [2023-08-29 23:39:17,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-08-29 23:39:17,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-08-29 23:39:17,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:17,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-08-29 23:39:17,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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) [2023-08-29 23:39:17,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:39:17,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:39:17,369 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 285 flow. Second operand 3 states and 593 transitions. [2023-08-29 23:39:17,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 397 flow [2023-08-29 23:39:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 387 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 23:39:17,386 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 273 flow [2023-08-29 23:39:17,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2023-08-29 23:39:17,386 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-08-29 23:39:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 273 flow [2023-08-29 23:39:17,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2023-08-29 23:39:17,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:17,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:39:17,394 INFO L552 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)] Ended with exit code 0 [2023-08-29 23:39:17,587 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 [2023-08-29 23:39:17,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:17,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash -714909146, now seen corresponding path program 1 times [2023-08-29 23:39:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784475595] [2023-08-29 23:39:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:17,588 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 [2023-08-29 23:39:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:17,598 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) [2023-08-29 23:39:17,598 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 [2023-08-29 23:39:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:39:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:39:17,807 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 23:39:17,808 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-29 23:39:17,822 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 18 treesize of output 16 [2023-08-29 23:39:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:17,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:17,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:17,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784475595] [2023-08-29 23:39:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784475595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:17,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:17,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:39:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858896848] [2023-08-29 23:39:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:39:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:39:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:39:18,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-29 23:39:18,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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) [2023-08-29 23:39:18,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:18,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-29 23:39:18,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:21,744 INFO L130 PetriNetUnfolder]: 36584/48542 cut-off events. [2023-08-29 23:39:21,744 INFO L131 PetriNetUnfolder]: For 13106/13106 co-relation queries the response was YES. [2023-08-29 23:39:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115025 conditions, 48542 events. 36584/48542 cut-off events. For 13106/13106 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 252518 event pairs, 25764 based on Foata normal form. 0/38094 useless extension candidates. Maximal degree in co-relation 114996. Up to 48542 conditions per place. [2023-08-29 23:39:22,024 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-29 23:39:22,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 56 transitions, 381 flow [2023-08-29 23:39:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:39:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:39:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-29 23:39:22,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-29 23:39:22,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-29 23:39:22,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-29 23:39:22,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:22,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-29 23:39:22,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2023-08-29 23:39:22,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:39:22,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:39:22,037 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 273 flow. Second operand 3 states and 597 transitions. [2023-08-29 23:39:22,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 56 transitions, 381 flow [2023-08-29 23:39:22,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:22,040 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 270 flow [2023-08-29 23:39:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-08-29 23:39:22,041 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-29 23:39:22,041 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 270 flow [2023-08-29 23:39:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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) [2023-08-29 23:39:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:22,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:39:22,072 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 [2023-08-29 23:39:22,249 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 [2023-08-29 23:39:22,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:22,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1198231873, now seen corresponding path program 1 times [2023-08-29 23:39:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637434953] [2023-08-29 23:39:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:22,251 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 [2023-08-29 23:39:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:22,253 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) [2023-08-29 23:39:22,254 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 [2023-08-29 23:39:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:39:22,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:22,453 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:39:22,454 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:39:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:22,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:39:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:22,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637434953] [2023-08-29 23:39:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637434953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:39:22,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:39:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:39:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903920551] [2023-08-29 23:39:22,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:39:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:39:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:39:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:39:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-08-29 23:39:25,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 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) [2023-08-29 23:39:25,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:25,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-08-29 23:39:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:29,663 INFO L130 PetriNetUnfolder]: 33254/44226 cut-off events. [2023-08-29 23:39:29,663 INFO L131 PetriNetUnfolder]: For 12598/12598 co-relation queries the response was YES. [2023-08-29 23:39:29,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104570 conditions, 44226 events. 33254/44226 cut-off events. For 12598/12598 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 229071 event pairs, 23504 based on Foata normal form. 234/34986 useless extension candidates. Maximal degree in co-relation 104540. Up to 42684 conditions per place. [2023-08-29 23:39:29,882 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 107 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2023-08-29 23:39:29,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 639 flow [2023-08-29 23:39:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:39:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:39:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2023-08-29 23:39:29,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41083099906629317 [2023-08-29 23:39:29,886 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2023-08-29 23:39:29,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2023-08-29 23:39:29,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:29,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2023-08-29 23:39:29,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 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) [2023-08-29 23:39:29,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:39:29,891 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:39:29,891 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 270 flow. Second operand 7 states and 1320 transitions. [2023-08-29 23:39:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 639 flow [2023-08-29 23:39:29,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:39:29,894 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 302 flow [2023-08-29 23:39:29,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2023-08-29 23:39:29,895 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2023-08-29 23:39:29,895 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 302 flow [2023-08-29 23:39:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 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) [2023-08-29 23:39:29,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:29,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-29 23:39:29,905 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 [2023-08-29 23:39:30,102 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 [2023-08-29 23:39:30,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:30,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash 999597029, now seen corresponding path program 2 times [2023-08-29 23:39:30,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343389662] [2023-08-29 23:39:30,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:39:30,104 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 [2023-08-29 23:39:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:30,105 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) [2023-08-29 23:39:30,107 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 [2023-08-29 23:39:30,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:39:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:39:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-29 23:39:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:30,350 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-29 23:39:30,350 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-29 23:39:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:30,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:39:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:31,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343389662] [2023-08-29 23:39:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343389662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:39:31,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:39:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:39:31,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748691664] [2023-08-29 23:39:31,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:39:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:39:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:39:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:39:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 459 [2023-08-29 23:39:33,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 302 flow. Second operand has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 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) [2023-08-29 23:39:33,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:33,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 459 [2023-08-29 23:39:33,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:45,342 INFO L130 PetriNetUnfolder]: 76358/101354 cut-off events. [2023-08-29 23:39:45,342 INFO L131 PetriNetUnfolder]: For 22972/22972 co-relation queries the response was YES. [2023-08-29 23:39:45,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235629 conditions, 101354 events. 76358/101354 cut-off events. For 22972/22972 co-relation queries the response was YES. Maximal size of possible extension queue 2237. Compared 593349 event pairs, 6224 based on Foata normal form. 8/84240 useless extension candidates. Maximal degree in co-relation 235596. Up to 35331 conditions per place. [2023-08-29 23:39:46,251 INFO L137 encePairwiseOnDemand]: 451/459 looper letters, 220 selfloop transitions, 19 changer transitions 1/240 dead transitions. [2023-08-29 23:39:46,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 240 transitions, 1224 flow [2023-08-29 23:39:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:39:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:39:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2161 transitions. [2023-08-29 23:39:46,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42800554565260446 [2023-08-29 23:39:46,256 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2161 transitions. [2023-08-29 23:39:46,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2161 transitions. [2023-08-29 23:39:46,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:46,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2161 transitions. [2023-08-29 23:39:46,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.45454545454547) internal successors, (2161), 11 states have internal predecessors, (2161), 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) [2023-08-29 23:39:46,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 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) [2023-08-29 23:39:46,263 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 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) [2023-08-29 23:39:46,263 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 302 flow. Second operand 11 states and 2161 transitions. [2023-08-29 23:39:46,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 240 transitions, 1224 flow [2023-08-29 23:39:46,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 240 transitions, 1207 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-29 23:39:46,272 INFO L231 Difference]: Finished difference. Result has 97 places, 65 transitions, 402 flow [2023-08-29 23:39:46,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=402, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2023-08-29 23:39:46,273 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-08-29 23:39:46,273 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 402 flow [2023-08-29 23:39:46,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 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) [2023-08-29 23:39:46,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:46,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:39:46,281 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 [2023-08-29 23:39:46,478 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 [2023-08-29 23:39:46,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:39:46,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash 167104997, now seen corresponding path program 1 times [2023-08-29 23:39:46,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:39:46,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427483437] [2023-08-29 23:39:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:46,479 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 [2023-08-29 23:39:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:39:46,480 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) [2023-08-29 23:39:46,482 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 [2023-08-29 23:39:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:39:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:46,699 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-29 23:39:46,700 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-29 23:39:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:46,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:39:46,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:39:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427483437] [2023-08-29 23:39:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427483437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:39:46,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:39:46,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:39:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771250720] [2023-08-29 23:39:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:39:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:39:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:39:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:39:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:39:46,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-29 23:39:46,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 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) [2023-08-29 23:39:46,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:46,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-29 23:39:46,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:58,873 INFO L130 PetriNetUnfolder]: 99380/131928 cut-off events. [2023-08-29 23:39:58,873 INFO L131 PetriNetUnfolder]: For 157148/157148 co-relation queries the response was YES. [2023-08-29 23:39:59,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354198 conditions, 131928 events. 99380/131928 cut-off events. For 157148/157148 co-relation queries the response was YES. Maximal size of possible extension queue 2823. Compared 793207 event pairs, 17618 based on Foata normal form. 0/116740 useless extension candidates. Maximal degree in co-relation 354160. Up to 104035 conditions per place. [2023-08-29 23:40:00,002 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 93 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-08-29 23:40:00,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 783 flow [2023-08-29 23:40:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:40:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:40:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 785 transitions. [2023-08-29 23:40:00,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275599128540305 [2023-08-29 23:40:00,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 785 transitions. [2023-08-29 23:40:00,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 785 transitions. [2023-08-29 23:40:00,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:00,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 785 transitions. [2023-08-29 23:40:00,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 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) [2023-08-29 23:40:00,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:40:00,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 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) [2023-08-29 23:40:00,010 INFO L175 Difference]: Start difference. First operand has 97 places, 65 transitions, 402 flow. Second operand 4 states and 785 transitions. [2023-08-29 23:40:00,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 783 flow [2023-08-29 23:40:00,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 723 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-29 23:40:00,160 INFO L231 Difference]: Finished difference. Result has 94 places, 67 transitions, 402 flow [2023-08-29 23:40:00,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=94, PETRI_TRANSITIONS=67} [2023-08-29 23:40:00,161 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2023-08-29 23:40:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 67 transitions, 402 flow [2023-08-29 23:40:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 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) [2023-08-29 23:40:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:00,169 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 [2023-08-29 23:40:00,366 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 [2023-08-29 23:40:00,366 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:40:00,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash 167105029, now seen corresponding path program 1 times [2023-08-29 23:40:00,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:00,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133632606] [2023-08-29 23:40:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:00,367 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 [2023-08-29 23:40:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:00,368 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) [2023-08-29 23:40:00,370 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 [2023-08-29 23:40:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:00,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:40:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:00,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:00,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:40:00,568 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 23:40:00,568 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-29 23:40:00,574 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 22 treesize of output 20 [2023-08-29 23:40:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:00,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:00,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:00,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133632606] [2023-08-29 23:40:00,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133632606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:00,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:00,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118326145] [2023-08-29 23:40:00,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:00,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:00,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-29 23:40:00,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 67 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-08-29 23:40:00,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:00,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-29 23:40:00,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:11,815 INFO L130 PetriNetUnfolder]: 92449/122509 cut-off events. [2023-08-29 23:40:11,815 INFO L131 PetriNetUnfolder]: For 119702/119702 co-relation queries the response was YES. [2023-08-29 23:40:12,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347401 conditions, 122509 events. 92449/122509 cut-off events. For 119702/119702 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 710003 event pairs, 65557 based on Foata normal form. 0/120021 useless extension candidates. Maximal degree in co-relation 347365. Up to 122509 conditions per place. [2023-08-29 23:40:12,885 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-29 23:40:12,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 65 transitions, 528 flow [2023-08-29 23:40:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-29 23:40:12,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-29 23:40:12,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-29 23:40:12,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-29 23:40:12,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:12,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-29 23:40:12,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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) [2023-08-29 23:40:12,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:40:12,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:40:12,890 INFO L175 Difference]: Start difference. First operand has 94 places, 67 transitions, 402 flow. Second operand 3 states and 595 transitions. [2023-08-29 23:40:12,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 65 transitions, 528 flow [2023-08-29 23:40:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 65 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:40:13,084 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 390 flow [2023-08-29 23:40:13,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=390, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2023-08-29 23:40:13,085 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 26 predicate places. [2023-08-29 23:40:13,085 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 390 flow [2023-08-29 23:40:13,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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) [2023-08-29 23:40:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:13,094 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 [2023-08-29 23:40:13,289 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 [2023-08-29 23:40:13,290 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:40:13,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash 167105028, now seen corresponding path program 1 times [2023-08-29 23:40:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:13,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671375485] [2023-08-29 23:40:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:13,291 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 [2023-08-29 23:40:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:13,292 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) [2023-08-29 23:40:13,294 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 [2023-08-29 23:40:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:40:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:13,461 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-29 23:40:13,461 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 4 case distinctions, treesize of input 18 treesize of output 36 [2023-08-29 23:40:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:13,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:40:13,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671375485] [2023-08-29 23:40:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671375485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:40:13,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:40:13,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:40:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093158254] [2023-08-29 23:40:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:40:13,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:40:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:40:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:40:13,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 459 [2023-08-29 23:40:13,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-08-29 23:40:13,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:13,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 459 [2023-08-29 23:40:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:23,495 INFO L130 PetriNetUnfolder]: 85518/113090 cut-off events. [2023-08-29 23:40:23,495 INFO L131 PetriNetUnfolder]: For 108690/108690 co-relation queries the response was YES. [2023-08-29 23:40:24,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316179 conditions, 113090 events. 85518/113090 cut-off events. For 108690/108690 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 648387 event pairs, 60184 based on Foata normal form. 0/113090 useless extension candidates. Maximal degree in co-relation 316143. Up to 113090 conditions per place. [2023-08-29 23:40:24,469 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-29 23:40:24,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 63 transitions, 512 flow [2023-08-29 23:40:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:40:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:40:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-29 23:40:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-29 23:40:24,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-29 23:40:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-29 23:40:24,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:24,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-29 23:40:24,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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) [2023-08-29 23:40:24,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:40:24,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 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) [2023-08-29 23:40:24,475 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 390 flow. Second operand 3 states and 578 transitions. [2023-08-29 23:40:24,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 63 transitions, 512 flow [2023-08-29 23:40:24,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 63 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:24,875 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 387 flow [2023-08-29 23:40:24,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2023-08-29 23:40:24,876 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2023-08-29 23:40:24,876 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 387 flow [2023-08-29 23:40:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-08-29 23:40:24,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:24,883 INFO L552 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)] Ended with exit code 0 [2023-08-29 23:40:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /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 [2023-08-29 23:40:25,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:40:25,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 418533457, now seen corresponding path program 1 times [2023-08-29 23:40:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:25,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341848294] [2023-08-29 23:40:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:25,085 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 [2023-08-29 23:40:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:25,085 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2023-08-29 23:40:25,088 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 (20)] Waiting until timeout for monitored process [2023-08-29 23:40:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:40:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:25,310 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:40:25,310 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:40:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:25,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:25,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341848294] [2023-08-29 23:40:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341848294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:25,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:40:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391882193] [2023-08-29 23:40:25,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:25,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:40:25,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:40:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:40:27,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-08-29 23:40:27,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 387 flow. Second operand has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 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) [2023-08-29 23:40:27,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:27,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-08-29 23:40:27,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:37,832 INFO L130 PetriNetUnfolder]: 84836/112142 cut-off events. [2023-08-29 23:40:37,833 INFO L131 PetriNetUnfolder]: For 116657/116657 co-relation queries the response was YES. [2023-08-29 23:40:38,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313767 conditions, 112142 events. 84836/112142 cut-off events. For 116657/116657 co-relation queries the response was YES. Maximal size of possible extension queue 2491. Compared 633434 event pairs, 59682 based on Foata normal form. 66/112208 useless extension candidates. Maximal degree in co-relation 313730. Up to 111724 conditions per place. [2023-08-29 23:40:38,806 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 97 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-08-29 23:40:38,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 103 transitions, 701 flow [2023-08-29 23:40:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:40:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:40:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1300 transitions. [2023-08-29 23:40:38,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046062869592281 [2023-08-29 23:40:38,810 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1300 transitions. [2023-08-29 23:40:38,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1300 transitions. [2023-08-29 23:40:38,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:38,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1300 transitions. [2023-08-29 23:40:38,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 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) [2023-08-29 23:40:38,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:40:38,814 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:40:38,814 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 387 flow. Second operand 7 states and 1300 transitions. [2023-08-29 23:40:38,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 103 transitions, 701 flow [2023-08-29 23:40:38,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:40:38,902 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 403 flow [2023-08-29 23:40:38,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-08-29 23:40:38,902 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-08-29 23:40:38,903 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 403 flow [2023-08-29 23:40:38,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 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) [2023-08-29 23:40:38,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:38,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:38,911 INFO L552 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 (20)] Ended with exit code 0 [2023-08-29 23:40:39,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /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 [2023-08-29 23:40:39,109 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:40:39,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 149389943, now seen corresponding path program 2 times [2023-08-29 23:40:39,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:40:39,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72583831] [2023-08-29 23:40:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:40:39,110 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 [2023-08-29 23:40:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:40:39,114 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2023-08-29 23:40:39,115 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 (21)] Waiting until timeout for monitored process [2023-08-29 23:40:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:40:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:40:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 23:40:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:39,384 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-29 23:40:39,384 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-29 23:40:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:40:39,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:40:40,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:40:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72583831] [2023-08-29 23:40:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72583831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:40,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:40:40,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:40:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882103431] [2023-08-29 23:40:40,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:40,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:40:40,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:40:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:40:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:40:41,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-08-29 23:40:41,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 403 flow. Second operand has 8 states, 8 states have (on average 180.75) internal successors, (1446), 8 states have internal predecessors, (1446), 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) [2023-08-29 23:40:41,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:41,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-08-29 23:40:41,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:07,781 INFO L130 PetriNetUnfolder]: 195364/257606 cut-off events. [2023-08-29 23:41:07,782 INFO L131 PetriNetUnfolder]: For 261023/261023 co-relation queries the response was YES. [2023-08-29 23:41:09,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718862 conditions, 257606 events. 195364/257606 cut-off events. For 261023/261023 co-relation queries the response was YES. Maximal size of possible extension queue 4651. Compared 1584433 event pairs, 14514 based on Foata normal form. 21456/279062 useless extension candidates. Maximal degree in co-relation 718823. Up to 91813 conditions per place. [2023-08-29 23:41:10,189 INFO L137 encePairwiseOnDemand]: 452/459 looper letters, 178 selfloop transitions, 21 changer transitions 0/199 dead transitions. [2023-08-29 23:41:10,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 199 transitions, 1421 flow [2023-08-29 23:41:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:41:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:41:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1386 transitions. [2023-08-29 23:41:10,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2023-08-29 23:41:10,193 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1386 transitions. [2023-08-29 23:41:10,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1386 transitions. [2023-08-29 23:41:10,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:10,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1386 transitions. [2023-08-29 23:41:10,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2023-08-29 23:41:10,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:41:10,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 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) [2023-08-29 23:41:10,197 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 403 flow. Second operand 7 states and 1386 transitions. [2023-08-29 23:41:10,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 199 transitions, 1421 flow [2023-08-29 23:41:10,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 199 transitions, 1412 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:41:10,674 INFO L231 Difference]: Finished difference. Result has 104 places, 75 transitions, 573 flow [2023-08-29 23:41:10,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=104, PETRI_TRANSITIONS=75} [2023-08-29 23:41:10,675 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 38 predicate places. [2023-08-29 23:41:10,675 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 75 transitions, 573 flow [2023-08-29 23:41:10,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.75) internal successors, (1446), 8 states have internal predecessors, (1446), 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) [2023-08-29 23:41:10,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:10,676 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:41:10,686 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 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /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 [2023-08-29 23:41:10,887 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 23:41:10,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2139267543, now seen corresponding path program 3 times [2023-08-29 23:41:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:41:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625541580] [2023-08-29 23:41:10,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:41:10,888 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 [2023-08-29 23:41:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:41:10,889 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2023-08-29 23:41:10,890 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 (22)] Waiting until timeout for monitored process [2023-08-29 23:41:11,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:41:11,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:41:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:41:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:11,203 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:41:11,204 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:41:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:11,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:13,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:41:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625541580] [2023-08-29 23:41:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625541580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:13,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:41:13,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:41:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764190951] [2023-08-29 23:41:13,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:13,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:41:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:41:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:41:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:41:25,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-29 23:41:25,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 75 transitions, 573 flow. Second operand has 24 states, 24 states have (on average 180.0) internal successors, (4320), 24 states have internal predecessors, (4320), 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) [2023-08-29 23:41:25,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:25,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-29 23:41:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand