./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:13:15,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:13:15,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:13:15,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:13:15,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:13:15,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:13:15,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:13:15,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:13:15,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:13:15,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:13:15,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:13:15,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:13:15,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:13:15,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:13:15,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:13:15,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:13:15,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:13:15,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:13:15,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:13:15,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:13:15,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:13:15,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:13:15,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:13:15,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:13:15,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:13:15,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:13:15,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:13:15,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:13:15,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:13:15,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:13:15,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:13:15,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:13:15,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:13:15,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:13:15,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:13:15,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:13:15,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:13:15,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:13:15,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:13:15,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:13:15,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:13:15,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:13:15,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:13:15,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:13:15,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:13:15,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:13:15,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:13:15,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:13:15,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:13:15,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:13:15,873 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:13:15,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:13:15,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:13:15,875 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:13:15,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:13:15,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:13:15,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:13:15,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:13:15,876 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:13:15,876 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:13:15,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:13:15,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:13:15,876 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:13:15,877 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:13:15,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:13:15,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:13:15,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:13:15,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:13:15,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:13:15,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:13:15,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:13:15,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:13:15,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:13:15,879 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:13:15,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:13:15,880 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:13:15,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:13:16,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:13:16,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:13:16,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:13:16,225 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:13:16,226 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:13:16,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-30 00:13:17,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:13:17,624 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:13:17,624 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-30 00:13:17,630 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a722f903c/6a56610c0464445bb964b065e0423716/FLAG63e63c65e [2023-08-30 00:13:17,642 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a722f903c/6a56610c0464445bb964b065e0423716 [2023-08-30 00:13:17,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:13:17,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:13:17,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:13:17,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:13:17,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:13:17,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:13:17" (1/1) ... [2023-08-30 00:13:17,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a05de1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:17, skipping insertion in model container [2023-08-30 00:13:17,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:13:17" (1/1) ... [2023-08-30 00:13:17,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:13:17,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:13:17,867 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-08-30 00:13:17,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:13:17,896 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:13:17,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38ff25bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:17, skipping insertion in model container [2023-08-30 00:13:17,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:13:17,899 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:13:17,900 INFO L158 Benchmark]: Toolchain (without parser) took 253.49ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 39.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:13:17,901 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 52.4MB. Free memory is still 30.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:13:17,902 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.50ms. Allocated memory is still 71.3MB. Free memory was 49.1MB in the beginning and 39.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:13:17,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 52.4MB. Free memory is still 30.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.50ms. Allocated memory is still 71.3MB. Free memory was 49.1MB in the beginning and 39.3MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:13:19,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:13:19,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:13:19,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:13:19,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:13:19,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:13:19,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:13:19,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:13:19,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:13:19,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:13:19,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:13:19,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:13:19,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:13:19,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:13:19,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:13:19,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:13:19,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:13:19,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:13:19,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:13:19,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:13:19,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:13:19,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:13:19,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:13:19,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:13:19,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:13:19,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:13:19,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:13:19,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:13:19,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:13:19,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:13:19,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:13:19,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:13:19,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:13:19,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:13:19,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:13:19,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:13:19,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:13:19,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:13:19,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:13:19,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:13:19,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:13:19,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:13:19,681 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:13:19,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:13:19,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:13:19,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:13:19,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:13:19,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:13:19,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:13:19,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:13:19,685 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:13:19,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:13:19,686 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:13:19,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:13:19,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:13:19,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:13:19,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:13:19,688 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:13:19,688 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:13:19,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:13:19,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:13:19,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:13:19,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:13:19,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:13:19,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:13:19,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:13:19,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:13:19,690 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:13:19,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:13:19,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:13:19,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:13:19,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:13:19,691 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:13:19,691 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:13:19,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:13:19,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:13:20,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:13:20,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:13:20,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:13:20,006 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:13:20,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-30 00:13:21,158 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:13:21,336 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:13:21,336 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-08-30 00:13:21,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1494d61c/325457ad45d94e79ba08efcd7b235780/FLAG87c4c8507 [2023-08-30 00:13:21,367 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1494d61c/325457ad45d94e79ba08efcd7b235780 [2023-08-30 00:13:21,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:13:21,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:13:21,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:13:21,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:13:21,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:13:21,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b90843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21, skipping insertion in model container [2023-08-30 00:13:21,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:13:21,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:13:21,604 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-08-30 00:13:21,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:13:21,638 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:13:21,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:13:21,673 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-08-30 00:13:21,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:13:21,688 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:13:21,725 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-08-30 00:13:21,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:13:21,741 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:13:21,741 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:13:21,746 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:13:21,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21 WrapperNode [2023-08-30 00:13:21,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:13:21,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:13:21,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:13:21,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:13:21,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,792 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2023-08-30 00:13:21,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:13:21,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:13:21,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:13:21,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:13:21,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:13:21,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:13:21,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:13:21,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:13:21,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (1/1) ... [2023-08-30 00:13:21,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:13:21,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:13:21,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:13:21,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:13:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:13:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:13:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:13:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:13:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:13:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:13:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:13:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:13:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:13:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:13:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 00:13:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 00:13:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:13:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:13:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:13:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:13:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:13:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:13:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:13:21,909 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:13:22,065 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:13:22,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:13:22,555 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:13:22,671 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:13:22,671 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:13:22,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:13:22 BoogieIcfgContainer [2023-08-30 00:13:22,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:13:22,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:13:22,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:13:22,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:13:22,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:13:21" (1/3) ... [2023-08-30 00:13:22,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11faa736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:13:22, skipping insertion in model container [2023-08-30 00:13:22,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:13:21" (2/3) ... [2023-08-30 00:13:22,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11faa736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:13:22, skipping insertion in model container [2023-08-30 00:13:22,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:13:22" (3/3) ... [2023-08-30 00:13:22,681 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-08-30 00:13:22,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:13:22,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 00:13:22,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:13:22,788 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 00:13:22,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 00:13:22,914 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2023-08-30 00:13:22,914 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:13:22,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 196 events. 12/196 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 00:13:22,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 200 transitions, 432 flow [2023-08-30 00:13:22,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 192 transitions, 408 flow [2023-08-30 00:13:22,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:13:22,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 00:13:22,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 192 transitions, 408 flow [2023-08-30 00:13:22,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 192 transitions, 408 flow [2023-08-30 00:13:23,015 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2023-08-30 00:13:23,015 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 00:13:23,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 12/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-30 00:13:23,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2023-08-30 00:13:40,649 INFO L134 LiptonReduction]: Checked pairs total: 8115 [2023-08-30 00:13:40,649 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-30 00:13:40,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:13:40,674 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;@36bef435, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:13:40,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-30 00:13:40,680 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:13:40,680 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:13:40,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:40,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:13:40,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:40,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:40,686 INFO L85 PathProgramCache]: Analyzing trace with hash 26204, now seen corresponding path program 1 times [2023-08-30 00:13:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261176745] [2023-08-30 00:13:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:40,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:40,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:40,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:13:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:13:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:41,206 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:13:41,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:13:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:41,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:41,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:41,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261176745] [2023-08-30 00:13:41,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261176745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:41,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:41,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818740962] [2023-08-30 00:13:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:41,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:41,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:41,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 384 [2023-08-30 00:13:41,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:41,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:41,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 384 [2023-08-30 00:13:41,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:44,381 INFO L130 PetriNetUnfolder]: 18239/23498 cut-off events. [2023-08-30 00:13:44,382 INFO L131 PetriNetUnfolder]: For 408/408 co-relation queries the response was YES. [2023-08-30 00:13:44,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47992 conditions, 23498 events. 18239/23498 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 122413 event pairs, 12836 based on Foata normal form. 0/10355 useless extension candidates. Maximal degree in co-relation 21660. Up to 11727 conditions per place. [2023-08-30 00:13:44,546 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 104 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-30 00:13:44,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 482 flow [2023-08-30 00:13:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 00:13:44,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-08-30 00:13:44,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 00:13:44,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 00:13:44,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:44,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 00:13:44,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:44,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:44,586 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 620 transitions. [2023-08-30 00:13:44,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 482 flow [2023-08-30 00:13:44,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 450 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 00:13:44,639 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 138 flow [2023-08-30 00:13:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-30 00:13:44,644 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 00:13:44,645 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 138 flow [2023-08-30 00:13:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:44,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:44,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:13:44,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:44,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:44,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:44,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 26255, now seen corresponding path program 1 times [2023-08-30 00:13:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:44,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339719648] [2023-08-30 00:13:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:44,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:44,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:44,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:13:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:13:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:44,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:44,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339719648] [2023-08-30 00:13:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339719648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:44,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:44,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473959459] [2023-08-30 00:13:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:44,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2023-08-30 00:13:45,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:45,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:45,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2023-08-30 00:13:45,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:46,019 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2023-08-30 00:13:46,020 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:13:46,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 11752 events. 9120/11752 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56085 event pairs, 6418 based on Foata normal form. 0/5172 useless extension candidates. Maximal degree in co-relation 23699. Up to 11727 conditions per place. [2023-08-30 00:13:46,075 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 00:13:46,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 252 flow [2023-08-30 00:13:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-30 00:13:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835069444444444 [2023-08-30 00:13:46,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-30 00:13:46,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-30 00:13:46,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:46,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-30 00:13:46,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,085 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 557 transitions. [2023-08-30 00:13:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 252 flow [2023-08-30 00:13:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:46,088 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 148 flow [2023-08-30 00:13:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 00:13:46,089 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 00:13:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 148 flow [2023-08-30 00:13:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:46,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:13:46,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:46,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:46,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 26202, now seen corresponding path program 1 times [2023-08-30 00:13:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644189670] [2023-08-30 00:13:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:46,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:46,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:13:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:13:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:46,506 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:13:46,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:13:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:46,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:46,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644189670] [2023-08-30 00:13:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644189670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:46,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:46,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278155551] [2023-08-30 00:13:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:46,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:13:46,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:46,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:46,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:13:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:47,620 INFO L130 PetriNetUnfolder]: 9120/11750 cut-off events. [2023-08-30 00:13:47,620 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:13:47,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23714 conditions, 11750 events. 9120/11750 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 56221 event pairs, 6418 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 23700. Up to 11726 conditions per place. [2023-08-30 00:13:47,695 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:13:47,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 254 flow [2023-08-30 00:13:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-30 00:13:47,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-30 00:13:47,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-30 00:13:47,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-30 00:13:47,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:47,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-30 00:13:47,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:47,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:47,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:47,703 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 148 flow. Second operand 3 states and 540 transitions. [2023-08-30 00:13:47,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 254 flow [2023-08-30 00:13:47,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 248 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:13:47,705 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 142 flow [2023-08-30 00:13:47,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-30 00:13:47,706 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -13 predicate places. [2023-08-30 00:13:47,706 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 142 flow [2023-08-30 00:13:47,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:47,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:47,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:13:47,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:47,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:47,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 814740, now seen corresponding path program 1 times [2023-08-30 00:13:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:47,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281676398] [2023-08-30 00:13:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:47,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:13:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:48,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:13:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:48,139 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-08-30 00:13:48,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-08-30 00:13:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:48,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:48,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281676398] [2023-08-30 00:13:48,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281676398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:48,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:48,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072097806] [2023-08-30 00:13:48,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:48,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:48,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:13:48,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:48,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:48,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:13:48,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:49,255 INFO L130 PetriNetUnfolder]: 7644/9913 cut-off events. [2023-08-30 00:13:49,255 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:13:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 9913 events. 7644/9913 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 46761 event pairs, 5350 based on Foata normal form. 0/4487 useless extension candidates. Maximal degree in co-relation 20028. Up to 9889 conditions per place. [2023-08-30 00:13:49,297 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 51 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 00:13:49,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 240 flow [2023-08-30 00:13:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-30 00:13:49,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678819444444444 [2023-08-30 00:13:49,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-30 00:13:49,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-30 00:13:49,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:49,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-30 00:13:49,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:49,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:49,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:49,304 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 142 flow. Second operand 3 states and 539 transitions. [2023-08-30 00:13:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 240 flow [2023-08-30 00:13:49,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:49,306 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 137 flow [2023-08-30 00:13:49,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-30 00:13:49,307 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2023-08-30 00:13:49,307 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 137 flow [2023-08-30 00:13:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:49,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:49,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:13:49,319 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 00:13:49,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:49,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:49,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 814739, now seen corresponding path program 1 times [2023-08-30 00:13:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907597669] [2023-08-30 00:13:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:49,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:49,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:49,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:13:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:13:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:49,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:49,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:49,836 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 00:13:49,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 00:13:49,877 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-30 00:13:49,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 88 [2023-08-30 00:13:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:49,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:49,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907597669] [2023-08-30 00:13:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907597669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:49,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634167620] [2023-08-30 00:13:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2023-08-30 00:13:50,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:50,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:50,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2023-08-30 00:13:50,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:50,650 INFO L130 PetriNetUnfolder]: 6168/8076 cut-off events. [2023-08-30 00:13:50,650 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:13:50,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 8076 events. 6168/8076 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 37791 event pairs, 4282 based on Foata normal form. 0/3803 useless extension candidates. Maximal degree in co-relation 16353. Up to 8052 conditions per place. [2023-08-30 00:13:50,682 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 49 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:13:50,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 231 flow [2023-08-30 00:13:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-30 00:13:50,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713541666666667 [2023-08-30 00:13:50,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-30 00:13:50,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-30 00:13:50,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:50,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-30 00:13:50,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:50,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:50,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:50,689 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 137 flow. Second operand 3 states and 543 transitions. [2023-08-30 00:13:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 231 flow [2023-08-30 00:13:50,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:50,691 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-08-30 00:13:50,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-30 00:13:50,692 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -15 predicate places. [2023-08-30 00:13:50,692 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-08-30 00:13:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:50,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:50,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:13:50,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:13:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:50,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:50,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 814689, now seen corresponding path program 1 times [2023-08-30 00:13:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:50,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067793167] [2023-08-30 00:13:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:50,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:50,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:50,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 00:13:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:13:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:51,106 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:13:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:13:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:51,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067793167] [2023-08-30 00:13:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067793167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:51,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:51,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:13:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389162485] [2023-08-30 00:13:51,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:13:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:13:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:13:52,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 00:13:52,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:52,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:52,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 00:13:52,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:53,466 INFO L130 PetriNetUnfolder]: 12337/16153 cut-off events. [2023-08-30 00:13:53,466 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 00:13:53,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32723 conditions, 16153 events. 12337/16153 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 82373 event pairs, 8564 based on Foata normal form. 0/7626 useless extension candidates. Maximal degree in co-relation 32712. Up to 8051 conditions per place. [2023-08-30 00:13:53,538 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 94 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2023-08-30 00:13:53,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 456 flow [2023-08-30 00:13:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:13:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:13:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1046 transitions. [2023-08-30 00:13:53,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539930555555556 [2023-08-30 00:13:53,542 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1046 transitions. [2023-08-30 00:13:53,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1046 transitions. [2023-08-30 00:13:53,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:53,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1046 transitions. [2023-08-30 00:13:53,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.33333333333334) internal successors, (1046), 6 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:53,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:53,549 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:53,550 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 6 states and 1046 transitions. [2023-08-30 00:13:53,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 456 flow [2023-08-30 00:13:53,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:53,552 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 189 flow [2023-08-30 00:13:53,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-08-30 00:13:53,553 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 00:13:53,553 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 189 flow [2023-08-30 00:13:53,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:53,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:53,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:53,565 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 (7)] Ended with exit code 0 [2023-08-30 00:13:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:53,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:53,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 782982615, now seen corresponding path program 1 times [2023-08-30 00:13:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594902009] [2023-08-30 00:13:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:53,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:53,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:53,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:13:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:53,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:13:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:53,964 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-08-30 00:13:53,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2023-08-30 00:13:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:54,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:54,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:54,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594902009] [2023-08-30 00:13:54,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594902009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:54,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:54,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:13:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256032228] [2023-08-30 00:13:54,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:13:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:13:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:13:54,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:13:54,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:54,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:54,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:13:54,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:55,280 INFO L130 PetriNetUnfolder]: 11953/15637 cut-off events. [2023-08-30 00:13:55,281 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 00:13:55,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31715 conditions, 15637 events. 11953/15637 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 79777 event pairs, 8298 based on Foata normal form. 0/7435 useless extension candidates. Maximal degree in co-relation 31699. Up to 15589 conditions per place. [2023-08-30 00:13:55,350 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 00:13:55,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 291 flow [2023-08-30 00:13:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:13:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:13:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 00:13:55,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644097222222222 [2023-08-30 00:13:55,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 00:13:55,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 00:13:55,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:55,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 00:13:55,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:55,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:55,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:55,357 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 189 flow. Second operand 3 states and 535 transitions. [2023-08-30 00:13:55,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 291 flow [2023-08-30 00:13:55,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 58 transitions, 277 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:55,359 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 173 flow [2023-08-30 00:13:55,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 00:13:55,360 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2023-08-30 00:13:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 173 flow [2023-08-30 00:13:55,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:55,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:55,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:55,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-30 00:13:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:55,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:55,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash 782982613, now seen corresponding path program 1 times [2023-08-30 00:13:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119236058] [2023-08-30 00:13:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:55,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:55,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:13:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:13:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:13:55,777 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2023-08-30 00:13:55,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2023-08-30 00:13:55,795 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:13:55,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-30 00:13:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:56,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:13:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:13:56,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119236058] [2023-08-30 00:13:56,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119236058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:13:56,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:13:56,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:13:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450493059] [2023-08-30 00:13:56,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:13:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:13:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:13:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:13:57,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:13:57,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:57,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:57,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:13:57,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:13:58,731 INFO L130 PetriNetUnfolder]: 11569/15121 cut-off events. [2023-08-30 00:13:58,732 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-30 00:13:58,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 15121 events. 11569/15121 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 76800 event pairs, 8032 based on Foata normal form. 0/7279 useless extension candidates. Maximal degree in co-relation 30661. Up to 7539 conditions per place. [2023-08-30 00:13:58,808 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 90 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-30 00:13:58,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 453 flow [2023-08-30 00:13:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:13:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:13:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 858 transitions. [2023-08-30 00:13:58,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2023-08-30 00:13:58,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 858 transitions. [2023-08-30 00:13:58,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 858 transitions. [2023-08-30 00:13:58,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:13:58,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 858 transitions. [2023-08-30 00:13:58,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:58,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:58,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:58,816 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 173 flow. Second operand 5 states and 858 transitions. [2023-08-30 00:13:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 453 flow [2023-08-30 00:13:58,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:13:58,819 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 174 flow [2023-08-30 00:13:58,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-30 00:13:58,819 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2023-08-30 00:13:58,820 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 174 flow [2023-08-30 00:13:58,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.25) internal successors, (1234), 8 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:58,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:13:58,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:13:58,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-08-30 00:13:59,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:59,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:13:59,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:13:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 782982390, now seen corresponding path program 1 times [2023-08-30 00:13:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:13:59,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134880327] [2023-08-30 00:13:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:13:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:13:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:13:59,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:13:59,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:13:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:13:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:13:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:13:59,179 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-30 00:13:59,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-30 00:13:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:13:59,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:13:59,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:13:59,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134880327] [2023-08-30 00:13:59,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134880327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:13:59,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:13:59,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:13:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869156497] [2023-08-30 00:13:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:13:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:13:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:13:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:13:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:13:59,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2023-08-30 00:13:59,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:13:59,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:13:59,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2023-08-30 00:13:59,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:00,105 INFO L130 PetriNetUnfolder]: 6411/8489 cut-off events. [2023-08-30 00:14:00,105 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 00:14:00,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 8489 events. 6411/8489 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 40190 event pairs, 4360 based on Foata normal form. 0/4745 useless extension candidates. Maximal degree in co-relation 17227. Up to 8446 conditions per place. [2023-08-30 00:14:00,161 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-30 00:14:00,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 51 transitions, 260 flow [2023-08-30 00:14:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:14:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:14:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-08-30 00:14:00,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342447916666667 [2023-08-30 00:14:00,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-08-30 00:14:00,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-08-30 00:14:00,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:00,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-08-30 00:14:00,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,169 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 174 flow. Second operand 4 states and 667 transitions. [2023-08-30 00:14:00,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 51 transitions, 260 flow [2023-08-30 00:14:00,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:14:00,171 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 167 flow [2023-08-30 00:14:00,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-30 00:14:00,172 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2023-08-30 00:14:00,172 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 167 flow [2023-08-30 00:14:00,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:00,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:00,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:14:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:00,381 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:00,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 782982391, now seen corresponding path program 1 times [2023-08-30 00:14:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:00,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52661107] [2023-08-30 00:14:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:00,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:00,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:14:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:14:00,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:00,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:00,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:14:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:00,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:00,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52661107] [2023-08-30 00:14:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52661107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:00,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:14:00,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:14:00,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21443930] [2023-08-30 00:14:00,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:14:00,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:14:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:14:01,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 384 [2023-08-30 00:14:01,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:01,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:01,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 384 [2023-08-30 00:14:01,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:02,112 INFO L130 PetriNetUnfolder]: 6411/8483 cut-off events. [2023-08-30 00:14:02,112 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 00:14:02,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17242 conditions, 8483 events. 6411/8483 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39916 event pairs, 4360 based on Foata normal form. 0/4749 useless extension candidates. Maximal degree in co-relation 17224. Up to 4224 conditions per place. [2023-08-30 00:14:02,138 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-08-30 00:14:02,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 431 flow [2023-08-30 00:14:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:14:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:14:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1179 transitions. [2023-08-30 00:14:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-08-30 00:14:02,142 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1179 transitions. [2023-08-30 00:14:02,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1179 transitions. [2023-08-30 00:14:02,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:02,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1179 transitions. [2023-08-30 00:14:02,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.42857142857142) internal successors, (1179), 7 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:02,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:02,149 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:02,150 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 167 flow. Second operand 7 states and 1179 transitions. [2023-08-30 00:14:02,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 431 flow [2023-08-30 00:14:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:14:02,152 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 181 flow [2023-08-30 00:14:02,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 00:14:02,153 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2023-08-30 00:14:02,153 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 181 flow [2023-08-30 00:14:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:02,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:02,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:14:02,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:02,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:02,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1497055332, now seen corresponding path program 2 times [2023-08-30 00:14:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456198251] [2023-08-30 00:14:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:14:02,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:02,365 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:14:02,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:14:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:14:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:14:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:02,584 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:14:02,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:14:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:02,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:03,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:03,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456198251] [2023-08-30 00:14:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456198251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:03,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:14:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:14:03,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430460335] [2023-08-30 00:14:03,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:03,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:14:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:14:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:14:06,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 384 [2023-08-30 00:14:06,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:06,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:06,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 384 [2023-08-30 00:14:06,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:11,614 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2023-08-30 00:14:11,614 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2023-08-30 00:14:11,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77424 conditions, 38147 events. 28838/38147 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 212443 event pairs, 19620 based on Foata normal form. 6/21385 useless extension candidates. Maximal degree in co-relation 77406. Up to 4224 conditions per place. [2023-08-30 00:14:11,841 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 353 selfloop transitions, 12 changer transitions 0/366 dead transitions. [2023-08-30 00:14:11,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 366 transitions, 1673 flow [2023-08-30 00:14:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:14:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:14:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2267 transitions. [2023-08-30 00:14:11,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919704861111111 [2023-08-30 00:14:11,848 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2267 transitions. [2023-08-30 00:14:11,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2267 transitions. [2023-08-30 00:14:11,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:11,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2267 transitions. [2023-08-30 00:14:11,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.91666666666666) internal successors, (2267), 12 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:11,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:11,860 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 384.0) internal successors, (4992), 13 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:11,860 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 181 flow. Second operand 12 states and 2267 transitions. [2023-08-30 00:14:11,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 366 transitions, 1673 flow [2023-08-30 00:14:11,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 366 transitions, 1656 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:14:11,866 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 265 flow [2023-08-30 00:14:11,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 00:14:11,866 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 00:14:11,866 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 265 flow [2023-08-30 00:14:11,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:11,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:11,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:11,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:12,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:12,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:12,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash 827034521, now seen corresponding path program 1 times [2023-08-30 00:14:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:12,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607394931] [2023-08-30 00:14:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:12,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:12,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:14:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:14:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:12,252 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 00:14:12,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 51 [2023-08-30 00:14:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:12,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:12,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607394931] [2023-08-30 00:14:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607394931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:12,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:14:12,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077967756] [2023-08-30 00:14:12,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:14:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:14:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:14:12,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2023-08-30 00:14:12,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:12,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:12,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2023-08-30 00:14:12,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:15,070 INFO L130 PetriNetUnfolder]: 28244/37256 cut-off events. [2023-08-30 00:14:15,070 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 00:14:15,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75672 conditions, 37256 events. 28244/37256 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 209014 event pairs, 19170 based on Foata normal form. 0/20957 useless extension candidates. Maximal degree in co-relation 75648. Up to 37121 conditions per place. [2023-08-30 00:14:15,277 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 53 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:14:15,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 55 transitions, 369 flow [2023-08-30 00:14:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:14:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:14:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 00:14:15,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-30 00:14:15,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 00:14:15,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 00:14:15,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:15,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 00:14:15,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:15,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:15,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:15,283 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 265 flow. Second operand 3 states and 528 transitions. [2023-08-30 00:14:15,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 55 transitions, 369 flow [2023-08-30 00:14:15,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 55 transitions, 344 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 00:14:15,286 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 238 flow [2023-08-30 00:14:15,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2023-08-30 00:14:15,286 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-30 00:14:15,286 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 238 flow [2023-08-30 00:14:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:15,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:15,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:15,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:15,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:15,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 827034520, now seen corresponding path program 1 times [2023-08-30 00:14:15,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:15,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289132756] [2023-08-30 00:14:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:15,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:15,498 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:15,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:14:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:14:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:14:15,755 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2023-08-30 00:14:15,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2023-08-30 00:14:15,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-30 00:14:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:15,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:16,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:16,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289132756] [2023-08-30 00:14:16,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289132756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:16,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:14:16,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:14:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966007710] [2023-08-30 00:14:16,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:16,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:14:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:14:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:14:16,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:14:16,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:16,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:16,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:14:16,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:19,173 INFO L130 PetriNetUnfolder]: 27650/36365 cut-off events. [2023-08-30 00:14:19,174 INFO L131 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2023-08-30 00:14:19,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73873 conditions, 36365 events. 27650/36365 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 203063 event pairs, 18720 based on Foata normal form. 0/20695 useless extension candidates. Maximal degree in co-relation 73848. Up to 32204 conditions per place. [2023-08-30 00:14:19,460 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 83 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-30 00:14:19,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 482 flow [2023-08-30 00:14:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:14:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:14:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 844 transitions. [2023-08-30 00:14:19,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-08-30 00:14:19,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 844 transitions. [2023-08-30 00:14:19,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 844 transitions. [2023-08-30 00:14:19,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:19,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 844 transitions. [2023-08-30 00:14:19,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:19,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:19,468 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:19,468 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 238 flow. Second operand 5 states and 844 transitions. [2023-08-30 00:14:19,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 482 flow [2023-08-30 00:14:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:14:19,471 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 239 flow [2023-08-30 00:14:19,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-30 00:14:19,471 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-30 00:14:19,471 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 239 flow [2023-08-30 00:14:19,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:19,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:19,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:19,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:19,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:19,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 826824309, now seen corresponding path program 1 times [2023-08-30 00:14:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:19,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520488567] [2023-08-30 00:14:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:19,682 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 00:14:19,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:19,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:19,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:14:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:14:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:19,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:19,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520488567] [2023-08-30 00:14:19,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520488567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:19,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:19,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:14:19,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693829760] [2023-08-30 00:14:19,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:14:19,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:14:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:14:20,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 00:14:20,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:20,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:20,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 00:14:20,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:23,563 INFO L130 PetriNetUnfolder]: 41933/54851 cut-off events. [2023-08-30 00:14:23,564 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 00:14:23,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111460 conditions, 54851 events. 41933/54851 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 329691 event pairs, 6201 based on Foata normal form. 0/30902 useless extension candidates. Maximal degree in co-relation 111434. Up to 37404 conditions per place. [2023-08-30 00:14:24,003 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 91 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2023-08-30 00:14:24,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 533 flow [2023-08-30 00:14:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:14:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:14:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 884 transitions. [2023-08-30 00:14:24,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46041666666666664 [2023-08-30 00:14:24,006 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 884 transitions. [2023-08-30 00:14:24,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 884 transitions. [2023-08-30 00:14:24,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:24,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 884 transitions. [2023-08-30 00:14:24,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:24,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:24,011 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:24,011 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 239 flow. Second operand 5 states and 884 transitions. [2023-08-30 00:14:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 533 flow [2023-08-30 00:14:24,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:14:24,014 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 270 flow [2023-08-30 00:14:24,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-08-30 00:14:24,015 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2023-08-30 00:14:24,015 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 270 flow [2023-08-30 00:14:24,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.16666666666666) internal successors, (967), 6 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:24,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:24,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:24,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:24,225 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:24,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash -138246400, now seen corresponding path program 1 times [2023-08-30 00:14:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162041863] [2023-08-30 00:14:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:24,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:24,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:24,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:24,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:14:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:14:24,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:24,474 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:14:24,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:14:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:24,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:24,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:24,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162041863] [2023-08-30 00:14:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162041863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:24,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:14:24,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:14:24,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771008988] [2023-08-30 00:14:24,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:24,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:14:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:14:24,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:14:26,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:14:26,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 270 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:26,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:26,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:14:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:34,576 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2023-08-30 00:14:34,576 INFO L131 PetriNetUnfolder]: For 18379/18379 co-relation queries the response was YES. [2023-08-30 00:14:34,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183776 conditions, 77693 events. 60131/77693 cut-off events. For 18379/18379 co-relation queries the response was YES. Maximal size of possible extension queue 2990. Compared 465090 event pairs, 11511 based on Foata normal form. 1548/59414 useless extension candidates. Maximal degree in co-relation 183748. Up to 26965 conditions per place. [2023-08-30 00:14:35,135 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2023-08-30 00:14:35,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 772 flow [2023-08-30 00:14:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:14:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:14:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1355 transitions. [2023-08-30 00:14:35,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410807291666667 [2023-08-30 00:14:35,139 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1355 transitions. [2023-08-30 00:14:35,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1355 transitions. [2023-08-30 00:14:35,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:35,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1355 transitions. [2023-08-30 00:14:35,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.375) internal successors, (1355), 8 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:35,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:35,146 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:35,146 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 270 flow. Second operand 8 states and 1355 transitions. [2023-08-30 00:14:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 772 flow [2023-08-30 00:14:35,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 764 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:14:35,161 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 337 flow [2023-08-30 00:14:35,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-08-30 00:14:35,162 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-08-30 00:14:35,162 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 337 flow [2023-08-30 00:14:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:35,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:35,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:35,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:14:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:35,372 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:35,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash 211056040, now seen corresponding path program 1 times [2023-08-30 00:14:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305833213] [2023-08-30 00:14:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:35,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:14:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:14:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:35,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:35,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:35,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305833213] [2023-08-30 00:14:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305833213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:35,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:35,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:14:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543132971] [2023-08-30 00:14:35,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:35,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:14:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:14:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:14:35,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 384 [2023-08-30 00:14:35,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:35,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:35,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 384 [2023-08-30 00:14:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:45,254 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2023-08-30 00:14:45,254 INFO L131 PetriNetUnfolder]: For 109206/109260 co-relation queries the response was YES. [2023-08-30 00:14:45,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305247 conditions, 109949 events. 85223/109949 cut-off events. For 109206/109260 co-relation queries the response was YES. Maximal size of possible extension queue 4092. Compared 657474 event pairs, 22545 based on Foata normal form. 18/83309 useless extension candidates. Maximal degree in co-relation 305213. Up to 77868 conditions per place. [2023-08-30 00:14:46,274 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2023-08-30 00:14:46,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 710 flow [2023-08-30 00:14:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:14:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:14:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-08-30 00:14:46,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2023-08-30 00:14:46,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-08-30 00:14:46,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-08-30 00:14:46,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:46,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-08-30 00:14:46,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:46,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:46,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:46,281 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 337 flow. Second operand 5 states and 882 transitions. [2023-08-30 00:14:46,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 710 flow [2023-08-30 00:14:46,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 683 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 00:14:46,481 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 340 flow [2023-08-30 00:14:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2023-08-30 00:14:46,482 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-08-30 00:14:46,482 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 340 flow [2023-08-30 00:14:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:46,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:46,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:46,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-08-30 00:14:46,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:46,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:46,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:46,692 INFO L85 PathProgramCache]: Analyzing trace with hash 211245344, now seen corresponding path program 1 times [2023-08-30 00:14:46,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:46,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971521486] [2023-08-30 00:14:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:46,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:46,694 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:46,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:14:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:14:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:46,932 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:14:46,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:14:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:14:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:14:47,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971521486] [2023-08-30 00:14:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971521486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:14:47,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:14:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:14:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156581982] [2023-08-30 00:14:47,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:14:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:14:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:14:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:14:47,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:14:47,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:47,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:47,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:14:47,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:14:56,510 INFO L130 PetriNetUnfolder]: 75431/97547 cut-off events. [2023-08-30 00:14:56,510 INFO L131 PetriNetUnfolder]: For 102564/102564 co-relation queries the response was YES. [2023-08-30 00:14:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276511 conditions, 97547 events. 75431/97547 cut-off events. For 102564/102564 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 575079 event pairs, 49806 based on Foata normal form. 0/81815 useless extension candidates. Maximal degree in co-relation 276476. Up to 86644 conditions per place. [2023-08-30 00:14:57,536 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 99 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-08-30 00:14:57,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 704 flow [2023-08-30 00:14:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:14:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:14:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-08-30 00:14:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-30 00:14:57,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-08-30 00:14:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-08-30 00:14:57,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:14:57,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-08-30 00:14:57,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:57,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:57,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 384.0) internal successors, (2304), 6 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:57,542 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 340 flow. Second operand 5 states and 840 transitions. [2023-08-30 00:14:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 704 flow [2023-08-30 00:14:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 103 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:14:57,680 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 332 flow [2023-08-30 00:14:57,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2023-08-30 00:14:57,680 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-08-30 00:14:57,680 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 332 flow [2023-08-30 00:14:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.25) internal successors, (1242), 8 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:14:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:14:57,698 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 00:14:57,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:57,891 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:14:57,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:14:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 211245343, now seen corresponding path program 1 times [2023-08-30 00:14:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:14:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995610286] [2023-08-30 00:14:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:14:57,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:14:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:14:57,893 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:14:57,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:14:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:14:58,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:14:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:14:58,098 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-08-30 00:14:58,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2023-08-30 00:14:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:14:58,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:14:58,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:14:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995610286] [2023-08-30 00:14:58,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995610286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:14:58,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:14:58,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:14:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893991866] [2023-08-30 00:14:58,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:14:58,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:14:58,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:14:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:14:58,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:14:58,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2023-08-30 00:14:58,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:14:58,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:14:58,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2023-08-30 00:14:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:15:05,517 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2023-08-30 00:15:05,517 INFO L131 PetriNetUnfolder]: For 84618/84618 co-relation queries the response was YES. [2023-08-30 00:15:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238848 conditions, 85379 events. 65873/85379 cut-off events. For 84618/84618 co-relation queries the response was YES. Maximal size of possible extension queue 3101. Compared 497942 event pairs, 43587 based on Foata normal form. 0/73742 useless extension candidates. Maximal degree in co-relation 238813. Up to 85271 conditions per place. [2023-08-30 00:15:06,424 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:15:06,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 59 transitions, 444 flow [2023-08-30 00:15:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:15:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:15:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 00:15:06,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2023-08-30 00:15:06,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 00:15:06,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 00:15:06,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:15:06,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 00:15:06,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:06,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:06,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:06,428 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 332 flow. Second operand 3 states and 513 transitions. [2023-08-30 00:15:06,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 59 transitions, 444 flow [2023-08-30 00:15:06,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 59 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:15:06,528 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 325 flow [2023-08-30 00:15:06,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2023-08-30 00:15:06,529 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2023-08-30 00:15:06,529 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 325 flow [2023-08-30 00:15:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:15:06,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:15:06,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:15:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:06,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:15:06,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:15:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2047193718, now seen corresponding path program 1 times [2023-08-30 00:15:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:15:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283915123] [2023-08-30 00:15:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:15:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:15:06,741 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:15:06,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:15:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:15:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:15:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:15:06,961 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:15:06,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:15:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:15:07,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:15:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:15:07,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:15:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283915123] [2023-08-30 00:15:07,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283915123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:15:07,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:15:07,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:15:07,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103088277] [2023-08-30 00:15:07,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:15:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:15:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:15:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:15:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:15:09,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:15:09,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:09,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:15:09,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:15:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:15:21,566 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2023-08-30 00:15:21,566 INFO L131 PetriNetUnfolder]: For 124047/124047 co-relation queries the response was YES. [2023-08-30 00:15:22,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351689 conditions, 126239 events. 98849/126239 cut-off events. For 124047/124047 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 762910 event pairs, 23391 based on Foata normal form. 2628/113738 useless extension candidates. Maximal degree in co-relation 351654. Up to 47638 conditions per place. [2023-08-30 00:15:22,782 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2023-08-30 00:15:22,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1054 flow [2023-08-30 00:15:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:15:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:15:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-08-30 00:15:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358723958333333 [2023-08-30 00:15:22,785 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-08-30 00:15:22,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-08-30 00:15:22,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:15:22,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-08-30 00:15:22,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:22,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:22,790 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:22,790 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 325 flow. Second operand 8 states and 1339 transitions. [2023-08-30 00:15:22,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1054 flow [2023-08-30 00:15:22,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1051 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:15:22,913 INFO L231 Difference]: Finished difference. Result has 100 places, 64 transitions, 397 flow [2023-08-30 00:15:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=100, PETRI_TRANSITIONS=64} [2023-08-30 00:15:22,914 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 23 predicate places. [2023-08-30 00:15:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 64 transitions, 397 flow [2023-08-30 00:15:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:22,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:15:22,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:15:22,922 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 00:15:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:23,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:15:23,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:15:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2041334241, now seen corresponding path program 1 times [2023-08-30 00:15:23,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:15:23,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451657009] [2023-08-30 00:15:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:15:23,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:15:23,118 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:15:23,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:15:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:15:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:15:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:15:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:23,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:15:23,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 00:15:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:15:23,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:15:23,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451657009] [2023-08-30 00:15:23,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451657009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:15:23,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:15:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:15:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705061059] [2023-08-30 00:15:23,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:15:23,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:15:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:15:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:15:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:15:25,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:15:25,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 64 transitions, 397 flow. Second operand has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:25,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:15:25,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:15:25,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:15:41,546 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2023-08-30 00:15:41,546 INFO L131 PetriNetUnfolder]: For 340489/340489 co-relation queries the response was YES. [2023-08-30 00:15:42,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563520 conditions, 167828 events. 127811/167828 cut-off events. For 340489/340489 co-relation queries the response was YES. Maximal size of possible extension queue 3515. Compared 999134 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563479. Up to 101297 conditions per place. [2023-08-30 00:15:43,185 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2023-08-30 00:15:43,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1357 flow [2023-08-30 00:15:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:15:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:15:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1496 transitions. [2023-08-30 00:15:43,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2023-08-30 00:15:43,189 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1496 transitions. [2023-08-30 00:15:43,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1496 transitions. [2023-08-30 00:15:43,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:15:43,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1496 transitions. [2023-08-30 00:15:43,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.22222222222223) internal successors, (1496), 9 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:43,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:43,195 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:43,195 INFO L175 Difference]: Start difference. First operand has 100 places, 64 transitions, 397 flow. Second operand 9 states and 1496 transitions. [2023-08-30 00:15:43,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1357 flow [2023-08-30 00:15:43,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1310 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-30 00:15:43,802 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 436 flow [2023-08-30 00:15:43,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-08-30 00:15:43,802 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2023-08-30 00:15:43,802 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 436 flow [2023-08-30 00:15:43,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.0) internal successors, (1550), 10 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:43,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:15:43,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:15:43,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:15:44,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:44,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:15:44,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:15:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1143151987, now seen corresponding path program 1 times [2023-08-30 00:15:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:15:44,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235092883] [2023-08-30 00:15:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:15:44,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:15:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:15:44,005 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:15:44,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:15:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:15:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:15:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:15:44,238 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:15:44,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:15:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:15:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:15:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:15:44,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:15:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235092883] [2023-08-30 00:15:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235092883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:15:44,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:15:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:15:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415386984] [2023-08-30 00:15:44,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:15:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:15:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:15:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:15:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:15:46,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2023-08-30 00:15:46,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:15:46,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:15:46,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2023-08-30 00:15:46,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:16:16,687 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2023-08-30 00:16:16,700 INFO L131 PetriNetUnfolder]: For 534737/534737 co-relation queries the response was YES. [2023-08-30 00:16:19,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922814 conditions, 260708 events. 201899/260708 cut-off events. For 534737/534737 co-relation queries the response was YES. Maximal size of possible extension queue 4866. Compared 1532061 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922771. Up to 86887 conditions per place. [2023-08-30 00:16:20,620 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-08-30 00:16:20,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 200 transitions, 1504 flow [2023-08-30 00:16:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:16:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:16:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1346 transitions. [2023-08-30 00:16:20,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381510416666667 [2023-08-30 00:16:20,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1346 transitions. [2023-08-30 00:16:20,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1346 transitions. [2023-08-30 00:16:20,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:16:20,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1346 transitions. [2023-08-30 00:16:20,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:20,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:20,628 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 384.0) internal successors, (3456), 9 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:20,628 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 436 flow. Second operand 8 states and 1346 transitions. [2023-08-30 00:16:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 200 transitions, 1504 flow [2023-08-30 00:16:22,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 200 transitions, 1485 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:16:22,763 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 520 flow [2023-08-30 00:16:22,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2023-08-30 00:16:22,764 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2023-08-30 00:16:22,764 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 520 flow [2023-08-30 00:16:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.2) internal successors, (1552), 10 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:16:22,765 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:16:22,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:16:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:22,969 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:16:22,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:16:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 378904885, now seen corresponding path program 2 times [2023-08-30 00:16:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:16:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469839359] [2023-08-30 00:16:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:16:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:16:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:16:22,970 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:16:22,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:16:23,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:16:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:16:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:16:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:16:23,371 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:16:23,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:16:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:16:23,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:16:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:16:24,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:16:24,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469839359] [2023-08-30 00:16:24,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469839359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:16:24,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:16:24,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:16:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977727937] [2023-08-30 00:16:24,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:16:24,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:16:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:16:24,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:16:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:16:33,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 00:16:33,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:16:33,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:16:33,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 00:16:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:17:10,939 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2023-08-30 00:17:10,939 INFO L131 PetriNetUnfolder]: For 878235/903610 co-relation queries the response was YES. [2023-08-30 00:17:13,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978910 conditions, 238130 events. 183763/238130 cut-off events. For 878235/903610 co-relation queries the response was YES. Maximal size of possible extension queue 5117. Compared 1435100 event pairs, 69301 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978862. Up to 105814 conditions per place. [2023-08-30 00:17:14,685 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2023-08-30 00:17:14,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 501 transitions, 4014 flow [2023-08-30 00:17:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:17:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:17:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-08-30 00:17:14,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42283442982456143 [2023-08-30 00:17:14,690 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-08-30 00:17:14,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-08-30 00:17:14,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:17:14,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-08-30 00:17:14,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:14,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:14,699 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:14,699 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 520 flow. Second operand 19 states and 3085 transitions. [2023-08-30 00:17:14,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 501 transitions, 4014 flow [2023-08-30 00:17:18,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 501 transitions, 3792 flow, removed 98 selfloop flow, removed 3 redundant places. [2023-08-30 00:17:18,551 INFO L231 Difference]: Finished difference. Result has 135 places, 87 transitions, 662 flow [2023-08-30 00:17:18,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=662, PETRI_PLACES=135, PETRI_TRANSITIONS=87} [2023-08-30 00:17:18,552 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2023-08-30 00:17:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 87 transitions, 662 flow [2023-08-30 00:17:18,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.22222222222223) internal successors, (2650), 18 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:18,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:17:18,553 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:17:18,560 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 00:17:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:17:18,754 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:17:18,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:17:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash -796862084, now seen corresponding path program 3 times [2023-08-30 00:17:18,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:17:18,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917500346] [2023-08-30 00:17:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:17:18,755 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 00:17:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:17:18,756 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:17:18,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 00:17:18,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:17:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:17:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:17:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:17:19,138 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:17:19,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:17:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:17:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:17:21,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:17:21,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917500346] [2023-08-30 00:17:21,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917500346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:17:21,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:17:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:17:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384056940] [2023-08-30 00:17:21,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:17:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:17:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:17:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:17:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:17:36,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 384 [2023-08-30 00:17:36,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 87 transitions, 662 flow. Second operand has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:17:36,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:17:36,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 384 [2023-08-30 00:17:36,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:19:09,683 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2023-08-30 00:19:09,683 INFO L131 PetriNetUnfolder]: For 2098057/2156156 co-relation queries the response was YES. [2023-08-30 00:19:15,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290389 conditions, 550178 events. 425599/550178 cut-off events. For 2098057/2156156 co-relation queries the response was YES. Maximal size of possible extension queue 6976. Compared 3370161 event pairs, 304837 based on Foata normal form. 58111/608272 useless extension candidates. Maximal degree in co-relation 2290336. Up to 96633 conditions per place. [2023-08-30 00:19:18,177 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 1092 selfloop transitions, 25 changer transitions 0/1119 dead transitions. [2023-08-30 00:19:18,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1119 transitions, 8909 flow [2023-08-30 00:19:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:19:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:19:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4613 transitions. [2023-08-30 00:19:18,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48052083333333334 [2023-08-30 00:19:18,182 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4613 transitions. [2023-08-30 00:19:18,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4613 transitions. [2023-08-30 00:19:18,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:19:18,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4613 transitions. [2023-08-30 00:19:18,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 184.52) internal successors, (4613), 25 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:18,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:18,194 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:18,194 INFO L175 Difference]: Start difference. First operand has 135 places, 87 transitions, 662 flow. Second operand 25 states and 4613 transitions. [2023-08-30 00:19:18,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1119 transitions, 8909 flow [2023-08-30 00:19:47,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1119 transitions, 8820 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-08-30 00:19:47,248 INFO L231 Difference]: Finished difference. Result has 153 places, 100 transitions, 756 flow [2023-08-30 00:19:47,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=756, PETRI_PLACES=153, PETRI_TRANSITIONS=100} [2023-08-30 00:19:47,249 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 76 predicate places. [2023-08-30 00:19:47,249 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 100 transitions, 756 flow [2023-08-30 00:19:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:47,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:19:47,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:19:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-08-30 00:19:47,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:47,450 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:19:47,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:19:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash 591158824, now seen corresponding path program 2 times [2023-08-30 00:19:47,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:19:47,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165508430] [2023-08-30 00:19:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:19:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:19:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:19:47,452 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:19:47,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 00:19:47,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:19:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:19:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:19:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:19:47,727 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:19:47,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:19:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:19:48,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:19:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:19:49,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:19:49,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165508430] [2023-08-30 00:19:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165508430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:19:49,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:19:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 00:19:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95917653] [2023-08-30 00:19:49,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:19:49,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:19:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:19:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:19:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:19:57,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2023-08-30 00:19:57,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 100 transitions, 756 flow. Second operand has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:19:57,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:19:57,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2023-08-30 00:19:57,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:21:21,986 INFO L130 PetriNetUnfolder]: 434799/563292 cut-off events. [2023-08-30 00:21:21,987 INFO L131 PetriNetUnfolder]: For 2186294/2246189 co-relation queries the response was YES. [2023-08-30 00:21:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332077 conditions, 563292 events. 434799/563292 cut-off events. For 2186294/2246189 co-relation queries the response was YES. Maximal size of possible extension queue 7695. Compared 3559969 event pairs, 217437 based on Foata normal form. 61733/625011 useless extension candidates. Maximal degree in co-relation 2332025. Up to 352210 conditions per place. [2023-08-30 00:21:30,170 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 488 selfloop transitions, 24 changer transitions 0/514 dead transitions. [2023-08-30 00:21:30,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 4214 flow [2023-08-30 00:21:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:21:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:21:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3076 transitions. [2023-08-30 00:21:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160087719298245 [2023-08-30 00:21:30,175 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3076 transitions. [2023-08-30 00:21:30,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3076 transitions. [2023-08-30 00:21:30,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:21:30,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3076 transitions. [2023-08-30 00:21:30,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.89473684210526) internal successors, (3076), 19 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:30,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:30,316 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:21:30,316 INFO L175 Difference]: Start difference. First operand has 153 places, 100 transitions, 756 flow. Second operand 19 states and 3076 transitions. [2023-08-30 00:21:30,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 4214 flow [2023-08-30 00:22:18,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 514 transitions, 4136 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-08-30 00:22:18,358 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 847 flow [2023-08-30 00:22:18,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=847, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2023-08-30 00:22:18,358 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 83 predicate places. [2023-08-30 00:22:18,358 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 847 flow [2023-08-30 00:22:18,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 147.44444444444446) internal successors, (2654), 18 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:18,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:22:18,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 00:22:18,367 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 00:22:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:18,560 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-30 00:22:18,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:22:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 725096965, now seen corresponding path program 3 times [2023-08-30 00:22:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:22:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459343673] [2023-08-30 00:22:18,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:22:18,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:22:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:22:18,562 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:22:18,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 00:22:18,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:22:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:22:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:22:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:22:18,889 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-30 00:22:18,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-30 00:22:19,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-30 00:22:19,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 00:22:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:19,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:22:19,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-30 00:22:19,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-30 00:22:19,347 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 00:22:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:22:20,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:22:20,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459343673] [2023-08-30 00:22:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459343673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:22:20,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:22:20,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-08-30 00:22:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815062626] [2023-08-30 00:22:20,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:22:20,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:22:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:22:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:22:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:22:35,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2023-08-30 00:22:35,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 847 flow. Second operand has 21 states, 21 states have (on average 152.23809523809524) internal successors, (3197), 21 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:22:35,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:22:35,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2023-08-30 00:22:35,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:24:04,489 INFO L130 PetriNetUnfolder]: 443249/575297 cut-off events. [2023-08-30 00:24:04,490 INFO L131 PetriNetUnfolder]: For 2651667/2713330 co-relation queries the response was YES. [2023-08-30 00:24:09,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532618 conditions, 575297 events. 443249/575297 cut-off events. For 2651667/2713330 co-relation queries the response was YES. Maximal size of possible extension queue 8075. Compared 3639543 event pairs, 234449 based on Foata normal form. 63469/638762 useless extension candidates. Maximal degree in co-relation 2532566. Up to 404383 conditions per place. [2023-08-30 00:24:12,435 INFO L137 encePairwiseOnDemand]: 374/384 looper letters, 692 selfloop transitions, 52 changer transitions 0/746 dead transitions. [2023-08-30 00:24:12,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 746 transitions, 6380 flow [2023-08-30 00:24:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:24:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:24:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4037 transitions. [2023-08-30 00:24:12,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380425347222222 [2023-08-30 00:24:12,440 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4037 transitions. [2023-08-30 00:24:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4037 transitions. [2023-08-30 00:24:12,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:24:12,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4037 transitions. [2023-08-30 00:24:12,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.20833333333334) internal successors, (4037), 24 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:12,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:12,448 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 384.0) internal successors, (9600), 25 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:24:12,448 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 847 flow. Second operand 24 states and 4037 transitions. [2023-08-30 00:24:12,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 746 transitions, 6380 flow Killed by 15