./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.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-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --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 05:41:32,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:41:32,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:41:32,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:41:32,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:41:32,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:41:32,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:41:32,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:41:32,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:41:32,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:41:32,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:41:32,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:41:32,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:41:32,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:41:32,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:41:32,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:41:32,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:41:32,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:41:32,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:41:32,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:41:32,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:41:32,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:41:32,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:41:32,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:41:32,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:41:32,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:41:32,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:41:32,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:41:32,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:41:32,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:41:32,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:41:32,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:41:32,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:41:32,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:41:32,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:41:32,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:41:32,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:41:32,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:41:32,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:41:32,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:41:32,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:41:32,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:41:32,861 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:41:32,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:41:32,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:41:32,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:41:32,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:41:32,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:41:32,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:41:32,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:41:32,865 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:41:32,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:41:32,866 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:41:32,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:41:32,867 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:41:32,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:41:32,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:41:32,867 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:41:32,868 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:41:32,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:41:32,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:41:32,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:41:32,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:32,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:41:32,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:41:32,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:41:32,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:41:32,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:41:32,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:41:32,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:41:32,870 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:41:32,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:41:33,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:41:33,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:41:33,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:41:33,176 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:41:33,176 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:41:33,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 05:41:34,312 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:41:34,542 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:41:34,542 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 05:41:34,550 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56e7ca8c/32dec9d30f46469b8ed49f5cca7af1a4/FLAG2bbc057cb [2023-08-30 05:41:34,573 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56e7ca8c/32dec9d30f46469b8ed49f5cca7af1a4 [2023-08-30 05:41:34,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:41:34,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:41:34,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:34,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:41:34,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:41:34,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:34" (1/1) ... [2023-08-30 05:41:34,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcbc5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:34, skipping insertion in model container [2023-08-30 05:41:34,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:34" (1/1) ... [2023-08-30 05:41:34,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:41:34,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:34,769 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-lamport.wvr.c[4210,4223] [2023-08-30 05:41:34,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:34,789 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 05:41:34,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a649e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:34, skipping insertion in model container [2023-08-30 05:41:34,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:34,790 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:41:34,792 INFO L158 Benchmark]: Toolchain (without parser) took 214.23ms. Allocated memory is still 83.9MB. Free memory was 61.5MB in the beginning and 51.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:41:34,792 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.3MB in the beginning and 40.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:41:34,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.85ms. Allocated memory is still 83.9MB. Free memory was 61.3MB in the beginning and 51.0MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 05:41:34,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.3MB in the beginning and 40.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.85ms. Allocated memory is still 83.9MB. Free memory was 61.3MB in the beginning and 51.0MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 170]: 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-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --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 05:41:36,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:41:36,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:41:36,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:41:36,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:41:36,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:41:36,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:41:36,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:41:36,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:41:36,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:41:36,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:41:36,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:41:36,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:41:36,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:41:36,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:41:36,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:41:36,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:41:36,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:41:36,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:41:36,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:41:36,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:41:36,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:41:36,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:41:36,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:41:36,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:41:36,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:41:36,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:41:36,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:41:36,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:41:36,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:41:36,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:41:36,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:41:36,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:41:36,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:41:36,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:41:36,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:41:36,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:41:36,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:41:36,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:41:36,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:41:36,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:41:36,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:41:36,575 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:41:36,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:41:36,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:41:36,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:41:36,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:41:36,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:41:36,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:41:36,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:41:36,577 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:41:36,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:41:36,578 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:41:36,578 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:41:36,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:41:36,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:41:36,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:41:36,580 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:41:36,580 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:41:36,580 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:41:36,580 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:41:36,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:41:36,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:41:36,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:41:36,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:36,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:41:36,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:41:36,582 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:41:36,582 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:41:36,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:41:36,582 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:41:36,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:41:36,583 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:41:36,583 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:41:36,583 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:41:36,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:41:36,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:41:36,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:41:36,907 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:41:36,907 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:41:36,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 05:41:37,958 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:41:38,175 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:41:38,175 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-30 05:41:38,181 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/831cd5f97/2f87d2a9d7e2456fb28a224389416c3f/FLAGebd7979d1 [2023-08-30 05:41:38,193 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/831cd5f97/2f87d2a9d7e2456fb28a224389416c3f [2023-08-30 05:41:38,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:41:38,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:41:38,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:38,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:41:38,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:41:38,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd46325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38, skipping insertion in model container [2023-08-30 05:41:38,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:41:38,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:38,387 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-lamport.wvr.c[4210,4223] [2023-08-30 05:41:38,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:38,409 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:41:38,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:38,443 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-lamport.wvr.c[4210,4223] [2023-08-30 05:41:38,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:38,463 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:41:38,497 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-lamport.wvr.c[4210,4223] [2023-08-30 05:41:38,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:38,515 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:38,518 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:38,524 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:41:38,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38 WrapperNode [2023-08-30 05:41:38,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:38,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:38,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:41:38,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:41:38,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,582 INFO L138 Inliner]: procedures = 27, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 235 [2023-08-30 05:41:38,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:38,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:41:38,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:41:38,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:41:38,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:41:38,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:41:38,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:41:38,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:41:38,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (1/1) ... [2023-08-30 05:41:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:41:38,720 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 05:41:38,745 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 05:41:38,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:41:38,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:41:38,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:41:38,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:41:38,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:41:38,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:41:38,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:41:38,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:41:38,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:41:38,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:41:38,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:41:38,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:41:38,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:41:38,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:41:38,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:41:38,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:41:38,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:41:38,772 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 05:41:38,924 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:41:38,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:41:39,390 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:41:39,508 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:41:39,517 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 05:41:39,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:39 BoogieIcfgContainer [2023-08-30 05:41:39,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:41:39,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:41:39,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:41:39,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:41:39,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:41:38" (1/3) ... [2023-08-30 05:41:39,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d52282e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:39, skipping insertion in model container [2023-08-30 05:41:39,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:38" (2/3) ... [2023-08-30 05:41:39,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d52282e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:39, skipping insertion in model container [2023-08-30 05:41:39,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:39" (3/3) ... [2023-08-30 05:41:39,528 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-08-30 05:41:39,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:41:39,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-08-30 05:41:39,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:41:39,642 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 05:41:39,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 198 transitions, 420 flow [2023-08-30 05:41:39,776 INFO L130 PetriNetUnfolder]: 7/195 cut-off events. [2023-08-30 05:41:39,776 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:41:39,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 7/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 05:41:39,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 198 transitions, 420 flow [2023-08-30 05:41:39,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 191 transitions, 400 flow [2023-08-30 05:41:39,795 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:41:39,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 191 transitions, 400 flow [2023-08-30 05:41:39,816 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 191 transitions, 400 flow [2023-08-30 05:41:39,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 191 transitions, 400 flow [2023-08-30 05:41:39,861 INFO L130 PetriNetUnfolder]: 7/191 cut-off events. [2023-08-30 05:41:39,861 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:41:39,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 7/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-30 05:41:39,864 INFO L119 LiptonReduction]: Number of co-enabled transitions 2258 [2023-08-30 05:41:54,719 INFO L134 LiptonReduction]: Checked pairs total: 14821 [2023-08-30 05:41:54,720 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-30 05:41:54,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:41:54,736 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;@16311bba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:41:54,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-08-30 05:41:54,739 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:41:54,739 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:41:54,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:54,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:41:54,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:41:54,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 25599, now seen corresponding path program 1 times [2023-08-30 05:41:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:41:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593467436] [2023-08-30 05:41:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:54,755 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 05:41:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:41:54,761 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 05:41:54,764 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 05:41:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:41:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:41:55,011 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:41:55,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:41:55,051 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 05:41:55,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:41:55,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:41:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593467436] [2023-08-30 05:41:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593467436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:55,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:55,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995954913] [2023-08-30 05:41:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:55,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:41:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:55,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-30 05:41:55,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:41:55,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:55,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-30 05:41:55,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:56,509 INFO L130 PetriNetUnfolder]: 4595/7242 cut-off events. [2023-08-30 05:41:56,510 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2023-08-30 05:41:56,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14533 conditions, 7242 events. 4595/7242 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45579 event pairs, 4594 based on Foata normal form. 0/4854 useless extension candidates. Maximal degree in co-relation 6688. Up to 3471 conditions per place. [2023-08-30 05:41:56,564 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 86 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-30 05:41:56,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 412 flow [2023-08-30 05:41:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-30 05:41:56,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2023-08-30 05:41:56,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-30 05:41:56,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-30 05:41:56,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:56,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-30 05:41:56,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 05:41:56,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:56,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:56,595 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 136 flow. Second operand 3 states and 594 transitions. [2023-08-30 05:41:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 412 flow [2023-08-30 05:41:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 388 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:41:56,604 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 132 flow [2023-08-30 05:41:56,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 05:41:56,609 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-30 05:41:56,609 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 132 flow [2023-08-30 05:41:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:41:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:56,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:41:56,623 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 05:41:56,821 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 05:41:56,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:41:56,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 25664, now seen corresponding path program 1 times [2023-08-30 05:41:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:41:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419229196] [2023-08-30 05:41:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:56,823 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 05:41:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:41:56,824 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 05:41:56,827 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 (3)] Waiting until timeout for monitored process [2023-08-30 05:41:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:41:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:41:56,942 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 05:41:56,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:41:56,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:41:56,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419229196] [2023-08-30 05:41:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419229196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:56,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:56,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:56,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949475764] [2023-08-30 05:41:56,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:56,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:41:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:56,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 375 [2023-08-30 05:41:56,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 05:41:56,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:56,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 375 [2023-08-30 05:41:56,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:57,591 INFO L130 PetriNetUnfolder]: 2298/3624 cut-off events. [2023-08-30 05:41:57,592 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:41:57,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7178 conditions, 3624 events. 2298/3624 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20241 event pairs, 2297 based on Foata normal form. 0/2430 useless extension candidates. Maximal degree in co-relation 7165. Up to 3471 conditions per place. [2023-08-30 05:41:57,612 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 05:41:57,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 228 flow [2023-08-30 05:41:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-30 05:41:57,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951111111111111 [2023-08-30 05:41:57,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-30 05:41:57,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-30 05:41:57,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:57,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-30 05:41:57,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:41:57,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:57,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:57,621 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 132 flow. Second operand 3 states and 557 transitions. [2023-08-30 05:41:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 228 flow [2023-08-30 05:41:57,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:41:57,623 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 142 flow [2023-08-30 05:41:57,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-30 05:41:57,624 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-30 05:41:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 142 flow [2023-08-30 05:41:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 05:41:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:41:57,640 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 05:41:57,834 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 05:41:57,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:41:57,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 25598, now seen corresponding path program 1 times [2023-08-30 05:41:57,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:41:57,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511167294] [2023-08-30 05:41:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:57,836 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 05:41:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:41:57,837 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 05:41:57,839 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 05:41:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:41:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:41:57,956 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:41:57,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:41:57,982 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 05:41:57,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:41:57,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:41:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511167294] [2023-08-30 05:41:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511167294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:57,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854512172] [2023-08-30 05:41:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:57,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:57,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:41:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:58,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-30 05:41:58,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:41:58,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:58,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-30 05:41:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:58,530 INFO L130 PetriNetUnfolder]: 2298/3622 cut-off events. [2023-08-30 05:41:58,531 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:41:58,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 3622 events. 2298/3622 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20193 event pairs, 2297 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 7166. Up to 3470 conditions per place. [2023-08-30 05:41:58,554 INFO L137 encePairwiseOnDemand]: 373/375 looper letters, 44 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 05:41:58,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 230 flow [2023-08-30 05:41:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-30 05:41:58,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48533333333333334 [2023-08-30 05:41:58,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-30 05:41:58,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-30 05:41:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:58,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-30 05:41:58,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 05:41:58,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:58,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:41:58,563 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 142 flow. Second operand 3 states and 546 transitions. [2023-08-30 05:41:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 230 flow [2023-08-30 05:41:58,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 224 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:58,565 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 136 flow [2023-08-30 05:41:58,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 05:41:58,566 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2023-08-30 05:41:58,566 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 136 flow [2023-08-30 05:41:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 05:41:58,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:58,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:41:58,577 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 05:41:58,776 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 05:41:58,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:41:58,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 795236, now seen corresponding path program 1 times [2023-08-30 05:41:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:41:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491316754] [2023-08-30 05:41:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:58,778 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 05:41:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:41:58,779 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 05:41:58,782 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 05:41:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:41:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:41:58,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:41:58,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:41:59,036 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 05:41:59,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:41:59,235 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 05:41:59,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:41:59,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491316754] [2023-08-30 05:41:59,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491316754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:41:59,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:41:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:41:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625095377] [2023-08-30 05:41:59,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:41:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:41:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:41:59,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:41:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:00,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 375 [2023-08-30 05:42:00,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 05:42:00,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:00,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 375 [2023-08-30 05:42:00,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:01,119 INFO L130 PetriNetUnfolder]: 4601/7249 cut-off events. [2023-08-30 05:42:01,119 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:42:01,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14365 conditions, 7249 events. 4601/7249 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45602 event pairs, 4594 based on Foata normal form. 0/4861 useless extension candidates. Maximal degree in co-relation 14356. Up to 3473 conditions per place. [2023-08-30 05:42:01,159 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 84 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-08-30 05:42:01,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 456 flow [2023-08-30 05:42:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2023-08-30 05:42:01,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2023-08-30 05:42:01,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2023-08-30 05:42:01,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2023-08-30 05:42:01,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:01,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2023-08-30 05:42:01,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states 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 05:42:01,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 05:42:01,172 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 05:42:01,172 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 136 flow. Second operand 6 states and 1070 transitions. [2023-08-30 05:42:01,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 456 flow [2023-08-30 05:42:01,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:01,175 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 233 flow [2023-08-30 05:42:01,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2023-08-30 05:42:01,176 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-30 05:42:01,176 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 233 flow [2023-08-30 05:42:01,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 05:42:01,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:01,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:01,191 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 05:42:01,386 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 05:42:01,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:01,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 795301, now seen corresponding path program 1 times [2023-08-30 05:42:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380494395] [2023-08-30 05:42:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:01,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:42:01,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:01,388 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 05:42:01,391 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 05:42:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:42:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:01,568 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-08-30 05:42:01,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2023-08-30 05:42:01,592 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 05:42:01,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 05:42:01,694 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 05:42:01,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:01,800 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 05:42:01,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:01,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380494395] [2023-08-30 05:42:01,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380494395] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:42:01,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:42:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-30 05:42:01,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879179424] [2023-08-30 05:42:01,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:01,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:42:01,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:42:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:02,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2023-08-30 05:42:02,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 05:42:02,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:02,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2023-08-30 05:42:02,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:02,724 INFO L130 PetriNetUnfolder]: 3671/5885 cut-off events. [2023-08-30 05:42:02,724 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 05:42:02,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 5885 events. 3671/5885 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36598 event pairs, 3666 based on Foata normal form. 0/4113 useless extension candidates. Maximal degree in co-relation 11699. Up to 5629 conditions per place. [2023-08-30 05:42:02,753 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 49 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 05:42:02,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 307 flow [2023-08-30 05:42:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-30 05:42:02,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631111111111111 [2023-08-30 05:42:02,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-30 05:42:02,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-30 05:42:02,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:02,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-30 05:42:02,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 05:42:02,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:02,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:02,762 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 233 flow. Second operand 3 states and 521 transitions. [2023-08-30 05:42:02,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 307 flow [2023-08-30 05:42:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 289 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:02,767 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 191 flow [2023-08-30 05:42:02,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-08-30 05:42:02,768 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-30 05:42:02,768 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 191 flow [2023-08-30 05:42:02,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 05:42:02,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:02,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:42:02,776 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 05:42:02,970 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 05:42:02,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:02,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 795300, now seen corresponding path program 1 times [2023-08-30 05:42:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039529554] [2023-08-30 05:42:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:02,973 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 05:42:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:02,974 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 05:42:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 05:42:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:42:03,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:03,114 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 05:42:03,115 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 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 05:42:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:03,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:03,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039529554] [2023-08-30 05:42:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039529554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:03,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:03,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389266551] [2023-08-30 05:42:03,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:03,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:03,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:03,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:03,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-30 05:42:03,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 05:42:03,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:03,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-30 05:42:03,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:03,869 INFO L130 PetriNetUnfolder]: 2741/4521 cut-off events. [2023-08-30 05:42:03,870 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 05:42:03,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9016 conditions, 4521 events. 2741/4521 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27723 event pairs, 2738 based on Foata normal form. 0/3365 useless extension candidates. Maximal degree in co-relation 9001. Up to 4313 conditions per place. [2023-08-30 05:42:03,894 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 45 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 05:42:03,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 58 transitions, 261 flow [2023-08-30 05:42:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-30 05:42:03,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826666666666667 [2023-08-30 05:42:03,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-30 05:42:03,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-30 05:42:03,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:03,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-30 05:42:03,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:03,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:03,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:03,902 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 191 flow. Second operand 3 states and 543 transitions. [2023-08-30 05:42:03,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 58 transitions, 261 flow [2023-08-30 05:42:03,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:03,905 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 170 flow [2023-08-30 05:42:03,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=170, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-08-30 05:42:03,905 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-30 05:42:03,906 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 170 flow [2023-08-30 05:42:03,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 05:42:03,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:03,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:03,918 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 05:42:04,118 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 05:42:04,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:04,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 764301307, now seen corresponding path program 1 times [2023-08-30 05:42:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:04,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102968975] [2023-08-30 05:42:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:04,119 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 05:42:04,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:04,120 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 05:42:04,121 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 05:42:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:42:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:42:04,310 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-30 05:42:04,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-30 05:42:04,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 05:42:04,517 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 05:42:04,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:04,670 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 05:42:04,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102968975] [2023-08-30 05:42:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102968975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:04,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:04,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014785354] [2023-08-30 05:42:04,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:05,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-30 05:42:05,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 05:42:05,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:05,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-30 05:42:05,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:06,132 INFO L130 PetriNetUnfolder]: 2653/4367 cut-off events. [2023-08-30 05:42:06,132 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 05:42:06,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8711 conditions, 4367 events. 2653/4367 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26631 event pairs, 2650 based on Foata normal form. 0/3302 useless extension candidates. Maximal degree in co-relation 8695. Up to 2083 conditions per place. [2023-08-30 05:42:06,153 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 76 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-30 05:42:06,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 406 flow [2023-08-30 05:42:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-08-30 05:42:06,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634666666666667 [2023-08-30 05:42:06,157 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-08-30 05:42:06,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-08-30 05:42:06,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:06,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-08-30 05:42:06,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:06,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:42:06,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:42:06,162 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 170 flow. Second operand 5 states and 869 transitions. [2023-08-30 05:42:06,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 406 flow [2023-08-30 05:42:06,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:06,164 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 171 flow [2023-08-30 05:42:06,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-08-30 05:42:06,165 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-30 05:42:06,165 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 171 flow [2023-08-30 05:42:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 05:42:06,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:06,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:42:06,176 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 05:42:06,376 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 05:42:06,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:06,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 764301306, now seen corresponding path program 1 times [2023-08-30 05:42:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:06,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310678604] [2023-08-30 05:42:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:06,377 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 05:42:06,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:06,378 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 05:42:06,380 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 05:42:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:42:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:06,504 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 05:42:06,505 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 05:42:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:06,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:06,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310678604] [2023-08-30 05:42:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310678604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:06,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:06,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:06,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005061919] [2023-08-30 05:42:06,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:06,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:06,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-30 05:42:06,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 05:42:06,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:06,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-30 05:42:06,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:07,178 INFO L130 PetriNetUnfolder]: 2565/4213 cut-off events. [2023-08-30 05:42:07,178 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 05:42:07,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8408 conditions, 4213 events. 2565/4213 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25679 event pairs, 2562 based on Foata normal form. 0/3237 useless extension candidates. Maximal degree in co-relation 8391. Up to 4009 conditions per place. [2023-08-30 05:42:07,194 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 41 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 05:42:07,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 54 transitions, 251 flow [2023-08-30 05:42:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 05:42:07,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791111111111111 [2023-08-30 05:42:07,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 05:42:07,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 05:42:07,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:07,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 05:42:07,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:07,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:07,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:07,201 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 171 flow. Second operand 3 states and 539 transitions. [2023-08-30 05:42:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 54 transitions, 251 flow [2023-08-30 05:42:07,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:07,203 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 164 flow [2023-08-30 05:42:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=164, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2023-08-30 05:42:07,204 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-30 05:42:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 164 flow [2023-08-30 05:42:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 05:42:07,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:07,204 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:42:07,216 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 05:42:07,414 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 05:42:07,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:07,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2077272769, now seen corresponding path program 2 times [2023-08-30 05:42:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669913967] [2023-08-30 05:42:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:07,416 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 05:42:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:07,417 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 05:42:07,420 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 05:42:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:42:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:07,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:42:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:07,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:07,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:07,709 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 05:42:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:08,205 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 05:42:08,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669913967] [2023-08-30 05:42:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669913967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:08,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:08,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:42:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138168170] [2023-08-30 05:42:08,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:42:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:42:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:42:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-30 05:42:11,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 164 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 05:42:11,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:11,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-30 05:42:11,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:15,614 INFO L130 PetriNetUnfolder]: 11531/18932 cut-off events. [2023-08-30 05:42:15,614 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-30 05:42:15,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37666 conditions, 18932 events. 11531/18932 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 144722 event pairs, 11529 based on Foata normal form. 6/14554 useless extension candidates. Maximal degree in co-relation 37649. Up to 2002 conditions per place. [2023-08-30 05:42:15,700 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 299 selfloop transitions, 12 changer transitions 0/323 dead transitions. [2023-08-30 05:42:15,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 323 transitions, 1426 flow [2023-08-30 05:42:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 05:42:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 05:42:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2273 transitions. [2023-08-30 05:42:15,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051111111111111 [2023-08-30 05:42:15,708 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2273 transitions. [2023-08-30 05:42:15,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2273 transitions. [2023-08-30 05:42:15,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:15,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2273 transitions. [2023-08-30 05:42:15,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.41666666666666) internal successors, (2273), 12 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states 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 05:42:15,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 05:42:15,722 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 05:42:15,722 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 164 flow. Second operand 12 states and 2273 transitions. [2023-08-30 05:42:15,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 323 transitions, 1426 flow [2023-08-30 05:42:15,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 323 transitions, 1425 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:15,727 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 261 flow [2023-08-30 05:42:15,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=261, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-08-30 05:42:15,728 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-30 05:42:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 261 flow [2023-08-30 05:42:15,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 05:42:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:15,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:15,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-08-30 05:42:15,938 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 05:42:15,939 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:15,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 54165560, now seen corresponding path program 1 times [2023-08-30 05:42:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43845470] [2023-08-30 05:42:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:15,940 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 05:42:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:15,941 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 05:42:15,944 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 05:42:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:42:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:16,088 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 05:42:16,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 05:42:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:16,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:16,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:16,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43845470] [2023-08-30 05:42:16,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43845470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:16,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:16,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:42:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461029945] [2023-08-30 05:42:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:42:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:42:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:42:16,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 375 [2023-08-30 05:42:16,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 05:42:16,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:16,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 375 [2023-08-30 05:42:16,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:17,488 INFO L130 PetriNetUnfolder]: 10505/17231 cut-off events. [2023-08-30 05:42:17,488 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 05:42:17,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 17231 events. 10505/17231 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 130342 event pairs, 10503 based on Foata normal form. 0/13649 useless extension candidates. Maximal degree in co-relation 34350. Up to 16385 conditions per place. [2023-08-30 05:42:17,555 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 46 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 05:42:17,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 59 transitions, 351 flow [2023-08-30 05:42:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:42:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:42:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 05:42:17,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693333333333333 [2023-08-30 05:42:17,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 05:42:17,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 05:42:17,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:17,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 05:42:17,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:17,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:17,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:42:17,561 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 261 flow. Second operand 3 states and 528 transitions. [2023-08-30 05:42:17,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 59 transitions, 351 flow [2023-08-30 05:42:17,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 59 transitions, 326 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 05:42:17,564 INFO L231 Difference]: Finished difference. Result has 81 places, 59 transitions, 234 flow [2023-08-30 05:42:17,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=81, PETRI_TRANSITIONS=59} [2023-08-30 05:42:17,565 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2023-08-30 05:42:17,565 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 59 transitions, 234 flow [2023-08-30 05:42:17,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 05:42:17,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:17,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:17,574 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 05:42:17,768 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 05:42:17,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:17,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash 54165561, now seen corresponding path program 1 times [2023-08-30 05:42:17,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:17,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148253107] [2023-08-30 05:42:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:17,770 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 05:42:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:17,771 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 05:42:17,774 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 05:42:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:42:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:17,965 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:17,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:18,138 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 05:42:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:18,298 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 05:42:18,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:18,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148253107] [2023-08-30 05:42:18,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148253107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:18,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549977801] [2023-08-30 05:42:18,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:19,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-30 05:42:19,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 59 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 05:42:19,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:19,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-30 05:42:19,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:20,707 INFO L130 PetriNetUnfolder]: 9479/15530 cut-off events. [2023-08-30 05:42:20,707 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-30 05:42:20,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31028 conditions, 15530 events. 9479/15530 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 115673 event pairs, 9477 based on Foata normal form. 0/12766 useless extension candidates. Maximal degree in co-relation 31002. Up to 13116 conditions per place. [2023-08-30 05:42:20,813 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 71 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-30 05:42:20,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 448 flow [2023-08-30 05:42:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-08-30 05:42:20,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570666666666667 [2023-08-30 05:42:20,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-08-30 05:42:20,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-08-30 05:42:20,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:20,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-08-30 05:42:20,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states 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 05:42:20,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:42:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:42:20,822 INFO L175 Difference]: Start difference. First operand has 81 places, 59 transitions, 234 flow. Second operand 5 states and 857 transitions. [2023-08-30 05:42:20,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 448 flow [2023-08-30 05:42:20,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:20,826 INFO L231 Difference]: Finished difference. Result has 82 places, 57 transitions, 235 flow [2023-08-30 05:42:20,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=82, PETRI_TRANSITIONS=57} [2023-08-30 05:42:20,826 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-08-30 05:42:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 57 transitions, 235 flow [2023-08-30 05:42:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 05:42:20,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:20,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:20,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 05:42:21,033 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 05:42:21,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:21,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash 513513515, now seen corresponding path program 1 times [2023-08-30 05:42:21,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:21,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837111317] [2023-08-30 05:42:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:21,034 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 05:42:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:21,035 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 05:42:21,036 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 05:42:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:42:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:21,173 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:42:21,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:42:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:42:21,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:21,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837111317] [2023-08-30 05:42:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837111317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:21,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:21,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:42:21,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550090787] [2023-08-30 05:42:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:42:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:42:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:42:21,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 375 [2023-08-30 05:42:21,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 57 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 05:42:21,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:21,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 375 [2023-08-30 05:42:21,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:22,365 INFO L130 PetriNetUnfolder]: 7220/12011 cut-off events. [2023-08-30 05:42:22,365 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-08-30 05:42:22,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 12011 events. 7220/12011 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 88230 event pairs, 7218 based on Foata normal form. 0/10805 useless extension candidates. Maximal degree in co-relation 23930. Up to 11332 conditions per place. [2023-08-30 05:42:22,434 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-08-30 05:42:22,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 54 transitions, 315 flow [2023-08-30 05:42:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:42:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:42:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 677 transitions. [2023-08-30 05:42:22,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513333333333333 [2023-08-30 05:42:22,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 677 transitions. [2023-08-30 05:42:22,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 677 transitions. [2023-08-30 05:42:22,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:22,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 677 transitions. [2023-08-30 05:42:22,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 05:42:22,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:22,442 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:22,442 INFO L175 Difference]: Start difference. First operand has 82 places, 57 transitions, 235 flow. Second operand 4 states and 677 transitions. [2023-08-30 05:42:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 54 transitions, 315 flow [2023-08-30 05:42:22,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 54 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:22,444 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 234 flow [2023-08-30 05:42:22,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2023-08-30 05:42:22,445 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 11 predicate places. [2023-08-30 05:42:22,445 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 234 flow [2023-08-30 05:42:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 05:42:22,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:22,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:22,458 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 05:42:22,655 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 05:42:22,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:22,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash 513513516, now seen corresponding path program 1 times [2023-08-30 05:42:22,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:22,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115677397] [2023-08-30 05:42:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:22,656 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 05:42:22,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:22,657 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 05:42:22,658 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 05:42:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:42:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:22,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:22,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:23,055 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 05:42:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:23,618 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 05:42:23,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:23,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115677397] [2023-08-30 05:42:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115677397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:23,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:23,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999689765] [2023-08-30 05:42:23,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:25,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 375 [2023-08-30 05:42:25,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 234 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:25,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:25,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 375 [2023-08-30 05:42:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:28,396 INFO L130 PetriNetUnfolder]: 8690/14223 cut-off events. [2023-08-30 05:42:28,397 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-30 05:42:28,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28332 conditions, 14223 events. 8690/14223 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 104930 event pairs, 7463 based on Foata normal form. 0/12331 useless extension candidates. Maximal degree in co-relation 28305. Up to 9709 conditions per place. [2023-08-30 05:42:28,445 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 117 selfloop transitions, 14 changer transitions 0/141 dead transitions. [2023-08-30 05:42:28,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 694 flow [2023-08-30 05:42:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1521 transitions. [2023-08-30 05:42:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45066666666666666 [2023-08-30 05:42:28,451 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1521 transitions. [2023-08-30 05:42:28,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1521 transitions. [2023-08-30 05:42:28,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:28,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1521 transitions. [2023-08-30 05:42:28,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states 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 05:42:28,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:28,460 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:28,460 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 234 flow. Second operand 9 states and 1521 transitions. [2023-08-30 05:42:28,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 694 flow [2023-08-30 05:42:28,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 141 transitions, 687 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:42:28,463 INFO L231 Difference]: Finished difference. Result has 87 places, 58 transitions, 285 flow [2023-08-30 05:42:28,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=87, PETRI_TRANSITIONS=58} [2023-08-30 05:42:28,464 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-30 05:42:28,464 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 58 transitions, 285 flow [2023-08-30 05:42:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:42:28,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:28,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:28,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 05:42:28,672 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 05:42:28,672 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:28,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 513513647, now seen corresponding path program 1 times [2023-08-30 05:42:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:28,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970225294] [2023-08-30 05:42:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:28,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:42:28,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:28,674 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 05:42:28,675 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 05:42:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:28,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:42:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:28,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:28,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:29,027 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 05:42:29,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:29,851 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 05:42:29,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970225294] [2023-08-30 05:42:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970225294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189020189] [2023-08-30 05:42:29,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:33,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-30 05:42:33,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 58 transitions, 285 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states 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 05:42:33,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:33,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-30 05:42:33,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:37,743 INFO L130 PetriNetUnfolder]: 6485/10880 cut-off events. [2023-08-30 05:42:37,743 INFO L131 PetriNetUnfolder]: For 1911/2571 co-relation queries the response was YES. [2023-08-30 05:42:37,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23761 conditions, 10880 events. 6485/10880 cut-off events. For 1911/2571 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 79527 event pairs, 6483 based on Foata normal form. 114/10828 useless extension candidates. Maximal degree in co-relation 23732. Up to 7555 conditions per place. [2023-08-30 05:42:37,802 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 83 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-30 05:42:37,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 105 transitions, 575 flow [2023-08-30 05:42:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1511 transitions. [2023-08-30 05:42:37,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477037037037037 [2023-08-30 05:42:37,807 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1511 transitions. [2023-08-30 05:42:37,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1511 transitions. [2023-08-30 05:42:37,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:37,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1511 transitions. [2023-08-30 05:42:37,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.88888888888889) internal successors, (1511), 9 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states 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 05:42:37,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:37,816 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:37,816 INFO L175 Difference]: Start difference. First operand has 87 places, 58 transitions, 285 flow. Second operand 9 states and 1511 transitions. [2023-08-30 05:42:37,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 105 transitions, 575 flow [2023-08-30 05:42:37,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 531 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-30 05:42:37,825 INFO L231 Difference]: Finished difference. Result has 87 places, 56 transitions, 253 flow [2023-08-30 05:42:37,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=87, PETRI_TRANSITIONS=56} [2023-08-30 05:42:37,826 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-30 05:42:37,826 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 56 transitions, 253 flow [2023-08-30 05:42:37,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states 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 05:42:37,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:37,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:37,844 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 05:42:38,037 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 05:42:38,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:38,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1109925785, now seen corresponding path program 1 times [2023-08-30 05:42:38,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:38,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945275450] [2023-08-30 05:42:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:38,038 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 05:42:38,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:38,039 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 05:42:38,042 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 05:42:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:42:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:38,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:38,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:38,563 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 05:42:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:38,995 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 05:42:38,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945275450] [2023-08-30 05:42:38,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945275450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:38,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:38,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:42:38,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724469709] [2023-08-30 05:42:38,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:38,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-08-30 05:42:41,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 56 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 05:42:41,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:41,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-08-30 05:42:41,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:44,336 INFO L130 PetriNetUnfolder]: 6227/10454 cut-off events. [2023-08-30 05:42:44,336 INFO L131 PetriNetUnfolder]: For 1740/2400 co-relation queries the response was YES. [2023-08-30 05:42:44,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22837 conditions, 10454 events. 6227/10454 cut-off events. For 1740/2400 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 75596 event pairs, 5271 based on Foata normal form. 114/10411 useless extension candidates. Maximal degree in co-relation 22812. Up to 7555 conditions per place. [2023-08-30 05:42:44,397 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 103 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2023-08-30 05:42:44,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 658 flow [2023-08-30 05:42:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1528 transitions. [2023-08-30 05:42:44,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527407407407407 [2023-08-30 05:42:44,401 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1528 transitions. [2023-08-30 05:42:44,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1528 transitions. [2023-08-30 05:42:44,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:44,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1528 transitions. [2023-08-30 05:42:44,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.77777777777777) internal successors, (1528), 9 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states 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 05:42:44,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:44,410 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:42:44,410 INFO L175 Difference]: Start difference. First operand has 87 places, 56 transitions, 253 flow. Second operand 9 states and 1528 transitions. [2023-08-30 05:42:44,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 658 flow [2023-08-30 05:42:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 635 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 05:42:44,416 INFO L231 Difference]: Finished difference. Result has 91 places, 60 transitions, 292 flow [2023-08-30 05:42:44,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=91, PETRI_TRANSITIONS=60} [2023-08-30 05:42:44,416 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 23 predicate places. [2023-08-30 05:42:44,416 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 60 transitions, 292 flow [2023-08-30 05:42:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.75) internal successors, (1270), 8 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 05:42:44,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:44,417 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:44,427 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 05:42:44,626 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 05:42:44,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:44,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash -184157497, now seen corresponding path program 2 times [2023-08-30 05:42:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943790136] [2023-08-30 05:42:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:44,628 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 05:42:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:44,628 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 05:42:44,629 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 05:42:44,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:42:44,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:42:44,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:44,833 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:44,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 05:42:45,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:45,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943790136] [2023-08-30 05:42:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943790136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:45,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:45,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:42:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155703200] [2023-08-30 05:42:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:42:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:42:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:42:45,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 375 [2023-08-30 05:42:45,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 60 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 05:42:45,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:45,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 375 [2023-08-30 05:42:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:46,389 INFO L130 PetriNetUnfolder]: 5757/9633 cut-off events. [2023-08-30 05:42:46,389 INFO L131 PetriNetUnfolder]: For 7057/7057 co-relation queries the response was YES. [2023-08-30 05:42:46,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24212 conditions, 9633 events. 5757/9633 cut-off events. For 7057/7057 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 68563 event pairs, 2378 based on Foata normal form. 684/10181 useless extension candidates. Maximal degree in co-relation 24185. Up to 4957 conditions per place. [2023-08-30 05:42:46,444 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 61 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2023-08-30 05:42:46,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 498 flow [2023-08-30 05:42:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:42:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:42:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2023-08-30 05:42:46,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613333333333333 [2023-08-30 05:42:46,446 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2023-08-30 05:42:46,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2023-08-30 05:42:46,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:46,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2023-08-30 05:42:46,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 05:42:46,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:46,450 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:46,450 INFO L175 Difference]: Start difference. First operand has 91 places, 60 transitions, 292 flow. Second operand 4 states and 692 transitions. [2023-08-30 05:42:46,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 498 flow [2023-08-30 05:42:46,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:42:46,457 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 282 flow [2023-08-30 05:42:46,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-08-30 05:42:46,457 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-30 05:42:46,458 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 282 flow [2023-08-30 05:42:46,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 05:42:46,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:46,458 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:42:46,467 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 05:42:46,667 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 05:42:46,668 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:46,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash -184157366, now seen corresponding path program 2 times [2023-08-30 05:42:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:46,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750366160] [2023-08-30 05:42:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:42:46,669 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 05:42:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:46,669 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 05:42:46,670 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 05:42:46,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:42:46,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:42:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:46,857 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 05:42:46,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:42:46,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750366160] [2023-08-30 05:42:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750366160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:46,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:46,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:42:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406937620] [2023-08-30 05:42:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:42:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:42:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:42:47,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 375 [2023-08-30 05:42:47,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 05:42:47,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:47,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 375 [2023-08-30 05:42:47,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:47,874 INFO L130 PetriNetUnfolder]: 4287/7355 cut-off events. [2023-08-30 05:42:47,875 INFO L131 PetriNetUnfolder]: For 7316/7316 co-relation queries the response was YES. [2023-08-30 05:42:47,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19188 conditions, 7355 events. 4287/7355 cut-off events. For 7316/7316 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52323 event pairs, 4248 based on Foata normal form. 684/7899 useless extension candidates. Maximal degree in co-relation 19162. Up to 6942 conditions per place. [2023-08-30 05:42:47,913 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-08-30 05:42:47,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 58 transitions, 372 flow [2023-08-30 05:42:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:42:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:42:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-30 05:42:47,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573333333333333 [2023-08-30 05:42:47,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-30 05:42:47,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-30 05:42:47,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:47,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-30 05:42:47,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 05:42:47,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:47,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:42:47,918 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 282 flow. Second operand 4 states and 686 transitions. [2023-08-30 05:42:47,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 58 transitions, 372 flow [2023-08-30 05:42:47,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 58 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:47,925 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 272 flow [2023-08-30 05:42:47,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2023-08-30 05:42:47,926 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2023-08-30 05:42:47,926 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 272 flow [2023-08-30 05:42:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 05:42:47,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:47,927 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 05:42:47,936 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 05:42:48,133 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 05:42:48,134 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:42:48,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1454691103, now seen corresponding path program 3 times [2023-08-30 05:42:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:42:48,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416623682] [2023-08-30 05:42:48,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:42:48,134 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 05:42:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:42:48,135 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 05:42:48,136 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 05:42:48,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:42:48,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:42:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:42:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:42:48,413 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:42:48,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:42:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:48,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:42:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:51,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:42:51,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416623682] [2023-08-30 05:42:51,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416623682] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:42:51,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:42:51,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:42:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010077308] [2023-08-30 05:42:51,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:42:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:42:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:42:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:42:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:43:07,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-30 05:43:07,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 272 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 05:43:07,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:07,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-30 05:43:07,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:25,906 INFO L130 PetriNetUnfolder]: 11441/19694 cut-off events. [2023-08-30 05:43:25,906 INFO L131 PetriNetUnfolder]: For 10304/10304 co-relation queries the response was YES. [2023-08-30 05:43:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49051 conditions, 19694 events. 11441/19694 cut-off events. For 10304/10304 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 156447 event pairs, 11385 based on Foata normal form. 12/19354 useless extension candidates. Maximal degree in co-relation 49025. Up to 3557 conditions per place. [2023-08-30 05:43:25,998 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 554 selfloop transitions, 24 changer transitions 0/588 dead transitions. [2023-08-30 05:43:25,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 588 transitions, 3212 flow [2023-08-30 05:43:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 05:43:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 05:43:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4496 transitions. [2023-08-30 05:43:26,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49955555555555553 [2023-08-30 05:43:26,006 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4496 transitions. [2023-08-30 05:43:26,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4496 transitions. [2023-08-30 05:43:26,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:26,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4496 transitions. [2023-08-30 05:43:26,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.33333333333334) internal successors, (4496), 24 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states 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 05:43:26,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states 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 05:43:26,021 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 375.0) internal successors, (9375), 25 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states 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 05:43:26,021 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 272 flow. Second operand 24 states and 4496 transitions. [2023-08-30 05:43:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 588 transitions, 3212 flow [2023-08-30 05:43:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 588 transitions, 3188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:43:26,041 INFO L231 Difference]: Finished difference. Result has 120 places, 71 transitions, 454 flow [2023-08-30 05:43:26,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=454, PETRI_PLACES=120, PETRI_TRANSITIONS=71} [2023-08-30 05:43:26,042 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2023-08-30 05:43:26,042 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 71 transitions, 454 flow [2023-08-30 05:43:26,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 05:43:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:26,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:26,056 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 05:43:26,253 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 05:43:26,253 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:43:26,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1556871102, now seen corresponding path program 2 times [2023-08-30 05:43:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:26,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637614563] [2023-08-30 05:43:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:43:26,254 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 05:43:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:26,255 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 05:43:26,258 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 05:43:26,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:43:26,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:43:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:26,430 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:43:26,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:43:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 05:43:26,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:43:26,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:26,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637614563] [2023-08-30 05:43:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637614563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:26,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:43:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072200310] [2023-08-30 05:43:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:43:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:43:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:43:26,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-30 05:43:26,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 71 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 05:43:26,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:26,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-30 05:43:26,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:28,422 INFO L130 PetriNetUnfolder]: 9893/17112 cut-off events. [2023-08-30 05:43:28,422 INFO L131 PetriNetUnfolder]: For 9089/9089 co-relation queries the response was YES. [2023-08-30 05:43:28,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41575 conditions, 17112 events. 9893/17112 cut-off events. For 9089/9089 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 131876 event pairs, 3213 based on Foata normal form. 684/17473 useless extension candidates. Maximal degree in co-relation 41536. Up to 13297 conditions per place. [2023-08-30 05:43:28,524 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 61 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-08-30 05:43:28,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 84 transitions, 642 flow [2023-08-30 05:43:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:43:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:43:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-08-30 05:43:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-08-30 05:43:28,525 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-08-30 05:43:28,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-08-30 05:43:28,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:28,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-08-30 05:43:28,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 05:43:28,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:43:28,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 05:43:28,529 INFO L175 Difference]: Start difference. First operand has 120 places, 71 transitions, 454 flow. Second operand 4 states and 695 transitions. [2023-08-30 05:43:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 84 transitions, 642 flow [2023-08-30 05:43:28,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 84 transitions, 594 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 05:43:28,543 INFO L231 Difference]: Finished difference. Result has 114 places, 73 transitions, 464 flow [2023-08-30 05:43:28,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=464, PETRI_PLACES=114, PETRI_TRANSITIONS=73} [2023-08-30 05:43:28,543 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 46 predicate places. [2023-08-30 05:43:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 73 transitions, 464 flow [2023-08-30 05:43:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 05:43:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:28,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:28,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-08-30 05:43:28,753 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 05:43:28,753 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:43:28,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash -240000082, now seen corresponding path program 1 times [2023-08-30 05:43:28,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:28,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410186411] [2023-08-30 05:43:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:43:28,754 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 05:43:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:28,755 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 05:43:28,756 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 05:43:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:43:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:43:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:43:28,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:43:28,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410186411] [2023-08-30 05:43:28,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410186411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:28,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:28,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:43:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428625527] [2023-08-30 05:43:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:43:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:43:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:43:28,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:43:28,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 73 transitions, 464 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:43:28,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:28,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:43:28,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:33,971 INFO L130 PetriNetUnfolder]: 29503/51947 cut-off events. [2023-08-30 05:43:33,971 INFO L131 PetriNetUnfolder]: For 34972/34972 co-relation queries the response was YES. [2023-08-30 05:43:34,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127575 conditions, 51947 events. 29503/51947 cut-off events. For 34972/34972 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 460961 event pairs, 5100 based on Foata normal form. 600/52527 useless extension candidates. Maximal degree in co-relation 127534. Up to 15641 conditions per place. [2023-08-30 05:43:34,446 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 166 selfloop transitions, 16 changer transitions 0/188 dead transitions. [2023-08-30 05:43:34,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 1262 flow [2023-08-30 05:43:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:43:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:43:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1566 transitions. [2023-08-30 05:43:34,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464 [2023-08-30 05:43:34,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1566 transitions. [2023-08-30 05:43:34,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1566 transitions. [2023-08-30 05:43:34,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:34,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1566 transitions. [2023-08-30 05:43:34,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states 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 05:43:34,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:43:34,452 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:43:34,452 INFO L175 Difference]: Start difference. First operand has 114 places, 73 transitions, 464 flow. Second operand 9 states and 1566 transitions. [2023-08-30 05:43:34,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 1262 flow [2023-08-30 05:43:34,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 188 transitions, 1174 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-30 05:43:34,587 INFO L231 Difference]: Finished difference. Result has 125 places, 87 transitions, 530 flow [2023-08-30 05:43:34,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=530, PETRI_PLACES=125, PETRI_TRANSITIONS=87} [2023-08-30 05:43:34,588 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 57 predicate places. [2023-08-30 05:43:34,588 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 87 transitions, 530 flow [2023-08-30 05:43:34,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:43:34,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:34,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:34,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:43:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:43:34,792 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:43:34,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -712728888, now seen corresponding path program 2 times [2023-08-30 05:43:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779642289] [2023-08-30 05:43:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:43:34,792 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 05:43:34,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:34,793 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:43:34,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 05:43:34,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:43:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:43:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:43:34,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:43:34,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:34,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779642289] [2023-08-30 05:43:34,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779642289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:34,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:34,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:43:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463065225] [2023-08-30 05:43:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:43:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:43:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:43:34,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 375 [2023-08-30 05:43:34,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 87 transitions, 530 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 05:43:34,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:34,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 375 [2023-08-30 05:43:34,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:39,876 INFO L130 PetriNetUnfolder]: 24743/44827 cut-off events. [2023-08-30 05:43:39,876 INFO L131 PetriNetUnfolder]: For 27121/27121 co-relation queries the response was YES. [2023-08-30 05:43:40,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113636 conditions, 44827 events. 24743/44827 cut-off events. For 27121/27121 co-relation queries the response was YES. Maximal size of possible extension queue 1290. Compared 407168 event pairs, 20420 based on Foata normal form. 340/44507 useless extension candidates. Maximal degree in co-relation 113590. Up to 37388 conditions per place. [2023-08-30 05:43:40,285 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 84 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-30 05:43:40,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 101 transitions, 758 flow [2023-08-30 05:43:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:43:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:43:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-30 05:43:40,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49066666666666664 [2023-08-30 05:43:40,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-30 05:43:40,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-30 05:43:40,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:40,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-30 05:43:40,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 05:43:40,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:43:40,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:43:40,290 INFO L175 Difference]: Start difference. First operand has 125 places, 87 transitions, 530 flow. Second operand 3 states and 552 transitions. [2023-08-30 05:43:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 101 transitions, 758 flow [2023-08-30 05:43:40,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 101 transitions, 758 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 05:43:40,764 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 538 flow [2023-08-30 05:43:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2023-08-30 05:43:40,765 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 60 predicate places. [2023-08-30 05:43:40,765 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 538 flow [2023-08-30 05:43:40,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 05:43:40,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:40,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:40,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 05:43:40,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:43:40,970 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:43:40,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2095935382, now seen corresponding path program 3 times [2023-08-30 05:43:40,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:40,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140005195] [2023-08-30 05:43:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:43:40,971 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 05:43:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:40,972 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:43:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 05:43:41,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 05:43:41,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:43:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:43:41,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:43:41,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140005195] [2023-08-30 05:43:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140005195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:41,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:43:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318663624] [2023-08-30 05:43:41,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:41,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:43:41,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:43:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:43:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:43:41,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:43:41,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:41,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:43:41,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:49,837 INFO L130 PetriNetUnfolder]: 41423/73307 cut-off events. [2023-08-30 05:43:49,837 INFO L131 PetriNetUnfolder]: For 53265/53265 co-relation queries the response was YES. [2023-08-30 05:43:50,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194806 conditions, 73307 events. 41423/73307 cut-off events. For 53265/53265 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 679235 event pairs, 9940 based on Foata normal form. 600/73767 useless extension candidates. Maximal degree in co-relation 194758. Up to 43761 conditions per place. [2023-08-30 05:43:50,617 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 168 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2023-08-30 05:43:50,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 1298 flow [2023-08-30 05:43:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:43:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:43:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1558 transitions. [2023-08-30 05:43:50,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616296296296296 [2023-08-30 05:43:50,619 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1558 transitions. [2023-08-30 05:43:50,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1558 transitions. [2023-08-30 05:43:50,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:50,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1558 transitions. [2023-08-30 05:43:50,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 05:43:50,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:43:50,623 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:43:50,623 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 538 flow. Second operand 9 states and 1558 transitions. [2023-08-30 05:43:50,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 1298 flow [2023-08-30 05:43:51,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 190 transitions, 1294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:43:51,526 INFO L231 Difference]: Finished difference. Result has 138 places, 100 transitions, 671 flow [2023-08-30 05:43:51,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=138, PETRI_TRANSITIONS=100} [2023-08-30 05:43:51,526 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2023-08-30 05:43:51,527 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 100 transitions, 671 flow [2023-08-30 05:43:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:43:51,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:51,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:43:51,535 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 (23)] Ended with exit code 0 [2023-08-30 05:43:51,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:43:51,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:43:51,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -670632152, now seen corresponding path program 4 times [2023-08-30 05:43:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:43:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941691097] [2023-08-30 05:43:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:43:51,730 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 05:43:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:43:51,730 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:43:51,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 05:43:51,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:43:51,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:43:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:43:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:43:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:43:52,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:43:52,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:43:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941691097] [2023-08-30 05:43:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941691097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:52,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:52,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:43:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558226009] [2023-08-30 05:43:52,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:52,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:43:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:43:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:43:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:43:52,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:43:52,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 100 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:43:52,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:52,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:43:52,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:02,259 INFO L130 PetriNetUnfolder]: 45303/81127 cut-off events. [2023-08-30 05:44:02,259 INFO L131 PetriNetUnfolder]: For 80353/80353 co-relation queries the response was YES. [2023-08-30 05:44:02,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225567 conditions, 81127 events. 45303/81127 cut-off events. For 80353/80353 co-relation queries the response was YES. Maximal size of possible extension queue 2060. Compared 770810 event pairs, 12100 based on Foata normal form. 600/81587 useless extension candidates. Maximal degree in co-relation 225514. Up to 52401 conditions per place. [2023-08-30 05:44:03,209 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 180 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2023-08-30 05:44:03,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 1475 flow [2023-08-30 05:44:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 05:44:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 05:44:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1888 transitions. [2023-08-30 05:44:03,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576969696969697 [2023-08-30 05:44:03,212 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1888 transitions. [2023-08-30 05:44:03,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1888 transitions. [2023-08-30 05:44:03,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:03,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1888 transitions. [2023-08-30 05:44:03,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.63636363636363) internal successors, (1888), 11 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states 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 05:44:03,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states 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 05:44:03,218 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states 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 05:44:03,218 INFO L175 Difference]: Start difference. First operand has 138 places, 100 transitions, 671 flow. Second operand 11 states and 1888 transitions. [2023-08-30 05:44:03,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 1475 flow [2023-08-30 05:44:04,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 206 transitions, 1473 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 05:44:04,734 INFO L231 Difference]: Finished difference. Result has 154 places, 109 transitions, 820 flow [2023-08-30 05:44:04,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=154, PETRI_TRANSITIONS=109} [2023-08-30 05:44:04,734 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 86 predicate places. [2023-08-30 05:44:04,734 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 109 transitions, 820 flow [2023-08-30 05:44:04,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:04,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:04,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:04,743 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 (24)] Forceful destruction successful, exit code 0 [2023-08-30 05:44:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:44:04,941 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:44:04,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1852416014, now seen corresponding path program 5 times [2023-08-30 05:44:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043199692] [2023-08-30 05:44:04,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 05:44:04,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:44:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:04,943 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:44:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 05:44:05,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:44:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:44:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:44:05,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:44:05,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043199692] [2023-08-30 05:44:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043199692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:44:05,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:44:05,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:44:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238609070] [2023-08-30 05:44:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:44:05,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:44:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:44:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:44:05,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 375 [2023-08-30 05:44:05,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 109 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 05:44:05,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:05,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 375 [2023-08-30 05:44:05,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:14,736 INFO L130 PetriNetUnfolder]: 40381/74115 cut-off events. [2023-08-30 05:44:14,736 INFO L131 PetriNetUnfolder]: For 86201/86581 co-relation queries the response was YES. [2023-08-30 05:44:15,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210895 conditions, 74115 events. 40381/74115 cut-off events. For 86201/86581 co-relation queries the response was YES. Maximal size of possible extension queue 1936. Compared 714829 event pairs, 35898 based on Foata normal form. 740/73843 useless extension candidates. Maximal degree in co-relation 210834. Up to 64428 conditions per place. [2023-08-30 05:44:15,628 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 91 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-30 05:44:15,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 119 transitions, 1026 flow [2023-08-30 05:44:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:44:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:44:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-30 05:44:15,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49066666666666664 [2023-08-30 05:44:15,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-30 05:44:15,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-30 05:44:15,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:15,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-30 05:44:15,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 05:44:15,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:44:15,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 05:44:15,631 INFO L175 Difference]: Start difference. First operand has 154 places, 109 transitions, 820 flow. Second operand 3 states and 552 transitions. [2023-08-30 05:44:15,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 119 transitions, 1026 flow [2023-08-30 05:44:17,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 119 transitions, 1011 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 05:44:17,344 INFO L231 Difference]: Finished difference. Result has 156 places, 106 transitions, 778 flow [2023-08-30 05:44:17,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=156, PETRI_TRANSITIONS=106} [2023-08-30 05:44:17,344 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 88 predicate places. [2023-08-30 05:44:17,344 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 106 transitions, 778 flow [2023-08-30 05:44:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 05:44:17,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:17,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:17,462 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 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:44:17,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:44:17,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:44:17,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 181024682, now seen corresponding path program 6 times [2023-08-30 05:44:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:17,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501089463] [2023-08-30 05:44:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 05:44:17,656 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 05:44:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:17,658 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:44:17,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:44:17,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 05:44:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:44:17,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:44:17,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:44:17,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:17,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501089463] [2023-08-30 05:44:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501089463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:44:17,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:44:17,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:44:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266427030] [2023-08-30 05:44:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:44:17,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:44:17,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:44:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:44:17,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:44:17,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 106 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:17,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:17,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:44:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:26,433 INFO L130 PetriNetUnfolder]: 36823/67027 cut-off events. [2023-08-30 05:44:26,433 INFO L131 PetriNetUnfolder]: For 84269/84269 co-relation queries the response was YES. [2023-08-30 05:44:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198088 conditions, 67027 events. 36823/67027 cut-off events. For 84269/84269 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 629594 event pairs, 11260 based on Foata normal form. 600/67367 useless extension candidates. Maximal degree in co-relation 198026. Up to 50481 conditions per place. [2023-08-30 05:44:27,262 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 153 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2023-08-30 05:44:27,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 175 transitions, 1336 flow [2023-08-30 05:44:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:44:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:44:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1707 transitions. [2023-08-30 05:44:27,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552 [2023-08-30 05:44:27,264 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1707 transitions. [2023-08-30 05:44:27,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1707 transitions. [2023-08-30 05:44:27,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:27,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1707 transitions. [2023-08-30 05:44:27,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.7) internal successors, (1707), 10 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states 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 05:44:27,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 05:44:27,270 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 05:44:27,270 INFO L175 Difference]: Start difference. First operand has 156 places, 106 transitions, 778 flow. Second operand 10 states and 1707 transitions. [2023-08-30 05:44:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 175 transitions, 1336 flow [2023-08-30 05:44:29,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 175 transitions, 1329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:44:29,247 INFO L231 Difference]: Finished difference. Result has 163 places, 104 transitions, 791 flow [2023-08-30 05:44:29,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=791, PETRI_PLACES=163, PETRI_TRANSITIONS=104} [2023-08-30 05:44:29,248 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 95 predicate places. [2023-08-30 05:44:29,248 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 104 transitions, 791 flow [2023-08-30 05:44:29,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:29,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:29,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:29,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:44:29,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:44:29,449 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:44:29,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1279514246, now seen corresponding path program 7 times [2023-08-30 05:44:29,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:29,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485593888] [2023-08-30 05:44:29,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 05:44:29,450 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 05:44:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:29,451 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:44:29,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:44:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:44:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:44:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:44:29,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:44:29,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:29,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485593888] [2023-08-30 05:44:29,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485593888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:44:29,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:44:29,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:44:29,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264474580] [2023-08-30 05:44:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:44:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:44:29,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:44:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:44:29,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:44:29,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 104 transitions, 791 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:29,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:29,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:44:29,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:36,925 INFO L130 PetriNetUnfolder]: 30863/57287 cut-off events. [2023-08-30 05:44:36,925 INFO L131 PetriNetUnfolder]: For 81393/81393 co-relation queries the response was YES. [2023-08-30 05:44:37,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171177 conditions, 57287 events. 30863/57287 cut-off events. For 81393/81393 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 538907 event pairs, 9580 based on Foata normal form. 600/57627 useless extension candidates. Maximal degree in co-relation 171114. Up to 41201 conditions per place. [2023-08-30 05:44:37,902 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 144 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-30 05:44:37,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 165 transitions, 1306 flow [2023-08-30 05:44:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:44:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:44:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1540 transitions. [2023-08-30 05:44:37,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562962962962963 [2023-08-30 05:44:37,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1540 transitions. [2023-08-30 05:44:37,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1540 transitions. [2023-08-30 05:44:37,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:37,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1540 transitions. [2023-08-30 05:44:37,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.11111111111111) internal successors, (1540), 9 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 05:44:37,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:44:37,909 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:44:37,909 INFO L175 Difference]: Start difference. First operand has 163 places, 104 transitions, 791 flow. Second operand 9 states and 1540 transitions. [2023-08-30 05:44:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 165 transitions, 1306 flow [2023-08-30 05:44:39,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 165 transitions, 1260 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-30 05:44:39,214 INFO L231 Difference]: Finished difference. Result has 161 places, 102 transitions, 762 flow [2023-08-30 05:44:39,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=161, PETRI_TRANSITIONS=102} [2023-08-30 05:44:39,214 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 93 predicate places. [2023-08-30 05:44:39,215 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 102 transitions, 762 flow [2023-08-30 05:44:39,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:39,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:39,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:39,222 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 (27)] Ended with exit code 0 [2023-08-30 05:44:39,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:44:39,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:44:39,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash 233984148, now seen corresponding path program 8 times [2023-08-30 05:44:39,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:39,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554789733] [2023-08-30 05:44:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:44:39,418 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 05:44:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:39,418 INFO L229 MonitoredProcess]: Starting monitored process 28 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 05:44:39,420 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 (28)] Waiting until timeout for monitored process [2023-08-30 05:44:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:44:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:44:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:44:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:44:39,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:44:39,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:39,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554789733] [2023-08-30 05:44:39,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554789733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:44:39,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:44:39,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:44:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884430014] [2023-08-30 05:44:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:44:39,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:44:39,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:44:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:44:39,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 375 [2023-08-30 05:44:39,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 102 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:39,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:39,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 375 [2023-08-30 05:44:39,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:46,177 INFO L130 PetriNetUnfolder]: 26023/51047 cut-off events. [2023-08-30 05:44:46,177 INFO L131 PetriNetUnfolder]: For 69537/69537 co-relation queries the response was YES. [2023-08-30 05:44:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154085 conditions, 51047 events. 26023/51047 cut-off events. For 69537/69537 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 497611 event pairs, 6140 based on Foata normal form. 600/51627 useless extension candidates. Maximal degree in co-relation 154022. Up to 11520 conditions per place. [2023-08-30 05:44:46,968 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 140 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2023-08-30 05:44:46,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 180 transitions, 1424 flow [2023-08-30 05:44:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:44:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:44:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1549 transitions. [2023-08-30 05:44:46,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45896296296296296 [2023-08-30 05:44:46,971 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1549 transitions. [2023-08-30 05:44:46,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1549 transitions. [2023-08-30 05:44:46,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:46,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1549 transitions. [2023-08-30 05:44:46,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.11111111111111) internal successors, (1549), 9 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states 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 05:44:46,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:44:46,974 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:44:46,974 INFO L175 Difference]: Start difference. First operand has 161 places, 102 transitions, 762 flow. Second operand 9 states and 1549 transitions. [2023-08-30 05:44:46,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 180 transitions, 1424 flow [2023-08-30 05:44:48,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 180 transitions, 1394 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 05:44:48,252 INFO L231 Difference]: Finished difference. Result has 164 places, 107 transitions, 879 flow [2023-08-30 05:44:48,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=164, PETRI_TRANSITIONS=107} [2023-08-30 05:44:48,253 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2023-08-30 05:44:48,253 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 107 transitions, 879 flow [2023-08-30 05:44:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 05:44:48,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:48,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:44:48,263 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 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:44:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:44:48,460 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:44:48,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1357032408, now seen corresponding path program 1 times [2023-08-30 05:44:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:44:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164697994] [2023-08-30 05:44:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:44:48,461 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 05:44:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:44:48,462 INFO L229 MonitoredProcess]: Starting monitored process 29 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 05:44:48,463 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 (29)] Waiting until timeout for monitored process [2023-08-30 05:44:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:44:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 05:44:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:44:48,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:44:48,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:44:48,956 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 05:44:48,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:44:50,160 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 05:44:50,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:44:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164697994] [2023-08-30 05:44:50,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164697994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:44:50,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:44:50,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:44:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960663234] [2023-08-30 05:44:50,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:44:50,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:44:50,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:44:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:44:50,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:44:54,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-08-30 05:44:54,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 107 transitions, 879 flow. Second operand has 10 states, 10 states have (on average 158.8) internal successors, (1588), 10 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 05:44:54,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:54,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-08-30 05:44:54,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:45:04,239 INFO L130 PetriNetUnfolder]: 21423/40883 cut-off events. [2023-08-30 05:45:04,239 INFO L131 PetriNetUnfolder]: For 72276/72773 co-relation queries the response was YES. [2023-08-30 05:45:04,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126292 conditions, 40883 events. 21423/40883 cut-off events. For 72276/72773 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 393931 event pairs, 20200 based on Foata normal form. 123/39245 useless extension candidates. Maximal degree in co-relation 126226. Up to 33661 conditions per place. [2023-08-30 05:45:04,613 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 146 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2023-08-30 05:45:04,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 200 transitions, 1741 flow [2023-08-30 05:45:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 05:45:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 05:45:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1822 transitions. [2023-08-30 05:45:04,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416969696969697 [2023-08-30 05:45:04,616 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1822 transitions. [2023-08-30 05:45:04,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1822 transitions. [2023-08-30 05:45:04,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:45:04,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1822 transitions. [2023-08-30 05:45:04,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 165.63636363636363) internal successors, (1822), 11 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states 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 05:45:04,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states 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 05:45:04,620 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states 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 05:45:04,620 INFO L175 Difference]: Start difference. First operand has 164 places, 107 transitions, 879 flow. Second operand 11 states and 1822 transitions. [2023-08-30 05:45:04,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 200 transitions, 1741 flow [2023-08-30 05:45:05,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 200 transitions, 1643 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 05:45:05,384 INFO L231 Difference]: Finished difference. Result has 172 places, 115 transitions, 928 flow [2023-08-30 05:45:05,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=928, PETRI_PLACES=172, PETRI_TRANSITIONS=115} [2023-08-30 05:45:05,385 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 104 predicate places. [2023-08-30 05:45:05,385 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 115 transitions, 928 flow [2023-08-30 05:45:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.8) internal successors, (1588), 10 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 05:45:05,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:45:05,386 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 05:45:05,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-08-30 05:45:05,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:45:05,590 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:45:05,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:45:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 95688415, now seen corresponding path program 4 times [2023-08-30 05:45:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:45:05,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563674450] [2023-08-30 05:45:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:45:05,590 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 05:45:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:45:05,591 INFO L229 MonitoredProcess]: Starting monitored process 30 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 05:45:05,592 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 (30)] Waiting until timeout for monitored process [2023-08-30 05:45:05,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:45:05,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:45:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 05:45:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:45:05,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:45:05,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:45:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:45:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:45:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:45:14,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:45:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563674450] [2023-08-30 05:45:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563674450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:45:14,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:45:14,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 05:45:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648554355] [2023-08-30 05:45:14,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:45:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 05:45:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:45:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 05:45:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 05:46:18,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-30 05:46:18,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 115 transitions, 928 flow. Second operand has 48 states, 48 states have (on average 164.0) internal successors, (7872), 48 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states 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 05:46:18,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:46:18,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-30 05:46:18,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:46:41,307 WARN L222 SmtUtils]: Spent 14.58s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:46:53,802 WARN L222 SmtUtils]: Spent 10.86s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:47:06,348 WARN L222 SmtUtils]: Spent 10.76s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:47:17,094 WARN L222 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:47:27,494 WARN L222 SmtUtils]: Spent 8.50s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:47:38,878 WARN L222 SmtUtils]: Spent 9.57s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:47:46,402 WARN L222 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:48:00,369 WARN L222 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:48:55,688 INFO L130 PetriNetUnfolder]: 48287/92144 cut-off events. [2023-08-30 05:48:55,688 INFO L131 PetriNetUnfolder]: For 156775/157087 co-relation queries the response was YES. [2023-08-30 05:48:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293226 conditions, 92144 events. 48287/92144 cut-off events. For 156775/157087 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 927191 event pairs, 46395 based on Foata normal form. 68/88272 useless extension candidates. Maximal degree in co-relation 293159. Up to 12901 conditions per place. [2023-08-30 05:48:57,330 INFO L137 encePairwiseOnDemand]: 371/375 looper letters, 1886 selfloop transitions, 48 changer transitions 0/1964 dead transitions. [2023-08-30 05:48:57,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1964 transitions, 16663 flow [2023-08-30 05:48:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 05:48:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 05:48:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9062 transitions. [2023-08-30 05:48:57,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034444444444445 [2023-08-30 05:48:57,370 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9062 transitions. [2023-08-30 05:48:57,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9062 transitions. [2023-08-30 05:48:57,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:48:57,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9062 transitions. [2023-08-30 05:48:57,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 188.79166666666666) internal successors, (9062), 48 states have internal predecessors, (9062), 0 states have call successors, (0), 0 states 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 05:48:57,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 375.0) internal successors, (18375), 49 states have internal predecessors, (18375), 0 states have call successors, (0), 0 states 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 05:48:57,413 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 375.0) internal successors, (18375), 49 states have internal predecessors, (18375), 0 states have call successors, (0), 0 states 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 05:48:57,413 INFO L175 Difference]: Start difference. First operand has 172 places, 115 transitions, 928 flow. Second operand 48 states and 9062 transitions. [2023-08-30 05:48:57,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1964 transitions, 16663 flow [2023-08-30 05:49:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1964 transitions, 16651 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:49:01,633 INFO L231 Difference]: Finished difference. Result has 240 places, 140 transitions, 1280 flow [2023-08-30 05:49:01,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1280, PETRI_PLACES=240, PETRI_TRANSITIONS=140} [2023-08-30 05:49:01,633 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 172 predicate places. [2023-08-30 05:49:01,634 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 140 transitions, 1280 flow [2023-08-30 05:49:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 164.0) internal successors, (7872), 48 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states 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 05:49:01,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:49:01,635 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:49:01,645 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 (30)] Forceful destruction successful, exit code 0 [2023-08-30 05:49:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:49:01,836 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:49:01,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:49:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash -231442323, now seen corresponding path program 2 times [2023-08-30 05:49:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:49:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997740064] [2023-08-30 05:49:01,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:49:01,836 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 05:49:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:49:01,837 INFO L229 MonitoredProcess]: Starting monitored process 31 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 05:49:01,838 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 (31)] Waiting until timeout for monitored process [2023-08-30 05:49:01,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:49:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:49:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:49:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:49:02,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 05:49:02,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 05:49:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 05:49:02,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:49:02,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:49:02,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997740064] [2023-08-30 05:49:02,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997740064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:49:02,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:49:02,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:49:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143013768] [2023-08-30 05:49:02,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:49:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:49:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:49:02,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:49:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:49:02,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 375 [2023-08-30 05:49:02,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 140 transitions, 1280 flow. Second operand has 5 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 05:49:02,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:49:02,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 375 [2023-08-30 05:49:02,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:49:16,674 INFO L130 PetriNetUnfolder]: 45767/87412 cut-off events. [2023-08-30 05:49:16,675 INFO L131 PetriNetUnfolder]: For 152448/152628 co-relation queries the response was YES. [2023-08-30 05:49:18,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276289 conditions, 87412 events. 45767/87412 cut-off events. For 152448/152628 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 875651 event pairs, 35325 based on Foata normal form. 2184/84634 useless extension candidates. Maximal degree in co-relation 276196. Up to 64441 conditions per place. [2023-08-30 05:49:18,377 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 93 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2023-08-30 05:49:18,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 149 transitions, 1535 flow [2023-08-30 05:49:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:49:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:49:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 854 transitions. [2023-08-30 05:49:18,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554666666666667 [2023-08-30 05:49:18,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 854 transitions. [2023-08-30 05:49:18,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 854 transitions. [2023-08-30 05:49:18,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:49:18,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 854 transitions. [2023-08-30 05:49:18,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.8) internal successors, (854), 5 states have internal predecessors, (854), 0 states have call successors, (0), 0 states 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 05:49:18,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:49:18,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 05:49:18,382 INFO L175 Difference]: Start difference. First operand has 240 places, 140 transitions, 1280 flow. Second operand 5 states and 854 transitions. [2023-08-30 05:49:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 149 transitions, 1535 flow [2023-08-30 05:49:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 149 transitions, 1424 flow, removed 25 selfloop flow, removed 24 redundant places. [2023-08-30 05:49:20,479 INFO L231 Difference]: Finished difference. Result has 218 places, 138 transitions, 1205 flow [2023-08-30 05:49:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=218, PETRI_TRANSITIONS=138} [2023-08-30 05:49:20,480 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 150 predicate places. [2023-08-30 05:49:20,480 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 138 transitions, 1205 flow [2023-08-30 05:49:20,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 05:49:20,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:49:20,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:49:20,487 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 05:49:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:49:20,681 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:49:20,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:49:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash 339770621, now seen corresponding path program 1 times [2023-08-30 05:49:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:49:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275555867] [2023-08-30 05:49:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:49:20,682 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 05:49:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:49:20,682 INFO L229 MonitoredProcess]: Starting monitored process 32 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 05:49:20,683 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 (32)] Waiting until timeout for monitored process [2023-08-30 05:49:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:49:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:49:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:49:21,456 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-30 05:49:21,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-30 05:49:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:49:24,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:49:24,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:49:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275555867] [2023-08-30 05:49:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275555867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:49:24,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:49:24,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:49:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865594460] [2023-08-30 05:49:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:49:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:49:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:49:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:49:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-30 05:49:26,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:28,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:31,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:33,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:35,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:37,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:39,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:41,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:43,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:45,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:47,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:49,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:52,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:54,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:57,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:49:59,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:01,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:01,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-30 05:50:01,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 138 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 05:50:01,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:50:01,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-30 05:50:01,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:50:03,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:05,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:07,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:10,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:12,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:14,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:16,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:18,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:20,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:22,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:24,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:26,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:28,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:50:51,418 INFO L130 PetriNetUnfolder]: 59359/111107 cut-off events. [2023-08-30 05:50:51,418 INFO L131 PetriNetUnfolder]: For 172517/172693 co-relation queries the response was YES. [2023-08-30 05:50:53,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365121 conditions, 111107 events. 59359/111107 cut-off events. For 172517/172693 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 1109387 event pairs, 14872 based on Foata normal form. 176/107719 useless extension candidates. Maximal degree in co-relation 365029. Up to 59802 conditions per place. [2023-08-30 05:50:53,570 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 113 selfloop transitions, 21 changer transitions 42/204 dead transitions. [2023-08-30 05:50:53,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 204 transitions, 1941 flow [2023-08-30 05:50:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:50:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:50:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1212 transitions. [2023-08-30 05:50:53,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404 [2023-08-30 05:50:53,572 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1212 transitions. [2023-08-30 05:50:53,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1212 transitions. [2023-08-30 05:50:53,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:50:53,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1212 transitions. [2023-08-30 05:50:53,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.5) internal successors, (1212), 8 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:50:53,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states 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 05:50:53,576 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states 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 05:50:53,576 INFO L175 Difference]: Start difference. First operand has 218 places, 138 transitions, 1205 flow. Second operand 8 states and 1212 transitions. [2023-08-30 05:50:53,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 204 transitions, 1941 flow [2023-08-30 05:50:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 204 transitions, 1853 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:50:57,557 INFO L231 Difference]: Finished difference. Result has 226 places, 146 transitions, 1290 flow [2023-08-30 05:50:57,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=226, PETRI_TRANSITIONS=146} [2023-08-30 05:50:57,558 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 158 predicate places. [2023-08-30 05:50:57,558 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 146 transitions, 1290 flow [2023-08-30 05:50:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 05:50:57,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:50:57,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:50:57,567 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 (32)] Forceful destruction successful, exit code 0 [2023-08-30 05:50:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:50:57,760 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:50:57,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:50:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash -432009471, now seen corresponding path program 2 times [2023-08-30 05:50:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:50:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107523119] [2023-08-30 05:50:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:50:57,761 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 05:50:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:50:57,762 INFO L229 MonitoredProcess]: Starting monitored process 33 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 05:50:57,763 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 (33)] Waiting until timeout for monitored process [2023-08-30 05:50:57,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:50:57,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:50:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:50:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:50:58,453 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-30 05:50:58,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-30 05:51:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:51:01,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:51:01,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:51:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107523119] [2023-08-30 05:51:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107523119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:51:01,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:51:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:51:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039013370] [2023-08-30 05:51:01,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:51:01,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:51:01,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:51:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:51:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-30 05:51:03,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:05,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:07,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:09,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:11,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:13,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:16,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:18,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:20,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:22,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:24,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:26,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:28,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:30,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:32,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:35,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:37,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:39,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:41,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:43,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:45,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:47,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:47,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-30 05:51:47,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 146 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:51:47,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:51:47,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-30 05:51:47,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:51:49,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:51,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:53,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:55,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:51:58,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:00,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:02,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:04,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:06,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:07,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:09,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:11,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:15,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:17,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:19,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:21,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:23,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:25,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:27,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:30,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:36,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:38,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:52:56,832 INFO L130 PetriNetUnfolder]: 57467/108687 cut-off events. [2023-08-30 05:52:56,832 INFO L131 PetriNetUnfolder]: For 208988/209164 co-relation queries the response was YES. [2023-08-30 05:52:58,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375377 conditions, 108687 events. 57467/108687 cut-off events. For 208988/209164 co-relation queries the response was YES. Maximal size of possible extension queue 1744. Compared 1105602 event pairs, 10428 based on Foata normal form. 176/105255 useless extension candidates. Maximal degree in co-relation 375281. Up to 24860 conditions per place. [2023-08-30 05:52:58,993 INFO L137 encePairwiseOnDemand]: 368/375 looper letters, 162 selfloop transitions, 18 changer transitions 40/248 dead transitions. [2023-08-30 05:52:58,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 248 transitions, 2269 flow [2023-08-30 05:52:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:52:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:52:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1381 transitions. [2023-08-30 05:52:58,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091851851851852 [2023-08-30 05:52:58,996 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1381 transitions. [2023-08-30 05:52:58,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1381 transitions. [2023-08-30 05:52:58,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:52:58,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1381 transitions. [2023-08-30 05:52:58,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.44444444444446) internal successors, (1381), 9 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states 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 05:52:59,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:52:59,000 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:52:59,001 INFO L175 Difference]: Start difference. First operand has 226 places, 146 transitions, 1290 flow. Second operand 9 states and 1381 transitions. [2023-08-30 05:52:59,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 248 transitions, 2269 flow [2023-08-30 05:53:05,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 248 transitions, 2199 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 05:53:05,473 INFO L231 Difference]: Finished difference. Result has 230 places, 146 transitions, 1301 flow [2023-08-30 05:53:05,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=230, PETRI_TRANSITIONS=146} [2023-08-30 05:53:05,474 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 162 predicate places. [2023-08-30 05:53:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 146 transitions, 1301 flow [2023-08-30 05:53:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 05:53:05,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:53:05,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:53:05,483 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 (33)] Forceful destruction successful, exit code 0 [2023-08-30 05:53:05,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:53:05,675 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:53:05,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:53:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 339295205, now seen corresponding path program 3 times [2023-08-30 05:53:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:53:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465015534] [2023-08-30 05:53:05,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:53:05,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:53:05,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:53:05,677 INFO L229 MonitoredProcess]: Starting monitored process 34 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 05:53:05,678 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 (34)] Waiting until timeout for monitored process [2023-08-30 05:53:05,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 05:53:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:53:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:53:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:53:06,266 INFO L321 Elim1Store]: treesize reduction 201, result has 20.6 percent of original size [2023-08-30 05:53:06,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 417 treesize of output 125 [2023-08-30 05:53:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 05:53:09,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:53:09,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:53:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465015534] [2023-08-30 05:53:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465015534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:53:09,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:53:09,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:53:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205262696] [2023-08-30 05:53:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:53:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:53:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:53:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:53:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2023-08-30 05:53:11,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:13,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:15,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:17,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:19,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:21,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:23,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:25,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:27,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:29,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:31,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:33,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:36,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:38,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:40,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:42,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:42,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 375 [2023-08-30 05:53:42,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 146 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:53:42,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:53:42,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 375 [2023-08-30 05:53:42,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:53:44,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:46,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:48,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:50,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:52,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:54,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:56,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:53:58,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:00,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:02,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:04,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:08,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:10,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:12,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:15,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:17,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:19,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:21,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:23,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 05:54:47,394 INFO L130 PetriNetUnfolder]: 66575/122327 cut-off events. [2023-08-30 05:54:47,394 INFO L131 PetriNetUnfolder]: For 299845/300021 co-relation queries the response was YES. [2023-08-30 05:54:49,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464611 conditions, 122327 events. 66575/122327 cut-off events. For 299845/300021 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 1215768 event pairs, 11792 based on Foata normal form. 176/118895 useless extension candidates. Maximal degree in co-relation 464513. Up to 49242 conditions per place. [2023-08-30 05:54:50,037 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 173 selfloop transitions, 30 changer transitions 21/252 dead transitions. [2023-08-30 05:54:50,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 252 transitions, 2336 flow [2023-08-30 05:54:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:54:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:54:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1381 transitions. [2023-08-30 05:54:50,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091851851851852 [2023-08-30 05:54:50,039 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1381 transitions. [2023-08-30 05:54:50,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1381 transitions. [2023-08-30 05:54:50,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:54:50,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1381 transitions. [2023-08-30 05:54:50,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.44444444444446) internal successors, (1381), 9 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states 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 05:54:50,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:54:50,043 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 05:54:50,043 INFO L175 Difference]: Start difference. First operand has 230 places, 146 transitions, 1301 flow. Second operand 9 states and 1381 transitions. [2023-08-30 05:54:50,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 252 transitions, 2336 flow [2023-08-30 05:54:58,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 252 transitions, 2263 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-08-30 05:54:58,214 INFO L231 Difference]: Finished difference. Result has 234 places, 158 transitions, 1411 flow [2023-08-30 05:54:58,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=234, PETRI_TRANSITIONS=158} [2023-08-30 05:54:58,215 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2023-08-30 05:54:58,215 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 158 transitions, 1411 flow [2023-08-30 05:54:58,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.5) internal successors, (1164), 8 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 05:54:58,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:54:58,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:54:58,224 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 (34)] Forceful destruction successful, exit code 0 [2023-08-30 05:54:58,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -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 05:54:58,421 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-08-30 05:54:58,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:54:58,421 INFO L85 PathProgramCache]: Analyzing trace with hash -105956229, now seen corresponding path program 4 times [2023-08-30 05:54:58,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:54:58,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771135899] [2023-08-30 05:54:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:54:58,422 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 05:54:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:54:58,422 INFO L229 MonitoredProcess]: Starting monitored process 35 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 05:54:58,423 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 (35)] Waiting until timeout for monitored process [2023-08-30 05:54:58,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:54:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:54:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:54:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15