./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:52:04,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:52:04,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:52:04,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:52:04,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:52:04,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:52:04,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:52:04,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:52:04,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:52:04,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:52:04,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:52:04,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:52:04,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:52:04,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:52:04,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:52:04,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:52:04,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:52:04,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:52:04,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:52:04,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:52:04,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:52:04,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:52:04,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:52:04,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:52:04,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:52:04,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:52:04,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:52:04,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:52:04,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:52:04,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:52:04,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:52:04,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:52:04,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:52:04,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:52:04,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:52:04,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:52:04,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:52:04,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:52:04,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:52:04,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:52:04,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:52:04,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:52:04,750 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:52:04,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:52:04,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:52:04,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:52:04,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:52:04,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:52:04,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:52:04,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:52:04,753 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:52:04,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:52:04,754 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:52:04,754 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:52:04,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:52:04,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:52:04,756 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:52:04,756 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:52:04,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:52:04,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:52:04,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:52:04,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:52:04,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:52:04,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:52:04,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:52:04,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:52:04,757 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:52:04,757 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:52:04,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:52:04,758 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:52:04,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:52:05,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:52:05,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:52:05,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:52:05,049 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:52:05,049 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:52:05,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 03:52:06,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:52:06,245 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:52:06,246 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 03:52:06,257 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98ea97f4/fc07f0df187c45efb4d9bc0634a453b3/FLAG25efc45d8 [2023-09-01 03:52:06,276 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98ea97f4/fc07f0df187c45efb4d9bc0634a453b3 [2023-09-01 03:52:06,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:52:06,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:52:06,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:52:06,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:52:06,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:52:06,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:52:06" (1/1) ... [2023-09-01 03:52:06,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5a119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:06, skipping insertion in model container [2023-09-01 03:52:06,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:52:06" (1/1) ... [2023-09-01 03:52:06,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:52:06,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:52:06,438 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-send-receive-alt.wvr.c[2650,2663] [2023-09-01 03:52:06,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:52:06,457 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:52:06,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ee9e940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:06, skipping insertion in model container [2023-09-01 03:52:06,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:52:06,459 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:52:06,461 INFO L158 Benchmark]: Toolchain (without parser) took 180.60ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 39.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:52:06,461 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 97.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:52:06,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.41ms. Allocated memory is still 71.3MB. Free memory was 49.1MB in the beginning and 39.6MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:52:06,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 97.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.41ms. Allocated memory is still 71.3MB. Free memory was 49.1MB in the beginning and 39.6MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: 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-send-receive-alt.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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:52:07,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:52:07,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:52:08,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:52:08,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:52:08,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:52:08,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:52:08,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:52:08,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:52:08,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:52:08,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:52:08,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:52:08,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:52:08,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:52:08,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:52:08,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:52:08,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:52:08,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:52:08,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:52:08,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:52:08,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:52:08,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:52:08,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:52:08,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:52:08,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:52:08,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:52:08,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:52:08,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:52:08,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:52:08,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:52:08,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:52:08,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:52:08,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:52:08,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:52:08,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:52:08,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:52:08,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:52:08,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:52:08,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:52:08,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:52:08,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:52:08,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:52:08,108 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:52:08,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:52:08,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:52:08,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:52:08,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:52:08,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:52:08,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:52:08,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:52:08,111 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:52:08,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:52:08,113 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:52:08,114 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:52:08,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:52:08,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:52:08,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:52:08,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:52:08,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:52:08,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:52:08,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:52:08,116 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:52:08,116 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:52:08,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:52:08,116 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:52:08,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:52:08,117 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:52:08,117 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:52:08,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:52:08,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:52:08,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:52:08,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:52:08,404 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:52:08,404 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:52:08,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 03:52:09,315 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:52:09,488 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:52:09,489 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 03:52:09,493 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d05781f/64a194b8040e4fb7906bfca49741e5fd/FLAG5892a77d9 [2023-09-01 03:52:09,506 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d05781f/64a194b8040e4fb7906bfca49741e5fd [2023-09-01 03:52:09,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:52:09,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:52:09,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:52:09,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:52:09,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:52:09,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee04cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09, skipping insertion in model container [2023-09-01 03:52:09,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:52:09,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:52:09,678 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-send-receive-alt.wvr.c[2650,2663] [2023-09-01 03:52:09,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:52:09,698 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:52:09,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:52:09,710 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-send-receive-alt.wvr.c[2650,2663] [2023-09-01 03:52:09,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:52:09,722 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:52:09,739 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-send-receive-alt.wvr.c[2650,2663] [2023-09-01 03:52:09,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:52:09,753 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:52:09,753 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:52:09,758 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:52:09,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09 WrapperNode [2023-09-01 03:52:09,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:52:09,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:52:09,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:52:09,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:52:09,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,802 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 144 [2023-09-01 03:52:09,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:52:09,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:52:09,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:52:09,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:52:09,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:52:09,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:52:09,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:52:09,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:52:09,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (1/1) ... [2023-09-01 03:52:09,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:52:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:52:09,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:52:09,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:52:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:52:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:52:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:52:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:52:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:52:09,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:52:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:52:09,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:52:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:52:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:52:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:52:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:52:09,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:52:09,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:52:09,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:52:09,934 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:52:10,068 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:52:10,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:52:10,354 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:52:10,451 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:52:10,451 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 03:52:10,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:52:10 BoogieIcfgContainer [2023-09-01 03:52:10,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:52:10,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:52:10,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:52:10,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:52:10,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:52:09" (1/3) ... [2023-09-01 03:52:10,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df097e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:52:10, skipping insertion in model container [2023-09-01 03:52:10,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:52:09" (2/3) ... [2023-09-01 03:52:10,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df097e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:52:10, skipping insertion in model container [2023-09-01 03:52:10,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:52:10" (3/3) ... [2023-09-01 03:52:10,458 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-09-01 03:52:10,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:52:10,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 03:52:10,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:52:10,541 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:52:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 03:52:10,627 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2023-09-01 03:52:10,628 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:52:10,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-09-01 03:52:10,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2023-09-01 03:52:10,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-09-01 03:52:10,639 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:52:10,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-09-01 03:52:10,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-09-01 03:52:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-09-01 03:52:10,673 INFO L130 PetriNetUnfolder]: 11/138 cut-off events. [2023-09-01 03:52:10,673 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:52:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 149 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-09-01 03:52:10,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 1336 [2023-09-01 03:52:22,369 INFO L134 LiptonReduction]: Checked pairs total: 1708 [2023-09-01 03:52:22,369 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-09-01 03:52:22,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:52:22,389 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;@1f544086, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:52:22,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-09-01 03:52:22,393 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:52:22,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:52:22,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:22,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:52:22,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:22,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 20468, now seen corresponding path program 1 times [2023-09-01 03:52:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508902592] [2023-09-01 03:52:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:22,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:22,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:22,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:52:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:52:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:22,590 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:52:22,591 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:52:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:22,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:22,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:22,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508902592] [2023-09-01 03:52:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508902592] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634889346] [2023-09-01 03:52:22,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:22,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:22,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:22,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-09-01 03:52:22,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:22,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:22,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-09-01 03:52:22,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:22,972 INFO L130 PetriNetUnfolder]: 306/469 cut-off events. [2023-09-01 03:52:22,973 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 03:52:22,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 469 events. 306/469 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 1986 event pairs, 174 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 772. Up to 465 conditions per place. [2023-09-01 03:52:22,991 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 03:52:22,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 134 flow [2023-09-01 03:52:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-09-01 03:52:23,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331140350877193 [2023-09-01 03:52:23,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-09-01 03:52:23,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-09-01 03:52:23,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:23,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-09-01 03:52:23,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,019 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 78 flow. Second operand 3 states and 395 transitions. [2023-09-01 03:52:23,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 134 flow [2023-09-01 03:52:23,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:52:23,023 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 68 flow [2023-09-01 03:52:23,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-09-01 03:52:23,031 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-09-01 03:52:23,031 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 68 flow [2023-09-01 03:52:23,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:23,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:52:23,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:23,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:23,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 20513, now seen corresponding path program 1 times [2023-09-01 03:52:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146478687] [2023-09-01 03:52:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:23,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:23,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:23,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:52:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:52:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:52:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:52:23,354 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:52:23,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:52:23,366 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 10 treesize of output 8 [2023-09-01 03:52:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:23,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:23,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:23,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146478687] [2023-09-01 03:52:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146478687] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:23,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757016549] [2023-09-01 03:52:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:23,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-09-01 03:52:23,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:23,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-09-01 03:52:23,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:23,676 INFO L130 PetriNetUnfolder]: 234/368 cut-off events. [2023-09-01 03:52:23,677 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:52:23,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 368 events. 234/368 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 1496 event pairs, 133 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 735. Up to 364 conditions per place. [2023-09-01 03:52:23,680 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 27 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 03:52:23,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 120 flow [2023-09-01 03:52:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-09-01 03:52:23,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309210526315789 [2023-09-01 03:52:23,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-09-01 03:52:23,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-09-01 03:52:23,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:23,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-09-01 03:52:23,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,692 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 68 flow. Second operand 3 states and 393 transitions. [2023-09-01 03:52:23,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 120 flow [2023-09-01 03:52:23,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:23,693 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 65 flow [2023-09-01 03:52:23,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-09-01 03:52:23,695 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-09-01 03:52:23,695 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 65 flow [2023-09-01 03:52:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:52:23,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 03:52:23,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:23,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:23,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash 20466, now seen corresponding path program 1 times [2023-09-01 03:52:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:23,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872504094] [2023-09-01 03:52:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:23,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:23,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:23,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:52:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:52:23,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:24,015 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:24,016 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:24,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:24,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872504094] [2023-09-01 03:52:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872504094] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:24,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:24,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424063166] [2023-09-01 03:52:24,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:24,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-09-01 03:52:24,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:24,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-09-01 03:52:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:24,430 INFO L130 PetriNetUnfolder]: 467/734 cut-off events. [2023-09-01 03:52:24,430 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:52:24,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 734 events. 467/734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3480 event pairs, 266 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 1468. Up to 365 conditions per place. [2023-09-01 03:52:24,438 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 52 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-09-01 03:52:24,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 229 flow [2023-09-01 03:52:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-09-01 03:52:24,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 03:52:24,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-09-01 03:52:24,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-09-01 03:52:24,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:24,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-09-01 03:52:24,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,447 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 65 flow. Second operand 3 states and 418 transitions. [2023-09-01 03:52:24,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 229 flow [2023-09-01 03:52:24,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:24,460 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 76 flow [2023-09-01 03:52:24,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-09-01 03:52:24,462 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-09-01 03:52:24,462 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 76 flow [2023-09-01 03:52:24,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:24,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:52:24,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:24,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:24,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash 20514, now seen corresponding path program 1 times [2023-09-01 03:52:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779717756] [2023-09-01 03:52:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:24,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:24,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:52:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:52:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:24,769 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-09-01 03:52:24,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-09-01 03:52:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:24,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:24,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779717756] [2023-09-01 03:52:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779717756] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:24,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768302637] [2023-09-01 03:52:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:24,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-09-01 03:52:24,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:24,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:24,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-09-01 03:52:24,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:25,021 INFO L130 PetriNetUnfolder]: 323/532 cut-off events. [2023-09-01 03:52:25,022 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:52:25,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 532 events. 323/532 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 2439 event pairs, 184 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 1068. Up to 524 conditions per place. [2023-09-01 03:52:25,024 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 26 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 03:52:25,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 126 flow [2023-09-01 03:52:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-09-01 03:52:25,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41885964912280704 [2023-09-01 03:52:25,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-09-01 03:52:25,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-09-01 03:52:25,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:25,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-09-01 03:52:25,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:25,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:25,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:25,030 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 76 flow. Second operand 3 states and 382 transitions. [2023-09-01 03:52:25,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 126 flow [2023-09-01 03:52:25,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:25,032 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 72 flow [2023-09-01 03:52:25,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-09-01 03:52:25,033 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-09-01 03:52:25,033 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 72 flow [2023-09-01 03:52:25,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:25,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:25,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:52:25,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:25,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:25,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 636405, now seen corresponding path program 1 times [2023-09-01 03:52:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027766559] [2023-09-01 03:52:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:25,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:25,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:25,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:52:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:52:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:25,354 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:25,354 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:25,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027766559] [2023-09-01 03:52:25,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027766559] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:25,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:25,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:52:25,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121928998] [2023-09-01 03:52:25,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:25,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:52:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:52:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:52:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 304 [2023-09-01 03:52:25,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:25,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:25,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 304 [2023-09-01 03:52:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:26,360 INFO L130 PetriNetUnfolder]: 486/801 cut-off events. [2023-09-01 03:52:26,360 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:52:26,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 801 events. 486/801 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 3947 event pairs, 276 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1609. Up to 263 conditions per place. [2023-09-01 03:52:26,363 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 71 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-09-01 03:52:26,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 79 transitions, 344 flow [2023-09-01 03:52:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:52:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:52:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2023-09-01 03:52:26,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42598684210526316 [2023-09-01 03:52:26,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2023-09-01 03:52:26,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2023-09-01 03:52:26,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:26,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2023-09-01 03:52:26,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,370 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,370 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 72 flow. Second operand 6 states and 777 transitions. [2023-09-01 03:52:26,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 79 transitions, 344 flow [2023-09-01 03:52:26,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:26,371 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 125 flow [2023-09-01 03:52:26,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-09-01 03:52:26,372 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-09-01 03:52:26,372 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 125 flow [2023-09-01 03:52:26,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:26,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:52:26,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:26,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:26,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:26,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash 19729438, now seen corresponding path program 1 times [2023-09-01 03:52:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649059962] [2023-09-01 03:52:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:26,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:26,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:26,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:52:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:26,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:52:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:26,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:26,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649059962] [2023-09-01 03:52:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649059962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:26,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831904814] [2023-09-01 03:52:26,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:26,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:26,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 304 [2023-09-01 03:52:26,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:26,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 304 [2023-09-01 03:52:26,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:26,917 INFO L130 PetriNetUnfolder]: 450/861 cut-off events. [2023-09-01 03:52:26,917 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:52:26,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 861 events. 450/861 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5158 event pairs, 195 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1750. Up to 535 conditions per place. [2023-09-01 03:52:26,921 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 44 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-09-01 03:52:26,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 247 flow [2023-09-01 03:52:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-09-01 03:52:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-09-01 03:52:26,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-09-01 03:52:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-09-01 03:52:26,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:26,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-09-01 03:52:26,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,927 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 125 flow. Second operand 3 states and 412 transitions. [2023-09-01 03:52:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 247 flow [2023-09-01 03:52:26,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 237 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:26,929 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 131 flow [2023-09-01 03:52:26,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-09-01 03:52:26,930 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-09-01 03:52:26,930 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 131 flow [2023-09-01 03:52:26,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:26,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:26,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:52:26,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:27,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:27,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:27,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 19729451, now seen corresponding path program 1 times [2023-09-01 03:52:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:27,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354005865] [2023-09-01 03:52:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:27,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:27,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:27,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:52:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:52:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:52:27,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:52:27,230 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 03:52:27,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 03:52:27,239 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 14 treesize of output 12 [2023-09-01 03:52:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:27,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:27,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354005865] [2023-09-01 03:52:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354005865] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559341507] [2023-09-01 03:52:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:27,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:27,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-09-01 03:52:27,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:27,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-09-01 03:52:27,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:27,487 INFO L130 PetriNetUnfolder]: 411/780 cut-off events. [2023-09-01 03:52:27,487 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2023-09-01 03:52:27,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 780 events. 411/780 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 4460 event pairs, 339 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1767. Up to 774 conditions per place. [2023-09-01 03:52:27,491 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 30 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-09-01 03:52:27,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 189 flow [2023-09-01 03:52:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-09-01 03:52:27,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653508771929827 [2023-09-01 03:52:27,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-09-01 03:52:27,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-09-01 03:52:27,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:27,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-09-01 03:52:27,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,496 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 131 flow. Second operand 3 states and 389 transitions. [2023-09-01 03:52:27,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 189 flow [2023-09-01 03:52:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:27,498 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 127 flow [2023-09-01 03:52:27,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-09-01 03:52:27,499 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-09-01 03:52:27,499 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 127 flow [2023-09-01 03:52:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:27,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:52:27,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:27,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:27,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 19729449, now seen corresponding path program 1 times [2023-09-01 03:52:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:27,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530757175] [2023-09-01 03:52:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:27,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:27,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:52:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:52:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:27,821 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-09-01 03:52:27,821 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-09-01 03:52:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:27,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:27,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:27,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530757175] [2023-09-01 03:52:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530757175] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:27,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:27,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:52:27,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372302282] [2023-09-01 03:52:27,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:27,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-09-01 03:52:27,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:27,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-09-01 03:52:27,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:28,033 INFO L130 PetriNetUnfolder]: 372/699 cut-off events. [2023-09-01 03:52:28,034 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-09-01 03:52:28,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 699 events. 372/699 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3850 event pairs, 303 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1578. Up to 693 conditions per place. [2023-09-01 03:52:28,037 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 03:52:28,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 181 flow [2023-09-01 03:52:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-09-01 03:52:28,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-09-01 03:52:28,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-09-01 03:52:28,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-09-01 03:52:28,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:28,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-09-01 03:52:28,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:28,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:28,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:28,042 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 127 flow. Second operand 3 states and 378 transitions. [2023-09-01 03:52:28,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 181 flow [2023-09-01 03:52:28,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:28,044 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 124 flow [2023-09-01 03:52:28,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-09-01 03:52:28,045 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-09-01 03:52:28,045 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 124 flow [2023-09-01 03:52:28,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:52:28,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:28,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:28,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:28,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1781217458, now seen corresponding path program 2 times [2023-09-01 03:52:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415681355] [2023-09-01 03:52:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:52:28,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:28,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:28,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:52:28,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:52:28,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:52:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:28,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:28,403 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:28,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:29,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415681355] [2023-09-01 03:52:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415681355] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:29,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:29,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:52:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952174694] [2023-09-01 03:52:29,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:29,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:52:29,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:52:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:52:31,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-09-01 03:52:31,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 124 flow. Second operand has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:31,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:31,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-09-01 03:52:31,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:34,462 INFO L130 PetriNetUnfolder]: 1232/2314 cut-off events. [2023-09-01 03:52:34,462 INFO L131 PetriNetUnfolder]: For 288/288 co-relation queries the response was YES. [2023-09-01 03:52:34,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2314 events. 1232/2314 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14646 event pairs, 1010 based on Foata normal form. 6/1436 useless extension candidates. Maximal degree in co-relation 5203. Up to 521 conditions per place. [2023-09-01 03:52:34,474 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 202 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2023-09-01 03:52:34,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 215 transitions, 1104 flow [2023-09-01 03:52:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:52:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:52:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1614 transitions. [2023-09-01 03:52:34,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-09-01 03:52:34,480 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1614 transitions. [2023-09-01 03:52:34,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1614 transitions. [2023-09-01 03:52:34,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:34,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1614 transitions. [2023-09-01 03:52:34,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.5) internal successors, (1614), 12 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:34,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:34,491 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 304.0) internal successors, (3952), 13 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:34,492 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 124 flow. Second operand 12 states and 1614 transitions. [2023-09-01 03:52:34,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 215 transitions, 1104 flow [2023-09-01 03:52:34,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 215 transitions, 1103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:52:34,498 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 221 flow [2023-09-01 03:52:34,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=221, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-09-01 03:52:34,499 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-09-01 03:52:34,499 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 221 flow [2023-09-01 03:52:34,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 118.0) internal successors, (1416), 12 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:34,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:34,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:34,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:34,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:34,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash -650030388, now seen corresponding path program 1 times [2023-09-01 03:52:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444416473] [2023-09-01 03:52:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:34,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:34,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:52:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:52:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:34,817 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-09-01 03:52:34,818 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-09-01 03:52:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:34,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:34,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444416473] [2023-09-01 03:52:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444416473] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:52:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868261107] [2023-09-01 03:52:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:52:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:52:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:52:34,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-09-01 03:52:34,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:34,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:34,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-09-01 03:52:34,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:35,137 INFO L130 PetriNetUnfolder]: 712/1394 cut-off events. [2023-09-01 03:52:35,138 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 03:52:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1394 events. 712/1394 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8240 event pairs, 550 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 3174. Up to 1361 conditions per place. [2023-09-01 03:52:35,146 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 28 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-09-01 03:52:35,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 34 transitions, 279 flow [2023-09-01 03:52:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:52:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:52:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-09-01 03:52:35,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029605263157895 [2023-09-01 03:52:35,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-09-01 03:52:35,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-09-01 03:52:35,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:35,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-09-01 03:52:35,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,152 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 221 flow. Second operand 4 states and 490 transitions. [2023-09-01 03:52:35,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 34 transitions, 279 flow [2023-09-01 03:52:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 254 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:52:35,156 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 198 flow [2023-09-01 03:52:35,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-09-01 03:52:35,157 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2023-09-01 03:52:35,157 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 198 flow [2023-09-01 03:52:35,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:35,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:35,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:35,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:35,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -650030387, now seen corresponding path program 1 times [2023-09-01 03:52:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963913216] [2023-09-01 03:52:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:35,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:35,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:52:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:52:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:35,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:35,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:35,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963913216] [2023-09-01 03:52:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963913216] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:35,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:52:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000725212] [2023-09-01 03:52:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:35,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:52:35,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:52:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:52:35,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 304 [2023-09-01 03:52:35,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:35,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 304 [2023-09-01 03:52:35,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:35,667 INFO L130 PetriNetUnfolder]: 712/1374 cut-off events. [2023-09-01 03:52:35,668 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-09-01 03:52:35,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1374 events. 712/1374 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7370 event pairs, 370 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 3147. Up to 995 conditions per place. [2023-09-01 03:52:35,674 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-09-01 03:52:35,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 300 flow [2023-09-01 03:52:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:52:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:52:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-09-01 03:52:35,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-09-01 03:52:35,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-09-01 03:52:35,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-09-01 03:52:35,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:35,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-09-01 03:52:35,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,679 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 198 flow. Second operand 3 states and 402 transitions. [2023-09-01 03:52:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 300 flow [2023-09-01 03:52:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:52:35,680 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 200 flow [2023-09-01 03:52:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-09-01 03:52:35,681 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-09-01 03:52:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 200 flow [2023-09-01 03:52:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:35,704 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 (12)] Ended with exit code 0 [2023-09-01 03:52:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:35,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:35,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash -650030386, now seen corresponding path program 1 times [2023-09-01 03:52:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:35,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230265725] [2023-09-01 03:52:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:35,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:35,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:52:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:52:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:36,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:36,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230265725] [2023-09-01 03:52:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230265725] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:36,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:52:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798580892] [2023-09-01 03:52:36,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:52:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:36,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:52:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:52:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 304 [2023-09-01 03:52:36,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:36,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:36,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 304 [2023-09-01 03:52:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:36,292 INFO L130 PetriNetUnfolder]: 596/1178 cut-off events. [2023-09-01 03:52:36,293 INFO L131 PetriNetUnfolder]: For 384/422 co-relation queries the response was YES. [2023-09-01 03:52:36,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1178 events. 596/1178 cut-off events. For 384/422 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6646 event pairs, 450 based on Foata normal form. 42/1020 useless extension candidates. Maximal degree in co-relation 2905. Up to 1130 conditions per place. [2023-09-01 03:52:36,297 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-09-01 03:52:36,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 319 flow [2023-09-01 03:52:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:52:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:52:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-09-01 03:52:36,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251644736842105 [2023-09-01 03:52:36,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-09-01 03:52:36,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-09-01 03:52:36,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:36,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-09-01 03:52:36,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:36,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:36,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:36,303 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 200 flow. Second operand 4 states and 517 transitions. [2023-09-01 03:52:36,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 319 flow [2023-09-01 03:52:36,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:52:36,305 INFO L231 Difference]: Finished difference. Result has 58 places, 35 transitions, 219 flow [2023-09-01 03:52:36,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=35} [2023-09-01 03:52:36,306 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-09-01 03:52:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 35 transitions, 219 flow [2023-09-01 03:52:36,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:36,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:36,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:36,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 03:52:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:36,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:36,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1975109973, now seen corresponding path program 1 times [2023-09-01 03:52:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338331071] [2023-09-01 03:52:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:36,514 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:36,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:52:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:52:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:36,650 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:36,651 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:36,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:37,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:37,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338331071] [2023-09-01 03:52:37,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338331071] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:37,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:37,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:52:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52358093] [2023-09-01 03:52:37,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:52:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:52:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:52:42,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-09-01 03:52:42,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 35 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:42,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:42,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-09-01 03:52:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:44,300 INFO L130 PetriNetUnfolder]: 494/998 cut-off events. [2023-09-01 03:52:44,300 INFO L131 PetriNetUnfolder]: For 435/475 co-relation queries the response was YES. [2023-09-01 03:52:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 998 events. 494/998 cut-off events. For 435/475 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5561 event pairs, 366 based on Foata normal form. 94/1044 useless extension candidates. Maximal degree in co-relation 2569. Up to 745 conditions per place. [2023-09-01 03:52:44,305 INFO L137 encePairwiseOnDemand]: 297/304 looper letters, 59 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2023-09-01 03:52:44,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 472 flow [2023-09-01 03:52:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:52:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:52:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1187 transitions. [2023-09-01 03:52:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904605263157895 [2023-09-01 03:52:44,309 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1187 transitions. [2023-09-01 03:52:44,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1187 transitions. [2023-09-01 03:52:44,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:44,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1187 transitions. [2023-09-01 03:52:44,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.7) internal successors, (1187), 10 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:44,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:44,314 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:44,314 INFO L175 Difference]: Start difference. First operand has 58 places, 35 transitions, 219 flow. Second operand 10 states and 1187 transitions. [2023-09-01 03:52:44,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 472 flow [2023-09-01 03:52:44,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 462 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:52:44,319 INFO L231 Difference]: Finished difference. Result has 67 places, 36 transitions, 257 flow [2023-09-01 03:52:44,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=67, PETRI_TRANSITIONS=36} [2023-09-01 03:52:44,320 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2023-09-01 03:52:44,320 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 36 transitions, 257 flow [2023-09-01 03:52:44,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.75) internal successors, (910), 8 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:44,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:44,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:44,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:44,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:44,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:44,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1699340814, now seen corresponding path program 2 times [2023-09-01 03:52:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132794791] [2023-09-01 03:52:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:52:44,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:44,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:44,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:52:44,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:52:44,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:52:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:44,703 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:44,703 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:52:44,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:52:44,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132794791] [2023-09-01 03:52:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132794791] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:52:44,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:52:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:52:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378769222] [2023-09-01 03:52:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:52:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:52:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:52:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:52:44,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 304 [2023-09-01 03:52:44,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 36 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:44,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:44,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 304 [2023-09-01 03:52:44,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:45,020 INFO L130 PetriNetUnfolder]: 290/638 cut-off events. [2023-09-01 03:52:45,020 INFO L131 PetriNetUnfolder]: For 1071/1099 co-relation queries the response was YES. [2023-09-01 03:52:45,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 638 events. 290/638 cut-off events. For 1071/1099 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3325 event pairs, 198 based on Foata normal form. 160/798 useless extension candidates. Maximal degree in co-relation 1645. Up to 605 conditions per place. [2023-09-01 03:52:45,023 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 25 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2023-09-01 03:52:45,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 33 transitions, 297 flow [2023-09-01 03:52:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:52:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:52:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-09-01 03:52:45,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037828947368421 [2023-09-01 03:52:45,025 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-09-01 03:52:45,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-09-01 03:52:45,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:52:45,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-09-01 03:52:45,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 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) [2023-09-01 03:52:45,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:45,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:45,027 INFO L175 Difference]: Start difference. First operand has 67 places, 36 transitions, 257 flow. Second operand 4 states and 491 transitions. [2023-09-01 03:52:45,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 33 transitions, 297 flow [2023-09-01 03:52:45,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 33 transitions, 242 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-09-01 03:52:45,029 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 192 flow [2023-09-01 03:52:45,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2023-09-01 03:52:45,030 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-09-01 03:52:45,030 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 192 flow [2023-09-01 03:52:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:45,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:45,030 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:52:45,039 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 (15)] Ended with exit code 0 [2023-09-01 03:52:45,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:45,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:52:45,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2125848110, now seen corresponding path program 3 times [2023-09-01 03:52:45,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:52:45,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303288469] [2023-09-01 03:52:45,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:52:45,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:52:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:52:45,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:52:45,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:52:45,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:52:45,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:52:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:45,428 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-09-01 03:52:45,428 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-09-01 03:52:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:45,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:47,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:47,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303288469] [2023-09-01 03:52:47,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303288469] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:47,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:47,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:52:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293577159] [2023-09-01 03:52:47,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:47,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:52:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:52:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:52:56,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 304 [2023-09-01 03:52:56,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 192 flow. Second operand has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:56,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:56,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 304 [2023-09-01 03:52:56,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:08,101 INFO L130 PetriNetUnfolder]: 662/1442 cut-off events. [2023-09-01 03:53:08,102 INFO L131 PetriNetUnfolder]: For 830/830 co-relation queries the response was YES. [2023-09-01 03:53:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 1442 events. 662/1442 cut-off events. For 830/830 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7999 event pairs, 450 based on Foata normal form. 12/1452 useless extension candidates. Maximal degree in co-relation 3566. Up to 337 conditions per place. [2023-09-01 03:53:08,108 INFO L137 encePairwiseOnDemand]: 300/304 looper letters, 307 selfloop transitions, 24 changer transitions 0/332 dead transitions. [2023-09-01 03:53:08,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 332 transitions, 1904 flow [2023-09-01 03:53:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:53:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:53:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3130 transitions. [2023-09-01 03:53:08,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290021929824561 [2023-09-01 03:53:08,133 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3130 transitions. [2023-09-01 03:53:08,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3130 transitions. [2023-09-01 03:53:08,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:08,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3130 transitions. [2023-09-01 03:53:08,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 130.41666666666666) internal successors, (3130), 24 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,156 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 304.0) internal successors, (7600), 25 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,164 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 192 flow. Second operand 24 states and 3130 transitions. [2023-09-01 03:53:08,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 332 transitions, 1904 flow [2023-09-01 03:53:08,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 332 transitions, 1879 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:53:08,170 INFO L231 Difference]: Finished difference. Result has 89 places, 46 transitions, 371 flow [2023-09-01 03:53:08,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=371, PETRI_PLACES=89, PETRI_TRANSITIONS=46} [2023-09-01 03:53:08,171 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2023-09-01 03:53:08,171 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 46 transitions, 371 flow [2023-09-01 03:53:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.0) internal successors, (2832), 24 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:08,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:53:08,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:08,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:08,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:08,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1203095455, now seen corresponding path program 1 times [2023-09-01 03:53:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:08,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178782040] [2023-09-01 03:53:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:53:08,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:08,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:53:08,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:53:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:53:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:53:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:08,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:53:08,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178782040] [2023-09-01 03:53:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178782040] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:53:08,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:53:08,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:53:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764570259] [2023-09-01 03:53:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:53:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:53:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:53:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:53:08,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 304 [2023-09-01 03:53:08,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 46 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:53:08,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 304 [2023-09-01 03:53:08,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:08,772 INFO L130 PetriNetUnfolder]: 998/2029 cut-off events. [2023-09-01 03:53:08,772 INFO L131 PetriNetUnfolder]: For 694/694 co-relation queries the response was YES. [2023-09-01 03:53:08,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5049 conditions, 2029 events. 998/2029 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11535 event pairs, 450 based on Foata normal form. 43/1986 useless extension candidates. Maximal degree in co-relation 5011. Up to 1271 conditions per place. [2023-09-01 03:53:08,782 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 46 selfloop transitions, 2 changer transitions 5/54 dead transitions. [2023-09-01 03:53:08,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 54 transitions, 499 flow [2023-09-01 03:53:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:53:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:53:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-09-01 03:53:08,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418859649122807 [2023-09-01 03:53:08,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-09-01 03:53:08,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-09-01 03:53:08,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:08,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-09-01 03:53:08,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,811 INFO L175 Difference]: Start difference. First operand has 89 places, 46 transitions, 371 flow. Second operand 3 states and 403 transitions. [2023-09-01 03:53:08,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 54 transitions, 499 flow [2023-09-01 03:53:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 54 transitions, 451 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-09-01 03:53:08,814 INFO L231 Difference]: Finished difference. Result has 82 places, 46 transitions, 329 flow [2023-09-01 03:53:08,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=46} [2023-09-01 03:53:08,815 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2023-09-01 03:53:08,816 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 46 transitions, 329 flow [2023-09-01 03:53:08,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:08,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:08,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:08,823 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 [2023-09-01 03:53:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:09,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:09,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash -540375072, now seen corresponding path program 1 times [2023-09-01 03:53:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:09,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237126465] [2023-09-01 03:53:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:53:09,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:09,025 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:53:09,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:53:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:53:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:53:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:09,178 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 [2023-09-01 03:53:09,190 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 10 treesize of output 8 [2023-09-01 03:53:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:53:09,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:09,424 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 166 treesize of output 162 [2023-09-01 03:53:09,602 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:53:09,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 258 treesize of output 166 [2023-09-01 03:53:09,611 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 92 treesize of output 88 [2023-09-01 03:53:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:53:11,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237126465] [2023-09-01 03:53:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237126465] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:53:11,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:53:11,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:53:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065770324] [2023-09-01 03:53:11,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:53:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:53:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:53:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:53:11,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 304 [2023-09-01 03:53:11,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 46 transitions, 329 flow. Second operand has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:11,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:53:11,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 304 [2023-09-01 03:53:11,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:12,582 INFO L130 PetriNetUnfolder]: 1383/2687 cut-off events. [2023-09-01 03:53:12,583 INFO L131 PetriNetUnfolder]: For 649/649 co-relation queries the response was YES. [2023-09-01 03:53:12,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 2687 events. 1383/2687 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 14935 event pairs, 60 based on Foata normal form. 20/2707 useless extension candidates. Maximal degree in co-relation 6910. Up to 721 conditions per place. [2023-09-01 03:53:12,591 INFO L137 encePairwiseOnDemand]: 299/304 looper letters, 50 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2023-09-01 03:53:12,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 536 flow [2023-09-01 03:53:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:53:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:53:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-09-01 03:53:12,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963815789473684 [2023-09-01 03:53:12,594 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-09-01 03:53:12,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-09-01 03:53:12,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:12,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-09-01 03:53:12,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:12,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:12,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 304.0) internal successors, (2128), 7 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:12,597 INFO L175 Difference]: Start difference. First operand has 82 places, 46 transitions, 329 flow. Second operand 6 states and 723 transitions. [2023-09-01 03:53:12,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 536 flow [2023-09-01 03:53:12,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 71 transitions, 532 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:53:12,603 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 347 flow [2023-09-01 03:53:12,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2023-09-01 03:53:12,604 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2023-09-01 03:53:12,604 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 347 flow [2023-09-01 03:53:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:12,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:12,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:12,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:53:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:12,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:12,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -702120888, now seen corresponding path program 2 times [2023-09-01 03:53:12,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37729798] [2023-09-01 03:53:12,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:53:12,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:12,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:12,814 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:53:12,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:53:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:53:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:53:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:53:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:13,047 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 [2023-09-01 03:53:13,054 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 10 treesize of output 8 [2023-09-01 03:53:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:13,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:53:13,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 188 [2023-09-01 03:53:13,372 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 188 treesize of output 184 [2023-09-01 03:53:13,378 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 184 treesize of output 180 [2023-09-01 03:53:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:53:13,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:53:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37729798] [2023-09-01 03:53:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37729798] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:53:13,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:53:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2023-09-01 03:53:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865615078] [2023-09-01 03:53:13,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:53:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 03:53:13,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:53:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 03:53:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-09-01 03:53:14,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 304 [2023-09-01 03:53:14,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 347 flow. Second operand has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:14,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:53:14,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 304 [2023-09-01 03:53:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:15,448 INFO L130 PetriNetUnfolder]: 2719/5282 cut-off events. [2023-09-01 03:53:15,448 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2023-09-01 03:53:15,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 5282 events. 2719/5282 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 34372 event pairs, 820 based on Foata normal form. 168/5450 useless extension candidates. Maximal degree in co-relation 13838. Up to 2015 conditions per place. [2023-09-01 03:53:15,468 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 56 selfloop transitions, 9 changer transitions 29/94 dead transitions. [2023-09-01 03:53:15,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 688 flow [2023-09-01 03:53:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:53:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:53:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1189 transitions. [2023-09-01 03:53:15,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39111842105263156 [2023-09-01 03:53:15,474 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1189 transitions. [2023-09-01 03:53:15,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1189 transitions. [2023-09-01 03:53:15,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:15,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1189 transitions. [2023-09-01 03:53:15,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.9) internal successors, (1189), 10 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:15,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:15,479 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 304.0) internal successors, (3344), 11 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:15,479 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 347 flow. Second operand 10 states and 1189 transitions. [2023-09-01 03:53:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 688 flow [2023-09-01 03:53:15,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 670 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 03:53:15,491 INFO L231 Difference]: Finished difference. Result has 94 places, 51 transitions, 409 flow [2023-09-01 03:53:15,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=51} [2023-09-01 03:53:15,491 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 57 predicate places. [2023-09-01 03:53:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 51 transitions, 409 flow [2023-09-01 03:53:15,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.23076923076923) internal successors, (1485), 13 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:15,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:53:15,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:53:15,502 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 [2023-09-01 03:53:15,705 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 [2023-09-01 03:53:15,705 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-09-01 03:53:15,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:53:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1517803675, now seen corresponding path program 3 times [2023-09-01 03:53:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:53:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380494395] [2023-09-01 03:53:15,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:53:15,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:53:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:53:15,707 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) [2023-09-01 03:53:15,709 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 [2023-09-01 03:53:15,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:53:15,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:53:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:53:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:53:16,238 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 [2023-09-01 03:53:16,251 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 20 treesize of output 16 [2023-09-01 03:53:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:53:16,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:53:26,353 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-09-01 03:53:26,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 676 treesize of output 532 [2023-09-01 03:53:26,376 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 285 treesize of output 277 [2023-09-01 03:53:26,394 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 277 treesize of output 269 [2023-09-01 03:55:26,129 WARN L222 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 3398 DAG size of output: 3399 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 03:57:12,908 WARN L222 SmtUtils]: Spent 23.99s on a formula simplification. DAG size of input: 5649 DAG size of output: 5808 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:00:45,806 WARN L222 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 9973 DAG size of output: 9976 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 04:01:03,535 WARN L222 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 9439 DAG size of output: 9439 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15