./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.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/popl20-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --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 [2023-08-30 00:09:21,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:09:21,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:09:21,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:09:21,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:09:21,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:09:21,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:09:21,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:09:21,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:09:21,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:09:21,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:09:21,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:09:21,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:09:21,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:09:21,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:09:21,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:09:21,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:09:21,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:09:21,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:09:21,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:09:21,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:09:21,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:09:21,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:09:21,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:09:21,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:09:21,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:09:21,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:09:21,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:09:21,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:09:21,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:09:21,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:09:21,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:09:21,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:09:21,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:09:21,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:09:21,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:09:21,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:09:21,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:09:21,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:09:21,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:09:21,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:09:21,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:09:21,593 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:09:21,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:09:21,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:09:21,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:09:21,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:09:21,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:09:21,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:09:21,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:09:21,600 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:09:21,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:09:21,602 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:09:21,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:09:21,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:09:21,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:09:21,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:09:21,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:09:21,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:09:21,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:09:21,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:09:21,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:09:21,604 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:09:21,604 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:09:21,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:09:21,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:09:21,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:09:21,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:09:21,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:09:21,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:09:21,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:09:21,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:09:21,606 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:09:21,606 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:09:21,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:09:21,607 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:09:21,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:09:21,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:09:21,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:09:21,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:09:21,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:09:21,964 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:09:21,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 00:09:23,109 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:09:23,321 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:09:23,322 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 00:09:23,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee745d8a/fd9591509a914d5d8cc8e11ff8e1fb49/FLAG6f4e055b0 [2023-08-30 00:09:23,338 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee745d8a/fd9591509a914d5d8cc8e11ff8e1fb49 [2023-08-30 00:09:23,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:09:23,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:09:23,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:09:23,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:09:23,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:09:23,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:09:23" (1/1) ... [2023-08-30 00:09:23,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ca387e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:23, skipping insertion in model container [2023-08-30 00:09:23,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:09:23" (1/1) ... [2023-08-30 00:09:23,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:09:23,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:09:23,515 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/popl20-min-max-dec.wvr.c[3019,3032] [2023-08-30 00:09:23,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:09:23,532 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) [2023-08-30 00:09:23,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41eda5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:23, skipping insertion in model container [2023-08-30 00:09:23,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:09:23,533 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:09:23,535 INFO L158 Benchmark]: Toolchain (without parser) took 192.95ms. Allocated memory is still 73.4MB. Free memory was 51.4MB in the beginning and 41.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:09:23,535 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:09:23,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.11ms. Allocated memory is still 73.4MB. Free memory was 51.1MB in the beginning and 41.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:09:23,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.11ms. Allocated memory is still 73.4MB. Free memory was 51.1MB in the beginning and 41.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --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 [2023-08-30 00:09:25,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:09:25,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:09:25,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:09:25,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:09:25,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:09:25,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:09:25,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:09:25,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:09:25,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:09:25,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:09:25,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:09:25,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:09:25,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:09:25,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:09:25,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:09:25,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:09:25,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:09:25,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:09:25,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:09:25,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:09:25,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:09:25,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:09:25,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:09:25,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:09:25,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:09:25,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:09:25,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:09:25,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:09:25,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:09:25,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:09:25,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:09:25,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:09:25,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:09:25,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:09:25,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:09:25,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:09:25,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:09:25,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:09:25,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:09:25,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:09:25,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:09:25,399 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:09:25,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:09:25,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:09:25,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:09:25,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:09:25,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:09:25,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:09:25,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:09:25,403 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:09:25,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:09:25,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:09:25,404 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:09:25,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:09:25,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:09:25,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:09:25,405 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:09:25,405 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:09:25,406 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:09:25,407 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:09:25,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:09:25,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:09:25,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:09:25,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:09:25,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:09:25,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:09:25,408 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:09:25,408 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:09:25,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:09:25,409 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:09:25,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:09:25,409 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:09:25,409 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:09:25,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:09:25,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:09:25,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:09:25,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:09:25,741 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:09:25,742 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:09:25,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 00:09:26,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:09:27,146 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:09:27,146 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2023-08-30 00:09:27,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911b4b8d5/d845b7ac9138452e9784e974119c5417/FLAGd6b5f676b [2023-08-30 00:09:27,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911b4b8d5/d845b7ac9138452e9784e974119c5417 [2023-08-30 00:09:27,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:09:27,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:09:27,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:09:27,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:09:27,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:09:27,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b24d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27, skipping insertion in model container [2023-08-30 00:09:27,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:09:27,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:09:27,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2023-08-30 00:09:27,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:09:27,365 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:09:27,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:09:27,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2023-08-30 00:09:27,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:09:27,403 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:09:27,436 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2023-08-30 00:09:27,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:09:27,465 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:09:27,467 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:09:27,473 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:09:27,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27 WrapperNode [2023-08-30 00:09:27,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:09:27,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:09:27,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:09:27,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:09:27,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,540 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2023-08-30 00:09:27,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:09:27,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:09:27,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:09:27,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:09:27,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:09:27,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:09:27,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:09:27,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:09:27,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (1/1) ... [2023-08-30 00:09:27,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:09:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:09:27,646 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) [2023-08-30 00:09:27,672 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 [2023-08-30 00:09:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:09:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:09:27,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:09:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:09:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:09:27,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:09:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:09:27,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:09:27,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:09:27,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:09:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:09:27,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:09:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:09:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:09:27,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:09:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:09:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:09:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:09:27,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:09:27,691 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:09:27,829 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:09:27,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:09:28,399 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:09:28,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:09:28,545 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:09:28,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:09:28 BoogieIcfgContainer [2023-08-30 00:09:28,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:09:28,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:09:28,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:09:28,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:09:28,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:09:27" (1/3) ... [2023-08-30 00:09:28,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c19ff0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:09:28, skipping insertion in model container [2023-08-30 00:09:28,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:09:27" (2/3) ... [2023-08-30 00:09:28,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c19ff0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:09:28, skipping insertion in model container [2023-08-30 00:09:28,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:09:28" (3/3) ... [2023-08-30 00:09:28,556 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2023-08-30 00:09:28,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:09:28,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 00:09:28,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:09:28,678 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:09:28,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 00:09:28,813 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2023-08-30 00:09:28,813 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:09:28,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 196 events. 12/196 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 00:09:28,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 00:09:28,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 192 transitions, 408 flow [2023-08-30 00:09:28,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:09:28,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 00:09:28,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 00:09:28,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 192 transitions, 408 flow [2023-08-30 00:09:28,887 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2023-08-30 00:09:28,888 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:09:28,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 12/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 00:09:28,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2023-08-30 00:09:46,783 INFO L134 LiptonReduction]: Checked pairs total: 8115 [2023-08-30 00:09:46,787 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 00:09:46,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:09:46,811 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;@7ccced4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:09:46,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-30 00:09:46,815 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:09:46,816 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:09:46,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:09:46,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:46,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 26204, now seen corresponding path program 1 times [2023-08-30 00:09:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989876983] [2023-08-30 00:09:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:46,839 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 [2023-08-30 00:09:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:46,842 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) [2023-08-30 00:09:46,844 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 [2023-08-30 00:09:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:09:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:47,301 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:09:47,302 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 [2023-08-30 00:09:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:47,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:47,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989876983] [2023-08-30 00:09:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989876983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:47,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554267379] [2023-08-30 00:09:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:47,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-08-30 00:09:47,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:47,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:47,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-08-30 00:09:47,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:50,698 INFO L130 PetriNetUnfolder]: 18239/23498 cut-off events. [2023-08-30 00:09:50,698 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2023-08-30 00:09:50,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47992 conditions, 23498 events. 18239/23498 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 122413 event pairs, 12836 based on Foata normal form. 0/10355 useless extension candidates. Maximal degree in co-relation 21660. Up to 11727 conditions per place. [2023-08-30 00:09:50,875 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 104 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-30 00:09:50,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 482 flow [2023-08-30 00:09:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 00:09:50,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-08-30 00:09:50,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 00:09:50,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 00:09:50,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:50,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 00:09:50,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:50,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:50,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:50,913 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 620 transitions. [2023-08-30 00:09:50,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 482 flow [2023-08-30 00:09:50,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:09:50,975 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 138 flow [2023-08-30 00:09:50,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-30 00:09:50,980 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 00:09:50,981 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 138 flow [2023-08-30 00:09:50,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:50,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:50,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:09:50,995 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 [2023-08-30 00:09:51,191 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 [2023-08-30 00:09:51,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:51,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 26255, now seen corresponding path program 1 times [2023-08-30 00:09:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:51,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323906178] [2023-08-30 00:09:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:51,193 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 [2023-08-30 00:09:51,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:51,195 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) [2023-08-30 00:09:51,199 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 [2023-08-30 00:09:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:09:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:51,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:51,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:51,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323906178] [2023-08-30 00:09:51,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323906178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:51,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:51,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079825666] [2023-08-30 00:09:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:51,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2023-08-30 00:09:51,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:51,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:51,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2023-08-30 00:09:51,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:52,370 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2023-08-30 00:09:52,370 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:09:52,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 11752 events. 9120/11752 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56085 event pairs, 6418 based on Foata normal form. 0/5172 useless extension candidates. Maximal degree in co-relation 23699. Up to 11727 conditions per place. [2023-08-30 00:09:52,449 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 00:09:52,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 252 flow [2023-08-30 00:09:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-30 00:09:52,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835069444444444 [2023-08-30 00:09:52,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-30 00:09:52,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-30 00:09:52,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:52,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-30 00:09:52,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-30 00:09:52,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:52,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:52,458 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 557 transitions. [2023-08-30 00:09:52,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 252 flow [2023-08-30 00:09:52,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:52,460 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-08-30 00:09:52,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 00:09:52,461 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 00:09:52,461 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-08-30 00:09:52,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:52,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:52,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:09:52,474 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 [2023-08-30 00:09:52,671 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 [2023-08-30 00:09:52,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:52,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 26202, now seen corresponding path program 1 times [2023-08-30 00:09:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:52,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242723437] [2023-08-30 00:09:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:52,673 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 [2023-08-30 00:09:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:52,674 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) [2023-08-30 00:09:52,677 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 [2023-08-30 00:09:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:52,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:09:52,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:52,873 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:09:52,874 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 [2023-08-30 00:09:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:52,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:52,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:52,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242723437] [2023-08-30 00:09:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242723437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:52,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:52,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105314144] [2023-08-30 00:09:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:52,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:53,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:09:53,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:53,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:53,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:09:53,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:54,058 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2023-08-30 00:09:54,059 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:09:54,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23714 conditions, 11750 events. 9120/11750 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56221 event pairs, 6418 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 23700. Up to 11726 conditions per place. [2023-08-30 00:09:54,138 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:09:54,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 254 flow [2023-08-30 00:09:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-30 00:09:54,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 00:09:54,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-30 00:09:54,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-30 00:09:54,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:54,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-30 00:09:54,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:54,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:54,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:54,147 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 540 transitions. [2023-08-30 00:09:54,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 254 flow [2023-08-30 00:09:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:09:54,150 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 142 flow [2023-08-30 00:09:54,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-30 00:09:54,151 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-08-30 00:09:54,151 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 142 flow [2023-08-30 00:09:54,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:54,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:54,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:09:54,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:09:54,361 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 [2023-08-30 00:09:54,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:54,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash 814740, now seen corresponding path program 1 times [2023-08-30 00:09:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221795974] [2023-08-30 00:09:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:54,363 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 [2023-08-30 00:09:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:54,364 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) [2023-08-30 00:09:54,367 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 [2023-08-30 00:09:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:09:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:54,578 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-08-30 00:09:54,579 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 [2023-08-30 00:09:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:09:54,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:54,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221795974] [2023-08-30 00:09:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221795974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:54,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:54,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:54,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477792615] [2023-08-30 00:09:54,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:54,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:09:54,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:54,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:54,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:09:54,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:55,710 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2023-08-30 00:09:55,711 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:09:55,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 9913 events. 7644/9913 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 46761 event pairs, 5350 based on Foata normal form. 0/4487 useless extension candidates. Maximal degree in co-relation 20028. Up to 9889 conditions per place. [2023-08-30 00:09:55,763 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 00:09:55,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 240 flow [2023-08-30 00:09:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 00:09:55,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678819444444444 [2023-08-30 00:09:55,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 00:09:55,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 00:09:55,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:55,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 00:09:55,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:55,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:55,771 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-08-30 00:09:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 240 flow [2023-08-30 00:09:55,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:55,773 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2023-08-30 00:09:55,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-30 00:09:55,774 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 00:09:55,775 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2023-08-30 00:09:55,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:55,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:55,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:09:55,786 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 [2023-08-30 00:09:55,984 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 [2023-08-30 00:09:55,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:55,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 814739, now seen corresponding path program 1 times [2023-08-30 00:09:55,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:55,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775520651] [2023-08-30 00:09:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:55,985 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 [2023-08-30 00:09:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:55,986 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) [2023-08-30 00:09:55,988 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 [2023-08-30 00:09:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:09:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:09:56,263 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 00:09:56,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 00:09:56,318 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 00:09:56,319 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 89 treesize of output 88 [2023-08-30 00:09:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:09:56,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:09:56,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775520651] [2023-08-30 00:09:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775520651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:09:56,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:09:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:09:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862981138] [2023-08-30 00:09:56,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:09:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:09:56,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:09:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:09:56,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-08-30 00:09:56,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:56,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:56,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-08-30 00:09:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:09:57,238 INFO L130 PetriNetUnfolder]: 6168/8076 cut-off events. [2023-08-30 00:09:57,239 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:09:57,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 8076 events. 6168/8076 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 37791 event pairs, 4282 based on Foata normal form. 0/3803 useless extension candidates. Maximal degree in co-relation 16353. Up to 8052 conditions per place. [2023-08-30 00:09:57,285 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 49 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:09:57,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 231 flow [2023-08-30 00:09:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:09:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:09:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-30 00:09:57,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2023-08-30 00:09:57,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-30 00:09:57,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-30 00:09:57,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:09:57,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-30 00:09:57,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,294 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 3 states and 543 transitions. [2023-08-30 00:09:57,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 231 flow [2023-08-30 00:09:57,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:09:57,296 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-08-30 00:09:57,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=132, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-30 00:09:57,297 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-08-30 00:09:57,297 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-08-30 00:09:57,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:57,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:09:57,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:09:57,309 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 [2023-08-30 00:09:57,507 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 [2023-08-30 00:09:57,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:09:57,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:09:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash 814689, now seen corresponding path program 1 times [2023-08-30 00:09:57,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:09:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407919952] [2023-08-30 00:09:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:09:57,509 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 [2023-08-30 00:09:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:09:57,511 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) [2023-08-30 00:09:57,512 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 [2023-08-30 00:09:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:09:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:09:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:09:57,722 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:09:57,722 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 [2023-08-30 00:09:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:57,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:09:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:09:58,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:09:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407919952] [2023-08-30 00:09:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407919952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:09:58,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:09:58,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:09:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693675243] [2023-08-30 00:09:58,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:09:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:09:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:09:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:09:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:09:58,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 00:09:58,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:09:58,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:09:58,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 00:09:58,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:00,232 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2023-08-30 00:10:00,232 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 00:10:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32723 conditions, 16153 events. 12337/16153 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 82373 event pairs, 8564 based on Foata normal form. 0/7626 useless extension candidates. Maximal degree in co-relation 32712. Up to 8051 conditions per place. [2023-08-30 00:10:00,292 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 94 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2023-08-30 00:10:00,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 456 flow [2023-08-30 00:10:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:10:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:10:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1046 transitions. [2023-08-30 00:10:00,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539930555555556 [2023-08-30 00:10:00,297 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1046 transitions. [2023-08-30 00:10:00,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1046 transitions. [2023-08-30 00:10:00,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:00,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1046 transitions. [2023-08-30 00:10:00,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:00,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:00,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:00,305 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 6 states and 1046 transitions. [2023-08-30 00:10:00,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 456 flow [2023-08-30 00:10:00,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:10:00,307 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 189 flow [2023-08-30 00:10:00,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-08-30 00:10:00,308 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 00:10:00,308 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 189 flow [2023-08-30 00:10:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:00,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:00,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:10:00,324 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 [2023-08-30 00:10:00,523 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 [2023-08-30 00:10:00,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:00,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 782982615, now seen corresponding path program 1 times [2023-08-30 00:10:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613484531] [2023-08-30 00:10:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:00,525 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 [2023-08-30 00:10:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:00,526 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) [2023-08-30 00:10:00,529 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 [2023-08-30 00:10:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:10:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:00,721 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-08-30 00:10:00,722 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 [2023-08-30 00:10:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:00,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:00,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613484531] [2023-08-30 00:10:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613484531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:00,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:00,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:10:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706855227] [2023-08-30 00:10:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:00,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:10:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:10:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:10:01,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:10:01,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:01,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:01,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:10:01,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:02,007 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2023-08-30 00:10:02,007 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 00:10:02,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31715 conditions, 15637 events. 11953/15637 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 79777 event pairs, 8298 based on Foata normal form. 0/7435 useless extension candidates. Maximal degree in co-relation 31699. Up to 15589 conditions per place. [2023-08-30 00:10:02,058 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 00:10:02,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 291 flow [2023-08-30 00:10:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:10:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:10:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 00:10:02,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-08-30 00:10:02,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 00:10:02,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 00:10:02,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:02,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 00:10:02,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:02,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:02,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:02,063 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 189 flow. Second operand 3 states and 535 transitions. [2023-08-30 00:10:02,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 291 flow [2023-08-30 00:10:02,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:10:02,065 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 173 flow [2023-08-30 00:10:02,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=173, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 00:10:02,066 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2023-08-30 00:10:02,066 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 173 flow [2023-08-30 00:10:02,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:02,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:02,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:10:02,078 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 [2023-08-30 00:10:02,276 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 [2023-08-30 00:10:02,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:02,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash 782982613, now seen corresponding path program 1 times [2023-08-30 00:10:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110459049] [2023-08-30 00:10:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:10:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:02,278 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) [2023-08-30 00:10:02,284 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 [2023-08-30 00:10:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:10:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:02,536 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 00:10:02,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 00:10:02,553 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:10:02,554 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 [2023-08-30 00:10:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:03,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110459049] [2023-08-30 00:10:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110459049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:03,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:10:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779417425] [2023-08-30 00:10:03,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:03,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:10:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:10:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:10:05,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:10:06,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 384 [2023-08-30 00:10:06,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:06,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:06,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 384 [2023-08-30 00:10:06,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:07,466 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2023-08-30 00:10:07,467 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 00:10:07,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 15121 events. 11569/15121 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 76800 event pairs, 8032 based on Foata normal form. 0/7279 useless extension candidates. Maximal degree in co-relation 30661. Up to 7539 conditions per place. [2023-08-30 00:10:07,527 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 90 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-30 00:10:07,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 453 flow [2023-08-30 00:10:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:10:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:10:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 853 transitions. [2023-08-30 00:10:07,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44427083333333334 [2023-08-30 00:10:07,530 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 853 transitions. [2023-08-30 00:10:07,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 853 transitions. [2023-08-30 00:10:07,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:07,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 853 transitions. [2023-08-30 00:10:07,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.6) internal successors, (853), 5 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:07,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:07,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:07,536 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 173 flow. Second operand 5 states and 853 transitions. [2023-08-30 00:10:07,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 453 flow [2023-08-30 00:10:07,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:10:07,538 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 174 flow [2023-08-30 00:10:07,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-30 00:10:07,539 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 00:10:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 174 flow [2023-08-30 00:10:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.25) internal successors, (1226), 8 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:07,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:07,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:10:07,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:07,750 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 [2023-08-30 00:10:07,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:07,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash 782982390, now seen corresponding path program 1 times [2023-08-30 00:10:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310715660] [2023-08-30 00:10:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:07,752 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 [2023-08-30 00:10:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:07,753 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) [2023-08-30 00:10:07,757 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 [2023-08-30 00:10:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:10:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:07,910 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:10:07,910 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 [2023-08-30 00:10:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:07,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:07,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:07,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310715660] [2023-08-30 00:10:07,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310715660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:07,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:10:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285513970] [2023-08-30 00:10:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:07,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:10:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:10:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:10:08,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2023-08-30 00:10:08,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:08,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:08,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2023-08-30 00:10:08,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:08,869 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2023-08-30 00:10:08,869 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 00:10:08,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 8489 events. 6411/8489 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 40190 event pairs, 4360 based on Foata normal form. 0/4745 useless extension candidates. Maximal degree in co-relation 17227. Up to 8446 conditions per place. [2023-08-30 00:10:08,910 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-30 00:10:08,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 260 flow [2023-08-30 00:10:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:10:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:10:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-08-30 00:10:08,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342447916666667 [2023-08-30 00:10:08,913 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-08-30 00:10:08,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-08-30 00:10:08,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:08,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-08-30 00:10:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:08,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:08,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:08,918 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 174 flow. Second operand 4 states and 667 transitions. [2023-08-30 00:10:08,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 260 flow [2023-08-30 00:10:08,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:10:08,920 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 167 flow [2023-08-30 00:10:08,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-30 00:10:08,922 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 00:10:08,922 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 167 flow [2023-08-30 00:10:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:08,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:08,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:10:08,931 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 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:09,128 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 [2023-08-30 00:10:09,128 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:09,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 782982391, now seen corresponding path program 1 times [2023-08-30 00:10:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037726832] [2023-08-30 00:10:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:09,129 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 [2023-08-30 00:10:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:09,130 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) [2023-08-30 00:10:09,134 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 [2023-08-30 00:10:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:10:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:09,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:09,344 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 25 treesize of output 21 [2023-08-30 00:10:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:09,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037726832] [2023-08-30 00:10:09,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037726832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:09,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:09,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:10:09,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937436472] [2023-08-30 00:10:09,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:09,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:10:09,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:10:09,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:10:10,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 384 [2023-08-30 00:10:10,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:10,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:10,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 384 [2023-08-30 00:10:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:11,203 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2023-08-30 00:10:11,203 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 00:10:11,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17242 conditions, 8483 events. 6411/8483 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39916 event pairs, 4360 based on Foata normal form. 0/4749 useless extension candidates. Maximal degree in co-relation 17224. Up to 4224 conditions per place. [2023-08-30 00:10:11,246 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-08-30 00:10:11,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 431 flow [2023-08-30 00:10:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:10:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:10:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-08-30 00:10:11,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-08-30 00:10:11,250 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-08-30 00:10:11,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-08-30 00:10:11,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:11,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-08-30 00:10:11,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.42857142857142) internal successors, (1179), 7 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:11,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:11,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:11,257 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 167 flow. Second operand 7 states and 1179 transitions. [2023-08-30 00:10:11,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 431 flow [2023-08-30 00:10:11,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:10:11,260 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 181 flow [2023-08-30 00:10:11,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 00:10:11,260 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-08-30 00:10:11,261 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 181 flow [2023-08-30 00:10:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:11,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:11,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:10:11,271 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 [2023-08-30 00:10:11,470 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 [2023-08-30 00:10:11,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:11,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1497055332, now seen corresponding path program 2 times [2023-08-30 00:10:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558398047] [2023-08-30 00:10:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:10:11,471 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 [2023-08-30 00:10:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:11,472 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) [2023-08-30 00:10:11,473 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 [2023-08-30 00:10:11,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:10:11,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:10:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:10:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:11,729 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:10:11,729 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 [2023-08-30 00:10:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:11,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:12,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:12,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558398047] [2023-08-30 00:10:12,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558398047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:12,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:12,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:10:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474136420] [2023-08-30 00:10:12,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:10:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:10:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:10:15,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 384 [2023-08-30 00:10:15,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:15,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:15,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 384 [2023-08-30 00:10:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:20,803 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2023-08-30 00:10:20,803 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2023-08-30 00:10:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77424 conditions, 38147 events. 28838/38147 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 212443 event pairs, 19620 based on Foata normal form. 6/21385 useless extension candidates. Maximal degree in co-relation 77406. Up to 4224 conditions per place. [2023-08-30 00:10:21,027 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2023-08-30 00:10:21,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1673 flow [2023-08-30 00:10:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:10:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:10:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2267 transitions. [2023-08-30 00:10:21,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919704861111111 [2023-08-30 00:10:21,033 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2267 transitions. [2023-08-30 00:10:21,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2267 transitions. [2023-08-30 00:10:21,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:21,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2267 transitions. [2023-08-30 00:10:21,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.91666666666666) internal successors, (2267), 12 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:21,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:21,044 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:21,044 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 181 flow. Second operand 12 states and 2267 transitions. [2023-08-30 00:10:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1673 flow [2023-08-30 00:10:21,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 366 transitions, 1656 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:10:21,050 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 265 flow [2023-08-30 00:10:21,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 00:10:21,050 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 00:10:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 265 flow [2023-08-30 00:10:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:21,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:21,065 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 [2023-08-30 00:10:21,261 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 [2023-08-30 00:10:21,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:21,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 827034521, now seen corresponding path program 1 times [2023-08-30 00:10:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:21,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047675048] [2023-08-30 00:10:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:21,263 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 [2023-08-30 00:10:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:21,264 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) [2023-08-30 00:10:21,268 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 [2023-08-30 00:10:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:10:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:21,432 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 00:10:21,432 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 [2023-08-30 00:10:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:21,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:21,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047675048] [2023-08-30 00:10:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047675048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:21,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:21,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:10:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973024139] [2023-08-30 00:10:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:10:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:10:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:10:21,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:10:21,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:21,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:21,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:10:21,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:23,915 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2023-08-30 00:10:23,915 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 00:10:24,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75672 conditions, 37256 events. 28244/37256 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 209014 event pairs, 19170 based on Foata normal form. 0/20957 useless extension candidates. Maximal degree in co-relation 75648. Up to 37121 conditions per place. [2023-08-30 00:10:24,236 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:10:24,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 55 transitions, 369 flow [2023-08-30 00:10:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:10:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:10:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 00:10:24,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 00:10:24,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 00:10:24,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 00:10:24,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:24,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 00:10:24,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:24,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:24,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:24,242 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 265 flow. Second operand 3 states and 528 transitions. [2023-08-30 00:10:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 55 transitions, 369 flow [2023-08-30 00:10:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 55 transitions, 344 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:10:24,246 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 238 flow [2023-08-30 00:10:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=238, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-08-30 00:10:24,247 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-30 00:10:24,247 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 238 flow [2023-08-30 00:10:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:24,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:10:24,458 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 [2023-08-30 00:10:24,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:24,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 827034520, now seen corresponding path program 1 times [2023-08-30 00:10:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665378743] [2023-08-30 00:10:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:24,459 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 [2023-08-30 00:10:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:24,460 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) [2023-08-30 00:10:24,461 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 [2023-08-30 00:10:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:10:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:10:24,700 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2023-08-30 00:10:24,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2023-08-30 00:10:24,713 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 60 treesize of output 58 [2023-08-30 00:10:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:25,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665378743] [2023-08-30 00:10:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665378743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:25,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:25,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:10:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552989386] [2023-08-30 00:10:25,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:25,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:10:25,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:10:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:10:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:10:25,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:25,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:25,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:10:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:27,997 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2023-08-30 00:10:27,997 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-08-30 00:10:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73873 conditions, 36365 events. 27650/36365 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 203063 event pairs, 18720 based on Foata normal form. 0/20695 useless extension candidates. Maximal degree in co-relation 73848. Up to 32204 conditions per place. [2023-08-30 00:10:28,335 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 83 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-30 00:10:28,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 482 flow [2023-08-30 00:10:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:10:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:10:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-08-30 00:10:28,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-08-30 00:10:28,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-08-30 00:10:28,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-08-30 00:10:28,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:28,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-08-30 00:10:28,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:28,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:28,341 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:28,341 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 238 flow. Second operand 5 states and 844 transitions. [2023-08-30 00:10:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 482 flow [2023-08-30 00:10:28,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:10:28,344 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 239 flow [2023-08-30 00:10:28,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-30 00:10:28,345 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-30 00:10:28,345 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 239 flow [2023-08-30 00:10:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:28,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:28,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:28,357 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 [2023-08-30 00:10:28,557 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 [2023-08-30 00:10:28,557 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:28,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash 826824309, now seen corresponding path program 1 times [2023-08-30 00:10:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779679082] [2023-08-30 00:10:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:28,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:10:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:28,560 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) [2023-08-30 00:10:28,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:10:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:10:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:28,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:28,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779679082] [2023-08-30 00:10:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779679082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:28,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:10:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749644644] [2023-08-30 00:10:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:10:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:10:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:10:28,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 00:10:28,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:28,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:28,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 00:10:28,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:32,395 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2023-08-30 00:10:32,395 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 00:10:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111460 conditions, 54851 events. 41933/54851 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 329691 event pairs, 6201 based on Foata normal form. 0/30902 useless extension candidates. Maximal degree in co-relation 111434. Up to 37404 conditions per place. [2023-08-30 00:10:32,748 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-08-30 00:10:32,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 533 flow [2023-08-30 00:10:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:10:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:10:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-08-30 00:10:32,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46041666666666664 [2023-08-30 00:10:32,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-08-30 00:10:32,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-08-30 00:10:32,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:32,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-08-30 00:10:32,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:32,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:32,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:32,755 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 239 flow. Second operand 5 states and 884 transitions. [2023-08-30 00:10:32,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 533 flow [2023-08-30 00:10:32,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:10:32,758 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 270 flow [2023-08-30 00:10:32,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 00:10:32,759 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 00:10:32,759 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 270 flow [2023-08-30 00:10:32,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:32,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:32,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:32,769 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 [2023-08-30 00:10:32,968 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 [2023-08-30 00:10:32,969 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:32,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -138246400, now seen corresponding path program 1 times [2023-08-30 00:10:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28855178] [2023-08-30 00:10:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:32,970 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 [2023-08-30 00:10:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:32,973 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) [2023-08-30 00:10:32,976 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 [2023-08-30 00:10:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:10:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:33,209 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:10:33,210 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 [2023-08-30 00:10:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:33,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:33,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28855178] [2023-08-30 00:10:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28855178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:33,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:33,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:10:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874296745] [2023-08-30 00:10:33,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:33,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:10:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:10:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:10:35,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:10:35,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:35,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:35,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:10:35,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:42,579 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2023-08-30 00:10:42,580 INFO L131 PetriNetUnfolder]: For 18379/18379 co-relation queries the response was YES. [2023-08-30 00:10:42,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183776 conditions, 77693 events. 60131/77693 cut-off events. For 18379/18379 co-relation queries the response was YES. Maximal size of possible extension queue 2990. Compared 465090 event pairs, 11511 based on Foata normal form. 1548/59414 useless extension candidates. Maximal degree in co-relation 183748. Up to 26965 conditions per place. [2023-08-30 00:10:43,134 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-08-30 00:10:43,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 772 flow [2023-08-30 00:10:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:10:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:10:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-08-30 00:10:43,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410807291666667 [2023-08-30 00:10:43,138 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-08-30 00:10:43,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-08-30 00:10:43,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:43,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-08-30 00:10:43,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.375) internal successors, (1355), 8 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:43,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:43,142 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:43,142 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 270 flow. Second operand 8 states and 1355 transitions. [2023-08-30 00:10:43,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 772 flow [2023-08-30 00:10:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 764 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:10:43,156 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 337 flow [2023-08-30 00:10:43,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-08-30 00:10:43,156 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-08-30 00:10:43,157 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 337 flow [2023-08-30 00:10:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:43,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:43,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:43,166 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 [2023-08-30 00:10:43,360 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 [2023-08-30 00:10:43,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:43,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 211056040, now seen corresponding path program 1 times [2023-08-30 00:10:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125103660] [2023-08-30 00:10:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:43,361 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 [2023-08-30 00:10:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:43,362 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) [2023-08-30 00:10:43,363 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 [2023-08-30 00:10:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:10:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:10:43,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:10:43,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125103660] [2023-08-30 00:10:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125103660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:10:43,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:10:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:10:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686158628] [2023-08-30 00:10:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:10:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:10:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:10:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:10:43,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 00:10:43,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:43,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:43,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 00:10:43,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:10:53,158 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2023-08-30 00:10:53,158 INFO L131 PetriNetUnfolder]: For 109206/109260 co-relation queries the response was YES. [2023-08-30 00:10:53,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305247 conditions, 109949 events. 85223/109949 cut-off events. For 109206/109260 co-relation queries the response was YES. Maximal size of possible extension queue 4092. Compared 657474 event pairs, 22545 based on Foata normal form. 18/83309 useless extension candidates. Maximal degree in co-relation 305213. Up to 77868 conditions per place. [2023-08-30 00:10:54,228 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-08-30 00:10:54,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 710 flow [2023-08-30 00:10:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:10:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:10:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-08-30 00:10:54,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2023-08-30 00:10:54,230 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-08-30 00:10:54,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-08-30 00:10:54,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:10:54,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-08-30 00:10:54,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:54,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:54,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:54,234 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 337 flow. Second operand 5 states and 882 transitions. [2023-08-30 00:10:54,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 710 flow [2023-08-30 00:10:54,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 683 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 00:10:54,446 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 340 flow [2023-08-30 00:10:54,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-08-30 00:10:54,446 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-08-30 00:10:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 340 flow [2023-08-30 00:10:54,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:54,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:10:54,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:10:54,455 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 (17)] Ended with exit code 0 [2023-08-30 00:10:54,647 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 [2023-08-30 00:10:54,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:10:54,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:10:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash 211245344, now seen corresponding path program 1 times [2023-08-30 00:10:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:10:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549228069] [2023-08-30 00:10:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:10:54,648 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 [2023-08-30 00:10:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:10:54,649 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) [2023-08-30 00:10:54,650 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 [2023-08-30 00:10:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:10:54,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:10:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:10:54,895 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:10:54,896 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 [2023-08-30 00:10:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:55,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:10:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:10:55,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:10:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549228069] [2023-08-30 00:10:55,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549228069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:10:55,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:10:55,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:10:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658113758] [2023-08-30 00:10:55,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:10:55,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:10:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:10:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:10:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:10:56,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:10:56,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:10:56,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:10:56,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:10:56,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:05,066 INFO L130 PetriNetUnfolder]: 75431/97547 cut-off events. [2023-08-30 00:11:05,066 INFO L131 PetriNetUnfolder]: For 102564/102564 co-relation queries the response was YES. [2023-08-30 00:11:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276511 conditions, 97547 events. 75431/97547 cut-off events. For 102564/102564 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 575079 event pairs, 49806 based on Foata normal form. 0/81815 useless extension candidates. Maximal degree in co-relation 276476. Up to 86644 conditions per place. [2023-08-30 00:11:05,880 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 99 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-08-30 00:11:05,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 704 flow [2023-08-30 00:11:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:11:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:11:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-08-30 00:11:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-30 00:11:05,882 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-08-30 00:11:05,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-08-30 00:11:05,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:05,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-08-30 00:11:05,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:05,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:05,885 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:05,885 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 340 flow. Second operand 5 states and 840 transitions. [2023-08-30 00:11:05,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 704 flow [2023-08-30 00:11:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:11:06,017 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 332 flow [2023-08-30 00:11:06,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2023-08-30 00:11:06,018 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-08-30 00:11:06,018 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 332 flow [2023-08-30 00:11:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:06,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:06,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:06,028 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 (18)] Ended with exit code 0 [2023-08-30 00:11:06,224 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 [2023-08-30 00:11:06,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:11:06,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash 211245343, now seen corresponding path program 1 times [2023-08-30 00:11:06,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:06,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72899887] [2023-08-30 00:11:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:06,226 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 [2023-08-30 00:11:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:06,226 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) [2023-08-30 00:11:06,227 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 [2023-08-30 00:11:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:11:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:06,418 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 00:11:06,418 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 [2023-08-30 00:11:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:06,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:11:06,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:06,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72899887] [2023-08-30 00:11:06,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72899887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:11:06,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:11:06,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:11:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407916262] [2023-08-30 00:11:06,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:11:06,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:11:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:11:06,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:11:06,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2023-08-30 00:11:06,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:06,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:06,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2023-08-30 00:11:06,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:14,287 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2023-08-30 00:11:14,287 INFO L131 PetriNetUnfolder]: For 84618/84618 co-relation queries the response was YES. [2023-08-30 00:11:14,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238848 conditions, 85379 events. 65873/85379 cut-off events. For 84618/84618 co-relation queries the response was YES. Maximal size of possible extension queue 3101. Compared 497942 event pairs, 43587 based on Foata normal form. 0/73742 useless extension candidates. Maximal degree in co-relation 238813. Up to 85271 conditions per place. [2023-08-30 00:11:15,028 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:11:15,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 444 flow [2023-08-30 00:11:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:11:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:11:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 00:11:15,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-08-30 00:11:15,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 00:11:15,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 00:11:15,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:15,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 00:11:15,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:15,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:15,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:15,031 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 332 flow. Second operand 3 states and 513 transitions. [2023-08-30 00:11:15,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 444 flow [2023-08-30 00:11:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:11:15,139 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 325 flow [2023-08-30 00:11:15,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2023-08-30 00:11:15,139 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-08-30 00:11:15,139 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 325 flow [2023-08-30 00:11:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:15,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:15,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:15,149 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 [2023-08-30 00:11:15,340 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 [2023-08-30 00:11:15,340 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:11:15,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2047193718, now seen corresponding path program 1 times [2023-08-30 00:11:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:15,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571637485] [2023-08-30 00:11:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:15,341 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 [2023-08-30 00:11:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:15,342 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) [2023-08-30 00:11:15,343 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 [2023-08-30 00:11:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:11:15,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:15,558 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:11:15,558 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 [2023-08-30 00:11:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:15,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:11:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:16,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571637485] [2023-08-30 00:11:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571637485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:11:16,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:11:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:11:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414107163] [2023-08-30 00:11:16,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:11:16,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:11:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:11:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:11:18,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:11:18,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:18,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:18,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:11:18,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:30,112 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2023-08-30 00:11:30,112 INFO L131 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2023-08-30 00:11:30,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351689 conditions, 126239 events. 98849/126239 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 762910 event pairs, 23391 based on Foata normal form. 2628/113738 useless extension candidates. Maximal degree in co-relation 351654. Up to 47638 conditions per place. [2023-08-30 00:11:31,311 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2023-08-30 00:11:31,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1054 flow [2023-08-30 00:11:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:11:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:11:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-08-30 00:11:31,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358723958333333 [2023-08-30 00:11:31,315 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-08-30 00:11:31,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-08-30 00:11:31,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:31,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-08-30 00:11:31,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:31,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:31,319 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:31,319 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 325 flow. Second operand 8 states and 1339 transitions. [2023-08-30 00:11:31,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1054 flow [2023-08-30 00:11:31,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1051 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:11:31,451 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 397 flow [2023-08-30 00:11:31,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-08-30 00:11:31,452 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-08-30 00:11:31,452 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 397 flow [2023-08-30 00:11:31,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:31,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:31,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:31,464 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 (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:11:31,653 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 [2023-08-30 00:11:31,653 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:11:31,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2041334241, now seen corresponding path program 1 times [2023-08-30 00:11:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078325971] [2023-08-30 00:11:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:31,654 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 [2023-08-30 00:11:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:31,655 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) [2023-08-30 00:11:31,656 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 [2023-08-30 00:11:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:11:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:11:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:11:31,962 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 25 treesize of output 21 [2023-08-30 00:11:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:11:32,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078325971] [2023-08-30 00:11:32,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078325971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:11:32,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:11:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:11:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883501008] [2023-08-30 00:11:32,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:11:32,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:11:32,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:11:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:11:33,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:11:33,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 397 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:33,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:33,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:11:33,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:11:49,610 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2023-08-30 00:11:49,610 INFO L131 PetriNetUnfolder]: For 340489/340489 co-relation queries the response was YES. [2023-08-30 00:11:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563520 conditions, 167828 events. 127811/167828 cut-off events. For 340489/340489 co-relation queries the response was YES. Maximal size of possible extension queue 3515. Compared 999134 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563479. Up to 101297 conditions per place. [2023-08-30 00:11:51,203 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2023-08-30 00:11:51,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1357 flow [2023-08-30 00:11:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:11:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:11:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1496 transitions. [2023-08-30 00:11:51,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2023-08-30 00:11:51,207 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1496 transitions. [2023-08-30 00:11:51,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1496 transitions. [2023-08-30 00:11:51,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:11:51,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1496 transitions. [2023-08-30 00:11:51,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.22222222222223) internal successors, (1496), 9 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:51,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:51,214 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:51,214 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 397 flow. Second operand 9 states and 1496 transitions. [2023-08-30 00:11:51,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1357 flow [2023-08-30 00:11:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1310 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-30 00:11:51,770 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 436 flow [2023-08-30 00:11:51,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-08-30 00:11:51,770 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2023-08-30 00:11:51,770 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 436 flow [2023-08-30 00:11:51,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:51,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:11:51,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:11:51,778 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 [2023-08-30 00:11:51,971 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 [2023-08-30 00:11:51,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:11:51,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:11:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1143151987, now seen corresponding path program 1 times [2023-08-30 00:11:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:11:51,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278643252] [2023-08-30 00:11:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:11:51,972 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 [2023-08-30 00:11:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:11:51,973 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) [2023-08-30 00:11:51,974 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 [2023-08-30 00:11:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:11:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:11:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:11:52,413 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:11:52,413 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 [2023-08-30 00:11:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:52,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:11:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:11:52,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:11:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278643252] [2023-08-30 00:11:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278643252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:11:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:11:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:11:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723503963] [2023-08-30 00:11:52,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:11:52,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:11:52,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:11:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:11:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:11:54,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:11:54,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:11:54,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:11:54,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:11:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:12:23,973 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2023-08-30 00:12:23,980 INFO L131 PetriNetUnfolder]: For 534737/534737 co-relation queries the response was YES. [2023-08-30 00:12:26,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922814 conditions, 260708 events. 201899/260708 cut-off events. For 534737/534737 co-relation queries the response was YES. Maximal size of possible extension queue 4866. Compared 1532061 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922771. Up to 86887 conditions per place. [2023-08-30 00:12:27,235 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-08-30 00:12:27,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 200 transitions, 1504 flow [2023-08-30 00:12:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:12:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:12:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1346 transitions. [2023-08-30 00:12:27,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381510416666667 [2023-08-30 00:12:27,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1346 transitions. [2023-08-30 00:12:27,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1346 transitions. [2023-08-30 00:12:27,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:12:27,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1346 transitions. [2023-08-30 00:12:27,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:27,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:27,243 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:27,243 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 436 flow. Second operand 8 states and 1346 transitions. [2023-08-30 00:12:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 200 transitions, 1504 flow [2023-08-30 00:12:28,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1485 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:12:28,548 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 520 flow [2023-08-30 00:12:28,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2023-08-30 00:12:28,548 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2023-08-30 00:12:28,548 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 520 flow [2023-08-30 00:12:28,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:28,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:12:28,549 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:12:28,556 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 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:12:28,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /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 [2023-08-30 00:12:28,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:12:28,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:12:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 378904885, now seen corresponding path program 2 times [2023-08-30 00:12:28,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:12:28,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632505626] [2023-08-30 00:12:28,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:12:28,750 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 [2023-08-30 00:12:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:12:28,752 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2023-08-30 00:12:28,754 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 (23)] Waiting until timeout for monitored process [2023-08-30 00:12:28,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:12:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:12:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:12:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:12:29,132 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:12:29,133 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 [2023-08-30 00:12:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:12:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:12:30,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:12:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632505626] [2023-08-30 00:12:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632505626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:12:30,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:12:30,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:12:30,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304366915] [2023-08-30 00:12:30,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:12:30,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:12:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:12:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:12:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:12:39,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 00:12:39,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:12:39,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:12:39,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 00:12:39,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:14,390 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2023-08-30 00:13:14,391 INFO L131 PetriNetUnfolder]: For 878235/903610 co-relation queries the response was YES. [2023-08-30 00:13:16,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978910 conditions, 238130 events. 183763/238130 cut-off events. For 878235/903610 co-relation queries the response was YES. Maximal size of possible extension queue 5117. Compared 1435100 event pairs, 69301 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978862. Up to 105814 conditions per place. [2023-08-30 00:13:17,407 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2023-08-30 00:13:17,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 501 transitions, 4014 flow [2023-08-30 00:13:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:13:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:13:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-08-30 00:13:17,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42283442982456143 [2023-08-30 00:13:17,411 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-08-30 00:13:17,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-08-30 00:13:17,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:17,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-08-30 00:13:17,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:17,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:17,420 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:17,420 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 520 flow. Second operand 19 states and 3085 transitions. [2023-08-30 00:13:17,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 501 transitions, 4014 flow [2023-08-30 00:13:20,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 501 transitions, 3792 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 00:13:20,799 INFO L231 Difference]: Finished difference. Result has 135 places, 87 transitions, 662 flow [2023-08-30 00:13:20,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=662, PETRI_PLACES=135, PETRI_TRANSITIONS=87} [2023-08-30 00:13:20,800 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2023-08-30 00:13:20,800 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 87 transitions, 662 flow [2023-08-30 00:13:20,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:20,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:20,801 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:13:20,808 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 [2023-08-30 00:13:21,002 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:21,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash -796862084, now seen corresponding path program 3 times [2023-08-30 00:13:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438536321] [2023-08-30 00:13:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:13:21,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:21,004 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2023-08-30 00:13:21,004 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 (24)] Waiting until timeout for monitored process [2023-08-30 00:13:21,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:13:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:13:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:13:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:21,343 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:13:21,344 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 [2023-08-30 00:13:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:21,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:23,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:23,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438536321] [2023-08-30 00:13:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438536321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:23,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:13:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836218184] [2023-08-30 00:13:23,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:13:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:13:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:13:38,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 00:13:38,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 87 transitions, 662 flow. Second operand has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:38,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:38,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 00:13:38,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:15:08,627 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2023-08-30 00:15:08,627 INFO L131 PetriNetUnfolder]: For 2098057/2156156 co-relation queries the response was YES. [2023-08-30 00:15:13,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290389 conditions, 550178 events. 425599/550178 cut-off events. For 2098057/2156156 co-relation queries the response was YES. Maximal size of possible extension queue 6976. Compared 3370161 event pairs, 304837 based on Foata normal form. 58111/608272 useless extension candidates. Maximal degree in co-relation 2290336. Up to 96633 conditions per place. [2023-08-30 00:15:16,153 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 1092 selfloop transitions, 25 changer transitions 0/1119 dead transitions. [2023-08-30 00:15:16,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1119 transitions, 8909 flow [2023-08-30 00:15:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:15:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:15:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4613 transitions. [2023-08-30 00:15:16,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48052083333333334 [2023-08-30 00:15:16,158 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4613 transitions. [2023-08-30 00:15:16,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4613 transitions. [2023-08-30 00:15:16,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:15:16,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4613 transitions. [2023-08-30 00:15:16,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 184.52) internal successors, (4613), 25 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:16,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:16,169 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:16,169 INFO L175 Difference]: Start difference. First operand has 135 places, 87 transitions, 662 flow. Second operand 25 states and 4613 transitions. [2023-08-30 00:15:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1119 transitions, 8909 flow [2023-08-30 00:15:42,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1119 transitions, 8820 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-08-30 00:15:42,651 INFO L231 Difference]: Finished difference. Result has 153 places, 100 transitions, 756 flow [2023-08-30 00:15:42,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=756, PETRI_PLACES=153, PETRI_TRANSITIONS=100} [2023-08-30 00:15:42,652 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2023-08-30 00:15:42,652 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 100 transitions, 756 flow [2023-08-30 00:15:42,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:42,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:15:42,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:15:42,661 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 (24)] Ended with exit code 0 [2023-08-30 00:15:42,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /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 [2023-08-30 00:15:42,853 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:15:42,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:15:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash 591158824, now seen corresponding path program 2 times [2023-08-30 00:15:42,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:15:42,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069007408] [2023-08-30 00:15:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:15:42,854 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 [2023-08-30 00:15:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:15:42,855 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2023-08-30 00:15:42,855 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 (25)] Waiting until timeout for monitored process [2023-08-30 00:15:42,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:15:42,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:15:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:15:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:15:43,115 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:15:43,115 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 [2023-08-30 00:15:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:43,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:15:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:44,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:15:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069007408] [2023-08-30 00:15:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069007408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:15:44,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:15:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:15:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084018025] [2023-08-30 00:15:44,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:15:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:15:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:15:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:15:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:15:52,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 00:15:52,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 100 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:52,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:15:52,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 00:15:52,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:15,589 INFO L130 PetriNetUnfolder]: 434799/563292 cut-off events. [2023-08-30 00:17:15,589 INFO L131 PetriNetUnfolder]: For 2186294/2246189 co-relation queries the response was YES. [2023-08-30 00:17:21,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332077 conditions, 563292 events. 434799/563292 cut-off events. For 2186294/2246189 co-relation queries the response was YES. Maximal size of possible extension queue 7695. Compared 3559969 event pairs, 217437 based on Foata normal form. 61733/625011 useless extension candidates. Maximal degree in co-relation 2332025. Up to 352210 conditions per place. [2023-08-30 00:17:24,051 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 488 selfloop transitions, 24 changer transitions 0/514 dead transitions. [2023-08-30 00:17:24,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 4214 flow [2023-08-30 00:17:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:17:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:17:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3076 transitions. [2023-08-30 00:17:24,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160087719298245 [2023-08-30 00:17:24,056 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3076 transitions. [2023-08-30 00:17:24,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3076 transitions. [2023-08-30 00:17:24,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:24,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3076 transitions. [2023-08-30 00:17:24,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.89473684210526) internal successors, (3076), 19 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:24,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:24,062 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:24,062 INFO L175 Difference]: Start difference. First operand has 153 places, 100 transitions, 756 flow. Second operand 19 states and 3076 transitions. [2023-08-30 00:17:24,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 4214 flow [2023-08-30 00:17:59,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 514 transitions, 4136 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-08-30 00:17:59,347 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 847 flow [2023-08-30 00:17:59,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=847, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2023-08-30 00:17:59,347 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 83 predicate places. [2023-08-30 00:17:59,347 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 847 flow [2023-08-30 00:17:59,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:59,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:59,348 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 00:17:59,358 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 (25)] Ended with exit code 0 [2023-08-30 00:17:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 [2023-08-30 00:17:59,558 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:17:59,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 725096965, now seen corresponding path program 3 times [2023-08-30 00:17:59,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795280127] [2023-08-30 00:17:59,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:17:59,559 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 [2023-08-30 00:17:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:59,560 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2023-08-30 00:17:59,563 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 (26)] Waiting until timeout for monitored process [2023-08-30 00:17:59,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:17:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:17:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:59,898 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:17:59,899 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 [2023-08-30 00:18:00,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 00:18:00,292 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 7 treesize of output 5 [2023-08-30 00:18:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:00,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:18:00,400 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 8 treesize of output 6 [2023-08-30 00:18:00,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 00:18:00,432 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:18:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:18:01,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:18:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795280127] [2023-08-30 00:18:01,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795280127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:18:01,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:18:01,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:18:01,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514383012] [2023-08-30 00:18:01,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:18:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:18:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:18:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:18:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:18:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2023-08-30 00:18:15,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 847 flow. Second operand has 21 states, 21 states have (on average 152.23809523809524) internal successors, (3197), 21 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:18:15,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:18:15,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2023-08-30 00:18:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:43,174 INFO L130 PetriNetUnfolder]: 443249/575297 cut-off events. [2023-08-30 00:19:43,174 INFO L131 PetriNetUnfolder]: For 2651667/2713330 co-relation queries the response was YES. [2023-08-30 00:19:49,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532618 conditions, 575297 events. 443249/575297 cut-off events. For 2651667/2713330 co-relation queries the response was YES. Maximal size of possible extension queue 8075. Compared 3639543 event pairs, 234449 based on Foata normal form. 63469/638762 useless extension candidates. Maximal degree in co-relation 2532566. Up to 404383 conditions per place. [2023-08-30 00:19:52,061 INFO L137 encePairwiseOnDemand]: 374/384 looper letters, 692 selfloop transitions, 52 changer transitions 0/746 dead transitions. [2023-08-30 00:19:52,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 746 transitions, 6380 flow [2023-08-30 00:19:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:19:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:19:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-08-30 00:19:52,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380425347222222 [2023-08-30 00:19:52,067 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-08-30 00:19:52,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-08-30 00:19:52,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:52,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-08-30 00:19:52,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:52,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:52,075 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:52,075 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 847 flow. Second operand 24 states and 4037 transitions. [2023-08-30 00:19:52,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 746 transitions, 6380 flow [2023-08-30 00:21:14,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 746 transitions, 6117 flow, removed 120 selfloop flow, removed 6 redundant places. [2023-08-30 00:21:14,489 INFO L231 Difference]: Finished difference. Result has 187 places, 148 transitions, 1297 flow [2023-08-30 00:21:14,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1297, PETRI_PLACES=187, PETRI_TRANSITIONS=148} [2023-08-30 00:21:14,490 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 110 predicate places. [2023-08-30 00:21:14,490 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 148 transitions, 1297 flow [2023-08-30 00:21:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 152.23809523809524) internal successors, (3197), 21 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:14,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:21:14,490 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:21:14,499 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 (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:21:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /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 [2023-08-30 00:21:14,691 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:21:14,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:21:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1479706480, now seen corresponding path program 4 times [2023-08-30 00:21:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:21:14,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680205841] [2023-08-30 00:21:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:21:14,692 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 [2023-08-30 00:21:14,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:21:14,693 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2023-08-30 00:21:14,695 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 (27)] Waiting until timeout for monitored process [2023-08-30 00:21:14,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:21:14,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:21:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:21:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:21:14,958 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:21:14,958 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 Killed by 15