./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:55:04,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:55:04,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:55:04,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:55:04,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:55:04,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:55:04,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:55:04,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:55:04,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:55:04,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:55:04,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:55:04,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:55:04,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:55:04,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:55:04,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:55:04,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:55:04,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:55:04,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:55:04,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:55:04,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:55:04,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:55:04,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:55:04,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:55:04,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:55:04,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:55:04,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:55:04,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:55:04,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:55:04,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:55:04,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:55:04,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:55:04,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:55:04,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:55:04,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:55:04,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:55:04,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:55:04,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:55:04,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:55:04,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:55:04,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:55:04,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:55:04,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:55:04,899 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:55:04,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:55:04,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:55:04,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:55:04,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:55:04,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:55:04,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:55:04,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:55:04,902 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:55:04,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:55:04,903 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:55:04,903 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:55:04,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:55:04,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:55:04,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:55:04,904 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:55:04,904 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:55:04,904 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:55:04,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:55:04,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:55:04,905 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:55:04,905 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:55:04,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:55:04,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:55:04,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:55:04,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:04,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:55:04,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:55:04,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:55:04,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:55:04,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:55:04,907 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:55:04,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:55:04,907 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:55:04,908 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:55:05,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:55:05,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:55:05,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:55:05,231 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:55:05,231 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:55:05,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 05:55:06,368 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:55:06,551 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:55:06,552 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 05:55:06,557 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3a8f0b0/c885be672d984f5b88fa2e53eb0d2be3/FLAGd15e69919 [2023-08-30 05:55:06,567 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3a8f0b0/c885be672d984f5b88fa2e53eb0d2be3 [2023-08-30 05:55:06,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:55:06,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:55:06,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:06,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:55:06,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:55:06,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:06" (1/1) ... [2023-08-30 05:55:06,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:06, skipping insertion in model container [2023-08-30 05:55:06,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:06" (1/1) ... [2023-08-30 05:55:06,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:55:06,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:06,752 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 05:55:06,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:06,769 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 05:55:06,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26c856d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:06, skipping insertion in model container [2023-08-30 05:55:06,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:06,777 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:55:06,779 INFO L158 Benchmark]: Toolchain (without parser) took 206.77ms. Allocated memory is still 67.1MB. Free memory was 40.3MB in the beginning and 30.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:55:06,779 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:55:06,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.66ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 30.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:55:06,781 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 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.66ms. Allocated memory is still 67.1MB. Free memory was 40.1MB in the beginning and 30.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 145]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:55:08,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:55:08,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:55:08,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:55:08,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:55:08,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:55:08,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:55:08,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:55:08,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:55:08,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:55:08,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:55:08,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:55:08,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:55:08,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:55:08,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:55:08,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:55:08,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:55:08,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:55:08,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:55:08,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:55:08,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:55:08,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:55:08,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:55:08,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:55:08,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:55:08,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:55:08,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:55:08,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:55:08,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:55:08,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:55:08,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:55:08,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:55:08,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:55:08,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:55:08,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:55:08,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:55:08,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:55:08,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:55:08,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:55:08,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:55:08,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:55:08,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:55:08,577 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:55:08,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:55:08,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:55:08,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:55:08,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:55:08,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:55:08,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:55:08,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:55:08,580 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:55:08,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:55:08,581 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:55:08,581 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:55:08,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:55:08,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:55:08,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:55:08,583 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:55:08,583 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:55:08,583 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:55:08,583 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:55:08,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:55:08,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:55:08,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:55:08,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:08,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:55:08,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:55:08,585 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:55:08,585 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:55:08,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:55:08,585 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:55:08,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:55:08,586 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:55:08,586 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:55:08,586 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:55:08,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:55:08,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:55:08,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:55:08,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:55:08,894 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:55:08,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 05:55:10,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:55:10,316 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:55:10,317 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 05:55:10,325 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de66080e4/a485b2193a9c41849d63ace05a035408/FLAGd8478b58e [2023-08-30 05:55:10,336 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de66080e4/a485b2193a9c41849d63ace05a035408 [2023-08-30 05:55:10,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:55:10,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:55:10,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:10,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:55:10,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:55:10,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@958a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10, skipping insertion in model container [2023-08-30 05:55:10,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:55:10,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:10,571 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 05:55:10,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:10,606 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:55:10,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:55:10,645 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 05:55:10,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:10,675 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:55:10,709 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 05:55:10,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:55:10,729 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:55:10,731 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:55:10,737 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:55:10,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10 WrapperNode [2023-08-30 05:55:10,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:55:10,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:55:10,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:55:10,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:55:10,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,809 INFO L138 Inliner]: procedures = 29, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2023-08-30 05:55:10,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:55:10,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:55:10,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:55:10,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:55:10,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:55:10,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:55:10,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:55:10,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:55:10,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (1/1) ... [2023-08-30 05:55:10,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:55:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:55:10,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 05:55:10,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 05:55:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:55:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:55:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:55:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:55:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:55:10,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:55:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:55:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:55:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:55:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:55:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 05:55:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 05:55:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:55:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:55:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:55:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:55:10,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:55:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:55:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:55:10,935 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:55:11,044 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:55:11,046 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:55:11,650 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:55:11,931 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:55:11,933 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 05:55:11,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:11 BoogieIcfgContainer [2023-08-30 05:55:11,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:55:11,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:55:11,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:55:11,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:55:11,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:55:10" (1/3) ... [2023-08-30 05:55:11,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4970cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:11, skipping insertion in model container [2023-08-30 05:55:11,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:55:10" (2/3) ... [2023-08-30 05:55:11,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4970cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:55:11, skipping insertion in model container [2023-08-30 05:55:11,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:55:11" (3/3) ... [2023-08-30 05:55:11,944 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-08-30 05:55:11,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:55:11,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 05:55:11,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:55:12,082 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 05:55:12,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 226 transitions, 484 flow [2023-08-30 05:55:12,230 INFO L130 PetriNetUnfolder]: 15/222 cut-off events. [2023-08-30 05:55:12,231 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 05:55:12,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 15/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-30 05:55:12,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 226 transitions, 484 flow [2023-08-30 05:55:12,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 218 transitions, 460 flow [2023-08-30 05:55:12,253 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:55:12,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 218 transitions, 460 flow [2023-08-30 05:55:12,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 218 transitions, 460 flow [2023-08-30 05:55:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 218 transitions, 460 flow [2023-08-30 05:55:12,319 INFO L130 PetriNetUnfolder]: 15/218 cut-off events. [2023-08-30 05:55:12,319 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 05:55:12,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 15/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 222 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-08-30 05:55:12,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2023-08-30 05:55:35,277 INFO L134 LiptonReduction]: Checked pairs total: 8490 [2023-08-30 05:55:35,278 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-30 05:55:35,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:55:35,295 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;@4b4b4179, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:55:35,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-30 05:55:35,298 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:55:35,298 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:35,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:35,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:55:35,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:35,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash 36328, now seen corresponding path program 1 times [2023-08-30 05:55:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479509909] [2023-08-30 05:55:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:35,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:35,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 05:55:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:55:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:35,629 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 05:55:35,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 05:55:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:35,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:35,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479509909] [2023-08-30 05:55:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479509909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:35,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:35,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168059110] [2023-08-30 05:55:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:35,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-30 05:55:35,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:35,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:35,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-30 05:55:35,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:37,766 INFO L130 PetriNetUnfolder]: 12817/16564 cut-off events. [2023-08-30 05:55:37,766 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 05:55:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33602 conditions, 16564 events. 12817/16564 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 75502 event pairs, 10128 based on Foata normal form. 0/6626 useless extension candidates. Maximal degree in co-relation 28740. Up to 16564 conditions per place. [2023-08-30 05:55:37,888 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-30 05:55:37,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 248 flow [2023-08-30 05:55:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-30 05:55:37,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408133623819898 [2023-08-30 05:55:37,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-30 05:55:37,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-30 05:55:37,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:37,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-30 05:55:37,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:37,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:37,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:37,925 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 140 flow. Second operand 3 states and 607 transitions. [2023-08-30 05:55:37,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 248 flow [2023-08-30 05:55:37,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 05:55:37,938 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 122 flow [2023-08-30 05:55:37,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-30 05:55:37,943 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-08-30 05:55:37,943 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 122 flow [2023-08-30 05:55:37,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:37,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:37,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:55:37,952 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 (2)] Ended with exit code 0 [2023-08-30 05:55:38,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:38,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:38,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 36329, now seen corresponding path program 1 times [2023-08-30 05:55:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361485545] [2023-08-30 05:55:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:38,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:38,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:38,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 05:55:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:55:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:38,465 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:55:38,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:55:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:38,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:38,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361485545] [2023-08-30 05:55:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361485545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:38,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:38,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:38,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935710865] [2023-08-30 05:55:38,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:38,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:38,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-30 05:55:38,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:38,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:38,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-30 05:55:38,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:41,446 INFO L130 PetriNetUnfolder]: 25633/33126 cut-off events. [2023-08-30 05:55:41,447 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66568 conditions, 33126 events. 25633/33126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 165092 event pairs, 20256 based on Foata normal form. 0/13251 useless extension candidates. Maximal degree in co-relation 66562. Up to 16565 conditions per place. [2023-08-30 05:55:41,594 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 108 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-30 05:55:41,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 458 flow [2023-08-30 05:55:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2023-08-30 05:55:41,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793028322440087 [2023-08-30 05:55:41,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2023-08-30 05:55:41,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2023-08-30 05:55:41,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:41,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2023-08-30 05:55:41,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:41,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:41,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:41,604 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 122 flow. Second operand 3 states and 660 transitions. [2023-08-30 05:55:41,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 458 flow [2023-08-30 05:55:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:41,608 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 133 flow [2023-08-30 05:55:41,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2023-08-30 05:55:41,609 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-08-30 05:55:41,610 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 133 flow [2023-08-30 05:55:41,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:41,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:41,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:55:41,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:55:41,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:41,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:41,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash 36403, now seen corresponding path program 1 times [2023-08-30 05:55:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:41,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504744124] [2023-08-30 05:55:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:41,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:41,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:41,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:41,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 05:55:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:55:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:42,006 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-08-30 05:55:42,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-30 05:55:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:42,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:42,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:42,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504744124] [2023-08-30 05:55:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504744124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:42,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43173859] [2023-08-30 05:55:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:42,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:42,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-30 05:55:42,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:42,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:42,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-30 05:55:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:44,252 INFO L130 PetriNetUnfolder]: 20633/26874 cut-off events. [2023-08-30 05:55:44,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:44,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54070 conditions, 26874 events. 20633/26874 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 131888 event pairs, 16256 based on Foata normal form. 0/11253 useless extension candidates. Maximal degree in co-relation 54062. Up to 26874 conditions per place. [2023-08-30 05:55:44,384 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 05:55:44,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 239 flow [2023-08-30 05:55:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 05:55:44,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439360929557008 [2023-08-30 05:55:44,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 05:55:44,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 05:55:44,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:44,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 05:55:44,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:44,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:44,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:44,393 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 133 flow. Second operand 3 states and 605 transitions. [2023-08-30 05:55:44,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 239 flow [2023-08-30 05:55:44,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:44,395 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 129 flow [2023-08-30 05:55:44,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-30 05:55:44,396 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2023-08-30 05:55:44,396 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 129 flow [2023-08-30 05:55:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:44,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:44,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:55:44,411 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 (4)] Ended with exit code 0 [2023-08-30 05:55:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:44,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:44,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash 36404, now seen corresponding path program 1 times [2023-08-30 05:55:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:44,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396720303] [2023-08-30 05:55:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:44,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:44,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:44,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:44,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 05:55:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:55:44,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:44,864 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 05:55:44,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-08-30 05:55:44,903 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-08-30 05:55:44,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-08-30 05:55:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:44,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:44,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396720303] [2023-08-30 05:55:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396720303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:44,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29104177] [2023-08-30 05:55:44,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:45,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-30 05:55:45,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:45,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:45,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-30 05:55:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:46,392 INFO L130 PetriNetUnfolder]: 15633/20622 cut-off events. [2023-08-30 05:55:46,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:46,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41566 conditions, 20622 events. 15633/20622 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 99651 event pairs, 12256 based on Foata normal form. 0/9253 useless extension candidates. Maximal degree in co-relation 41557. Up to 20622 conditions per place. [2023-08-30 05:55:46,473 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 05:55:46,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 231 flow [2023-08-30 05:55:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-30 05:55:46,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422657952069717 [2023-08-30 05:55:46,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-30 05:55:46,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-30 05:55:46,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:46,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-30 05:55:46,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:46,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:46,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:46,481 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 129 flow. Second operand 3 states and 609 transitions. [2023-08-30 05:55:46,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 231 flow [2023-08-30 05:55:46,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:46,483 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 126 flow [2023-08-30 05:55:46,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-30 05:55:46,484 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-08-30 05:55:46,485 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 126 flow [2023-08-30 05:55:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:46,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:55:46,497 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 [2023-08-30 05:55:46,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:46,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:46,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1128707, now seen corresponding path program 1 times [2023-08-30 05:55:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:46,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507951769] [2023-08-30 05:55:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:46,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:46,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 05:55:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:55:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:46,952 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:55:46,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:55:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:47,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:55:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:47,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507951769] [2023-08-30 05:55:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507951769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:55:47,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:55:47,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:55:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918914073] [2023-08-30 05:55:47,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:55:47,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:55:47,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:55:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:55:47,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-08-30 05:55:47,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:47,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:47,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-08-30 05:55:47,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:50,219 INFO L130 PetriNetUnfolder]: 23451/30936 cut-off events. [2023-08-30 05:55:50,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:55:50,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62354 conditions, 30936 events. 23451/30936 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157766 event pairs, 18384 based on Foata normal form. 0/13883 useless extension candidates. Maximal degree in co-relation 62344. Up to 10312 conditions per place. [2023-08-30 05:55:50,361 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 149 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2023-08-30 05:55:50,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 156 transitions, 666 flow [2023-08-30 05:55:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:55:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:55:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2023-08-30 05:55:50,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455337690631808 [2023-08-30 05:55:50,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2023-08-30 05:55:50,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2023-08-30 05:55:50,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:50,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2023-08-30 05:55:50,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:50,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:50,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:50,376 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 126 flow. Second operand 6 states and 1227 transitions. [2023-08-30 05:55:50,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 156 transitions, 666 flow [2023-08-30 05:55:50,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 156 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:50,380 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 179 flow [2023-08-30 05:55:50,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-30 05:55:50,381 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-30 05:55:50,381 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 179 flow [2023-08-30 05:55:50,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:50,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:50,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:55:50,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 05:55:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:50,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:50,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 35010167, now seen corresponding path program 1 times [2023-08-30 05:55:50,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:50,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227196158] [2023-08-30 05:55:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:50,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:50,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 05:55:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:55:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:50,773 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 05:55:50,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 05:55:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:50,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:50,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227196158] [2023-08-30 05:55:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227196158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:55:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610042765] [2023-08-30 05:55:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:55:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:55:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:55:50,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 459 [2023-08-30 05:55:50,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:50,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:50,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 459 [2023-08-30 05:55:50,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:52,158 INFO L130 PetriNetUnfolder]: 10854/14421 cut-off events. [2023-08-30 05:55:52,158 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:55:52,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29137 conditions, 14421 events. 10854/14421 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66097 event pairs, 7947 based on Foata normal form. 0/7605 useless extension candidates. Maximal degree in co-relation 29122. Up to 14414 conditions per place. [2023-08-30 05:55:52,206 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-30 05:55:52,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 279 flow [2023-08-30 05:55:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:55:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:55:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 776 transitions. [2023-08-30 05:55:52,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-08-30 05:55:52,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 776 transitions. [2023-08-30 05:55:52,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 776 transitions. [2023-08-30 05:55:52,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:52,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 776 transitions. [2023-08-30 05:55:52,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,213 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 179 flow. Second operand 4 states and 776 transitions. [2023-08-30 05:55:52,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 279 flow [2023-08-30 05:55:52,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 269 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:52,215 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 169 flow [2023-08-30 05:55:52,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-30 05:55:52,216 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-30 05:55:52,216 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 169 flow [2023-08-30 05:55:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:52,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:52,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:55:52,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 05:55:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:52,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:52,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 35010169, now seen corresponding path program 1 times [2023-08-30 05:55:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:52,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932175094] [2023-08-30 05:55:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:52,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:52,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 05:55:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:55:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:52,689 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-30 05:55:52,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-30 05:55:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:52,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:52,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932175094] [2023-08-30 05:55:52,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932175094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:52,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:52,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:55:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485792810] [2023-08-30 05:55:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:52,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:55:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:55:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:55:53,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-30 05:55:53,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:53,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:53,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-30 05:55:53,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:54,443 INFO L130 PetriNetUnfolder]: 14478/19323 cut-off events. [2023-08-30 05:55:54,444 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-30 05:55:54,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39009 conditions, 19323 events. 14478/19323 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 99034 event pairs, 2571 based on Foata normal form. 0/10155 useless extension candidates. Maximal degree in co-relation 38993. Up to 15241 conditions per place. [2023-08-30 05:55:54,514 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 87 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-08-30 05:55:54,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 440 flow [2023-08-30 05:55:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:55:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:55:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-08-30 05:55:54,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384531590413943 [2023-08-30 05:55:54,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-08-30 05:55:54,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-08-30 05:55:54,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:54,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-08-30 05:55:54,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:54,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:54,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:54,522 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 169 flow. Second operand 4 states and 805 transitions. [2023-08-30 05:55:54,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 440 flow [2023-08-30 05:55:54,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:55:54,525 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 193 flow [2023-08-30 05:55:54,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-30 05:55:54,526 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-30 05:55:54,526 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 193 flow [2023-08-30 05:55:54,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:54,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:54,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:55:54,541 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 [2023-08-30 05:55:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:54,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:54,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash 35010198, now seen corresponding path program 1 times [2023-08-30 05:55:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377061103] [2023-08-30 05:55:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:54,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:54,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:54,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:54,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 05:55:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:55:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:54,903 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-08-30 05:55:54,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2023-08-30 05:55:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:55,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:55,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:55,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377061103] [2023-08-30 05:55:55,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377061103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:55,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:55,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760731577] [2023-08-30 05:55:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:55,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:55,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:55,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-30 05:55:55,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:55,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:55,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-30 05:55:55,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:56,390 INFO L130 PetriNetUnfolder]: 13596/18135 cut-off events. [2023-08-30 05:55:56,390 INFO L131 PetriNetUnfolder]: For 2160/2160 co-relation queries the response was YES. [2023-08-30 05:55:56,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40995 conditions, 18135 events. 13596/18135 cut-off events. For 2160/2160 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 85611 event pairs, 9576 based on Foata normal form. 0/11892 useless extension candidates. Maximal degree in co-relation 40978. Up to 18135 conditions per place. [2023-08-30 05:55:56,462 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 53 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 05:55:56,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 297 flow [2023-08-30 05:55:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 05:55:56,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-30 05:55:56,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 05:55:56,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 05:55:56,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:56,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 05:55:56,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:56,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:56,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:56,469 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 193 flow. Second operand 3 states and 597 transitions. [2023-08-30 05:55:56,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 297 flow [2023-08-30 05:55:56,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:55:56,471 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 184 flow [2023-08-30 05:55:56,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-30 05:55:56,472 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-30 05:55:56,472 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 184 flow [2023-08-30 05:55:56,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:56,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:56,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 05:55:56,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 05:55:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:56,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:56,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 35010200, now seen corresponding path program 1 times [2023-08-30 05:55:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:56,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150517383] [2023-08-30 05:55:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:55:56,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:56,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:56,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:56,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 05:55:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:55:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:55:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:55:56,903 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-30 05:55:56,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-30 05:55:56,944 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 05:55:56,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 05:55:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:57,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:55:57,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150517383] [2023-08-30 05:55:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150517383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:55:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:55:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:55:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870177690] [2023-08-30 05:55:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:55:57,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:55:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:55:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:55:57,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-30 05:55:57,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:57,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:55:57,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-30 05:55:57,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:55:58,186 INFO L130 PetriNetUnfolder]: 12714/16947 cut-off events. [2023-08-30 05:55:58,187 INFO L131 PetriNetUnfolder]: For 2051/2051 co-relation queries the response was YES. [2023-08-30 05:55:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37689 conditions, 16947 events. 12714/16947 cut-off events. For 2051/2051 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 79071 event pairs, 8937 based on Foata normal form. 0/11349 useless extension candidates. Maximal degree in co-relation 37672. Up to 16947 conditions per place. [2023-08-30 05:55:58,245 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 51 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 05:55:58,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 284 flow [2023-08-30 05:55:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:55:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:55:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-30 05:55:58,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364560639070443 [2023-08-30 05:55:58,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-30 05:55:58,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-30 05:55:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:55:58,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-30 05:55:58,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:58,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:58,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:58,252 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 184 flow. Second operand 3 states and 601 transitions. [2023-08-30 05:55:58,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 284 flow [2023-08-30 05:55:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:55:58,254 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 181 flow [2023-08-30 05:55:58,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-08-30 05:55:58,258 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-30 05:55:58,258 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 181 flow [2023-08-30 05:55:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:55:58,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:55:58,258 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:55:58,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 05:55:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:58,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:55:58,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:55:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash -731937687, now seen corresponding path program 2 times [2023-08-30 05:55:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:55:58,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023909870] [2023-08-30 05:55:58,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:55:58,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:55:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:55:58,469 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:55:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 05:55:58,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:55:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:55:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:55:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:55:58,704 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:55:58,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:55:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:55:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:55:59,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:55:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023909870] [2023-08-30 05:55:59,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023909870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:55:59,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:55:59,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:55:59,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149001845] [2023-08-30 05:55:59,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:55:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:55:59,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:55:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:55:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:56:01,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-30 05:56:01,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:01,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:01,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-30 05:56:01,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:09,021 INFO L130 PetriNetUnfolder]: 42372/56474 cut-off events. [2023-08-30 05:56:09,022 INFO L131 PetriNetUnfolder]: For 6821/6821 co-relation queries the response was YES. [2023-08-30 05:56:09,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125523 conditions, 56474 events. 42372/56474 cut-off events. For 6821/6821 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 300970 event pairs, 29790 based on Foata normal form. 6/37820 useless extension candidates. Maximal degree in co-relation 125505. Up to 11421 conditions per place. [2023-08-30 05:56:09,330 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 432 selfloop transitions, 12 changer transitions 0/444 dead transitions. [2023-08-30 05:56:09,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 444 transitions, 2113 flow [2023-08-30 05:56:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:56:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:56:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2578 transitions. [2023-08-30 05:56:09,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46804647785039943 [2023-08-30 05:56:09,337 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2578 transitions. [2023-08-30 05:56:09,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2578 transitions. [2023-08-30 05:56:09,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:09,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2578 transitions. [2023-08-30 05:56:09,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.83333333333334) internal successors, (2578), 12 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:09,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:09,351 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:09,351 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 181 flow. Second operand 12 states and 2578 transitions. [2023-08-30 05:56:09,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 444 transitions, 2113 flow [2023-08-30 05:56:09,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 444 transitions, 2112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:56:09,358 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 281 flow [2023-08-30 05:56:09,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2023-08-30 05:56:09,359 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 14 predicate places. [2023-08-30 05:56:09,359 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 281 flow [2023-08-30 05:56:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:09,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:09,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:56:09,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:09,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:09,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash -714940251, now seen corresponding path program 1 times [2023-08-30 05:56:09,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183622605] [2023-08-30 05:56:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:09,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:09,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:09,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 05:56:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 05:56:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:09,787 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:56:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:56:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:09,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:09,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183622605] [2023-08-30 05:56:09,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183622605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:09,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:09,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:56:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377680013] [2023-08-30 05:56:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:09,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:56:09,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:56:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:56:10,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-30 05:56:10,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:10,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:10,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-30 05:56:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:14,370 INFO L130 PetriNetUnfolder]: 38488/51408 cut-off events. [2023-08-30 05:56:14,371 INFO L131 PetriNetUnfolder]: For 6316/6316 co-relation queries the response was YES. [2023-08-30 05:56:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114200 conditions, 51408 events. 38488/51408 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 272712 event pairs, 27164 based on Foata normal form. 156/34598 useless extension candidates. Maximal degree in co-relation 114174. Up to 50828 conditions per place. [2023-08-30 05:56:14,601 INFO L137 encePairwiseOnDemand]: 452/459 looper letters, 87 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 05:56:14,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 538 flow [2023-08-30 05:56:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:56:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:56:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-30 05:56:14,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-30 05:56:14,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-30 05:56:14,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-30 05:56:14,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:14,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-30 05:56:14,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:14,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:14,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:14,609 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 281 flow. Second operand 4 states and 796 transitions. [2023-08-30 05:56:14,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 538 flow [2023-08-30 05:56:14,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 90 transitions, 513 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 05:56:14,612 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 285 flow [2023-08-30 05:56:14,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2023-08-30 05:56:14,613 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2023-08-30 05:56:14,613 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 285 flow [2023-08-30 05:56:14,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:14,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:14,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:56:14,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:14,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:14,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -714909148, now seen corresponding path program 1 times [2023-08-30 05:56:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:14,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041421797] [2023-08-30 05:56:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:14,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:14,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 05:56:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:56:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:15,150 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 05:56:15,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 51 [2023-08-30 05:56:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:15,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:15,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:15,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041421797] [2023-08-30 05:56:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041421797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:15,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:15,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052241263] [2023-08-30 05:56:15,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:15,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-08-30 05:56:15,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:15,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:15,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-08-30 05:56:15,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:19,446 INFO L130 PetriNetUnfolder]: 37536/49975 cut-off events. [2023-08-30 05:56:19,446 INFO L131 PetriNetUnfolder]: For 13401/13401 co-relation queries the response was YES. [2023-08-30 05:56:19,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118255 conditions, 49975 events. 37536/49975 cut-off events. For 13401/13401 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 262809 event pairs, 26464 based on Foata normal form. 0/38824 useless extension candidates. Maximal degree in co-relation 118226. Up to 49975 conditions per place. [2023-08-30 05:56:19,673 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 05:56:19,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 397 flow [2023-08-30 05:56:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:56:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:56:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-08-30 05:56:19,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064633260711693 [2023-08-30 05:56:19,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-08-30 05:56:19,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-08-30 05:56:19,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:19,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-08-30 05:56:19,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,679 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 285 flow. Second operand 3 states and 593 transitions. [2023-08-30 05:56:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 397 flow [2023-08-30 05:56:19,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 387 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 05:56:19,683 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 273 flow [2023-08-30 05:56:19,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2023-08-30 05:56:19,684 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-08-30 05:56:19,684 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 273 flow [2023-08-30 05:56:19,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:19,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:19,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:56:19,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:19,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:19,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:19,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:19,896 INFO L85 PathProgramCache]: Analyzing trace with hash -714909146, now seen corresponding path program 1 times [2023-08-30 05:56:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:19,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852003141] [2023-08-30 05:56:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:19,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:19,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 05:56:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:56:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:20,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:56:20,096 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:56:20,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 05:56:20,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 05:56:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:20,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:20,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852003141] [2023-08-30 05:56:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852003141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:20,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:20,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700888300] [2023-08-30 05:56:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:20,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-30 05:56:20,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:20,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:20,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-30 05:56:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:24,118 INFO L130 PetriNetUnfolder]: 36584/48542 cut-off events. [2023-08-30 05:56:24,118 INFO L131 PetriNetUnfolder]: For 13106/13106 co-relation queries the response was YES. [2023-08-30 05:56:24,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115025 conditions, 48542 events. 36584/48542 cut-off events. For 13106/13106 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 252518 event pairs, 25764 based on Foata normal form. 0/38094 useless extension candidates. Maximal degree in co-relation 114996. Up to 48542 conditions per place. [2023-08-30 05:56:24,356 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-30 05:56:24,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 56 transitions, 381 flow [2023-08-30 05:56:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:56:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:56:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 05:56:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-30 05:56:24,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 05:56:24,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 05:56:24,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:24,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 05:56:24,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:24,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:24,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:24,363 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 273 flow. Second operand 3 states and 597 transitions. [2023-08-30 05:56:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 56 transitions, 381 flow [2023-08-30 05:56:24,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:56:24,368 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 270 flow [2023-08-30 05:56:24,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-08-30 05:56:24,368 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-30 05:56:24,368 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 270 flow [2023-08-30 05:56:24,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:24,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:24,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:56:24,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:24,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:24,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:24,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1198231873, now seen corresponding path program 1 times [2023-08-30 05:56:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830507343] [2023-08-30 05:56:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:24,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:24,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:24,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:24,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 05:56:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:56:24,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:24,816 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:56:24,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:56:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:24,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:56:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:25,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830507343] [2023-08-30 05:56:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830507343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:56:25,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:56:25,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:56:25,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822894127] [2023-08-30 05:56:25,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:56:25,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:56:25,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:25,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:56:25,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:56:28,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-08-30 05:56:28,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:28,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:28,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-08-30 05:56:28,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:32,623 INFO L130 PetriNetUnfolder]: 33254/44226 cut-off events. [2023-08-30 05:56:32,623 INFO L131 PetriNetUnfolder]: For 12598/12598 co-relation queries the response was YES. [2023-08-30 05:56:32,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104570 conditions, 44226 events. 33254/44226 cut-off events. For 12598/12598 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 229071 event pairs, 23504 based on Foata normal form. 234/34986 useless extension candidates. Maximal degree in co-relation 104540. Up to 42684 conditions per place. [2023-08-30 05:56:32,809 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 107 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2023-08-30 05:56:32,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 639 flow [2023-08-30 05:56:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:56:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:56:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2023-08-30 05:56:32,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41083099906629317 [2023-08-30 05:56:32,813 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2023-08-30 05:56:32,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2023-08-30 05:56:32,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:32,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2023-08-30 05:56:32,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:32,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:32,820 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:32,820 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 270 flow. Second operand 7 states and 1320 transitions. [2023-08-30 05:56:32,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 639 flow [2023-08-30 05:56:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:56:32,825 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 302 flow [2023-08-30 05:56:32,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2023-08-30 05:56:32,826 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2023-08-30 05:56:32,826 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 302 flow [2023-08-30 05:56:32,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:32,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:32,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 05:56:32,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:33,035 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:33,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 999597029, now seen corresponding path program 2 times [2023-08-30 05:56:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185797071] [2023-08-30 05:56:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:56:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:33,037 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:33,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 05:56:33,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:56:33,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:56:33,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 05:56:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:33,276 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-30 05:56:33,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-30 05:56:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:33,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:56:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:33,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:33,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185797071] [2023-08-30 05:56:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185797071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:56:33,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:56:33,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:56:33,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329584466] [2023-08-30 05:56:33,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:56:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:56:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:56:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:56:36,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 459 [2023-08-30 05:56:36,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 302 flow. Second operand has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:36,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:36,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 459 [2023-08-30 05:56:36,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:56:48,559 INFO L130 PetriNetUnfolder]: 76358/101354 cut-off events. [2023-08-30 05:56:48,559 INFO L131 PetriNetUnfolder]: For 22972/22972 co-relation queries the response was YES. [2023-08-30 05:56:48,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235629 conditions, 101354 events. 76358/101354 cut-off events. For 22972/22972 co-relation queries the response was YES. Maximal size of possible extension queue 2237. Compared 593349 event pairs, 6224 based on Foata normal form. 8/84240 useless extension candidates. Maximal degree in co-relation 235596. Up to 35331 conditions per place. [2023-08-30 05:56:49,371 INFO L137 encePairwiseOnDemand]: 451/459 looper letters, 220 selfloop transitions, 19 changer transitions 1/240 dead transitions. [2023-08-30 05:56:49,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 240 transitions, 1224 flow [2023-08-30 05:56:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 05:56:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 05:56:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2161 transitions. [2023-08-30 05:56:49,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42800554565260446 [2023-08-30 05:56:49,376 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2161 transitions. [2023-08-30 05:56:49,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2161 transitions. [2023-08-30 05:56:49,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:56:49,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2161 transitions. [2023-08-30 05:56:49,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.45454545454547) internal successors, (2161), 11 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:49,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:49,386 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:49,386 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 302 flow. Second operand 11 states and 2161 transitions. [2023-08-30 05:56:49,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 240 transitions, 1224 flow [2023-08-30 05:56:49,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 240 transitions, 1207 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 05:56:49,399 INFO L231 Difference]: Finished difference. Result has 97 places, 65 transitions, 402 flow [2023-08-30 05:56:49,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=402, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2023-08-30 05:56:49,400 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-08-30 05:56:49,400 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 402 flow [2023-08-30 05:56:49,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:49,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:49,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:56:49,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 05:56:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:49,611 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:56:49,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 167104997, now seen corresponding path program 1 times [2023-08-30 05:56:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149475859] [2023-08-30 05:56:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:49,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:56:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:49,613 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:56:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 05:56:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:56:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:49,837 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-30 05:56:49,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-30 05:56:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:56:49,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:49,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:49,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149475859] [2023-08-30 05:56:49,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149475859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:49,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:49,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:56:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427178321] [2023-08-30 05:56:49,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:49,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:56:49,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:56:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:56:50,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-08-30 05:56:50,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:56:50,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:50,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-08-30 05:56:50,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:02,267 INFO L130 PetriNetUnfolder]: 99380/131928 cut-off events. [2023-08-30 05:57:02,268 INFO L131 PetriNetUnfolder]: For 157148/157148 co-relation queries the response was YES. [2023-08-30 05:57:02,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354198 conditions, 131928 events. 99380/131928 cut-off events. For 157148/157148 co-relation queries the response was YES. Maximal size of possible extension queue 2823. Compared 793207 event pairs, 17618 based on Foata normal form. 0/116740 useless extension candidates. Maximal degree in co-relation 354160. Up to 104035 conditions per place. [2023-08-30 05:57:03,142 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 93 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-08-30 05:57:03,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 783 flow [2023-08-30 05:57:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:57:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:57:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 785 transitions. [2023-08-30 05:57:03,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275599128540305 [2023-08-30 05:57:03,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 785 transitions. [2023-08-30 05:57:03,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 785 transitions. [2023-08-30 05:57:03,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:03,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 785 transitions. [2023-08-30 05:57:03,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:03,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:03,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:03,148 INFO L175 Difference]: Start difference. First operand has 97 places, 65 transitions, 402 flow. Second operand 4 states and 785 transitions. [2023-08-30 05:57:03,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 783 flow [2023-08-30 05:57:03,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 723 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-30 05:57:03,330 INFO L231 Difference]: Finished difference. Result has 94 places, 67 transitions, 402 flow [2023-08-30 05:57:03,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=94, PETRI_TRANSITIONS=67} [2023-08-30 05:57:03,331 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2023-08-30 05:57:03,331 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 67 transitions, 402 flow [2023-08-30 05:57:03,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:03,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:03,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:57:03,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-30 05:57:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:03,532 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:57:03,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 167105029, now seen corresponding path program 1 times [2023-08-30 05:57:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616174595] [2023-08-30 05:57:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:03,534 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:57:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 05:57:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:57:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:03,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:03,732 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:57:03,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-30 05:57:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-08-30 05:57:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:57:03,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:03,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:03,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616174595] [2023-08-30 05:57:03,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616174595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:03,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:03,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183120157] [2023-08-30 05:57:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:03,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:03,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:03,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-08-30 05:57:03,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 67 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:03,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:03,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-08-30 05:57:03,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:15,595 INFO L130 PetriNetUnfolder]: 92449/122509 cut-off events. [2023-08-30 05:57:15,595 INFO L131 PetriNetUnfolder]: For 119702/119702 co-relation queries the response was YES. [2023-08-30 05:57:16,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347401 conditions, 122509 events. 92449/122509 cut-off events. For 119702/119702 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 710003 event pairs, 65557 based on Foata normal form. 0/120021 useless extension candidates. Maximal degree in co-relation 347365. Up to 122509 conditions per place. [2023-08-30 05:57:16,459 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 05:57:16,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 65 transitions, 528 flow [2023-08-30 05:57:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-30 05:57:16,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-08-30 05:57:16,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-30 05:57:16,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-30 05:57:16,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:16,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-30 05:57:16,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:16,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:16,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:16,464 INFO L175 Difference]: Start difference. First operand has 94 places, 67 transitions, 402 flow. Second operand 3 states and 595 transitions. [2023-08-30 05:57:16,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 65 transitions, 528 flow [2023-08-30 05:57:16,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 65 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:57:16,689 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 390 flow [2023-08-30 05:57:16,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=390, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2023-08-30 05:57:16,690 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 26 predicate places. [2023-08-30 05:57:16,690 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 390 flow [2023-08-30 05:57:16,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:16,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:16,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:57:16,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 05:57:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:16,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:57:16,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 167105028, now seen corresponding path program 1 times [2023-08-30 05:57:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974585389] [2023-08-30 05:57:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:16,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:16,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:57:16,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 05:57:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:57:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:17,133 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 05:57:17,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2023-08-30 05:57:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:57:17,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:17,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974585389] [2023-08-30 05:57:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974585389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102607589] [2023-08-30 05:57:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:17,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 459 [2023-08-30 05:57:17,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:17,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:17,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 459 [2023-08-30 05:57:17,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:27,953 INFO L130 PetriNetUnfolder]: 85518/113090 cut-off events. [2023-08-30 05:57:27,953 INFO L131 PetriNetUnfolder]: For 108690/108690 co-relation queries the response was YES. [2023-08-30 05:57:28,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316179 conditions, 113090 events. 85518/113090 cut-off events. For 108690/108690 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 648387 event pairs, 60184 based on Foata normal form. 0/113090 useless extension candidates. Maximal degree in co-relation 316143. Up to 113090 conditions per place. [2023-08-30 05:57:28,822 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-30 05:57:28,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 63 transitions, 512 flow [2023-08-30 05:57:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 05:57:28,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-30 05:57:28,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 05:57:28,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 05:57:28,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:28,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 05:57:28,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:28,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:28,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:28,827 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 390 flow. Second operand 3 states and 578 transitions. [2023-08-30 05:57:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 63 transitions, 512 flow [2023-08-30 05:57:29,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 63 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:29,080 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 387 flow [2023-08-30 05:57:29,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2023-08-30 05:57:29,081 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2023-08-30 05:57:29,081 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 387 flow [2023-08-30 05:57:29,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:29,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:29,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:57:29,090 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 (19)] Forceful destruction successful, exit code 0 [2023-08-30 05:57:29,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:29,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:57:29,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 418533457, now seen corresponding path program 1 times [2023-08-30 05:57:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425568785] [2023-08-30 05:57:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:29,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:29,287 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:57:29,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 05:57:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:57:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:29,520 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 05:57:29,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 05:57:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:57:29,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:57:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:57:30,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425568785] [2023-08-30 05:57:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425568785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:57:30,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:57:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:57:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085247723] [2023-08-30 05:57:30,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:57:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:57:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:57:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:57:31,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-08-30 05:57:31,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 387 flow. Second operand has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:31,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:31,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-08-30 05:57:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:43,208 INFO L130 PetriNetUnfolder]: 84836/112142 cut-off events. [2023-08-30 05:57:43,208 INFO L131 PetriNetUnfolder]: For 116657/116657 co-relation queries the response was YES. [2023-08-30 05:57:43,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313767 conditions, 112142 events. 84836/112142 cut-off events. For 116657/116657 co-relation queries the response was YES. Maximal size of possible extension queue 2491. Compared 633434 event pairs, 59682 based on Foata normal form. 66/112208 useless extension candidates. Maximal degree in co-relation 313730. Up to 111724 conditions per place. [2023-08-30 05:57:43,991 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 97 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-08-30 05:57:43,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 103 transitions, 701 flow [2023-08-30 05:57:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:57:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:57:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1300 transitions. [2023-08-30 05:57:43,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046062869592281 [2023-08-30 05:57:43,994 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1300 transitions. [2023-08-30 05:57:43,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1300 transitions. [2023-08-30 05:57:43,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:43,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1300 transitions. [2023-08-30 05:57:43,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:43,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:43,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:43,999 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 387 flow. Second operand 7 states and 1300 transitions. [2023-08-30 05:57:43,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 103 transitions, 701 flow [2023-08-30 05:57:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:44,127 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 403 flow [2023-08-30 05:57:44,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-08-30 05:57:44,127 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-08-30 05:57:44,128 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 403 flow [2023-08-30 05:57:44,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:44,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:44,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:57:44,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 05:57:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:44,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-30 05:57:44,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash 149389943, now seen corresponding path program 2 times [2023-08-30 05:57:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:44,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089055100] [2023-08-30 05:57:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:57:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:57:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:44,330 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:57:44,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 05:57:44,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:57:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:57:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 05:57:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:44,629 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-08-30 05:57:44,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2023-08-30 05:57:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:57:44,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:57:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:57:45,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089055100] [2023-08-30 05:57:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089055100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:57:45,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:57:45,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:57:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187096196] [2023-08-30 05:57:45,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:57:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:57:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:57:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:57:46,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-08-30 05:57:46,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 403 flow. Second operand has 8 states, 8 states have (on average 180.75) internal successors, (1446), 8 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:46,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:46,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-08-30 05:57:46,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand