./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:42:49,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:42:49,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:42:49,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:42:49,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:42:49,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:42:49,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:42:49,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:42:49,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:42:49,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:42:49,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:42:49,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:42:49,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:42:49,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:42:49,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:42:49,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:42:49,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:42:49,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:42:49,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:42:49,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:42:49,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:42:49,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:42:49,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:42:49,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:42:49,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:42:49,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:42:49,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:42:49,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:42:49,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:42:49,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:42:49,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:42:49,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:42:49,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:42:49,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:42:49,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:42:49,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:42:49,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:42:49,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:42:49,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:42:49,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:42:49,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:42:49,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:42:49,860 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:42:49,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:42:49,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:42:49,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:42:49,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:42:49,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:42:49,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:42:49,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:42:49,864 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:42:49,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:42:49,865 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:42:49,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:42:49,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:42:49,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:42:49,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:42:49,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:42:49,867 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:42:49,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:42:49,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:42:49,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:42:49,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:49,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:42:49,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:42:49,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:42:49,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:42:49,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:42:49,869 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:42:49,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:42:49,869 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:42:49,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:42:50,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:42:50,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:42:50,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:42:50,202 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:42:50,203 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:42:50,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 06:42:51,334 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:42:51,551 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:42:51,552 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 06:42:51,559 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cb250a04/0b65ad01ad9946929e80ee23d4a08126/FLAGfa7eb9de0 [2023-08-30 06:42:51,584 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cb250a04/0b65ad01ad9946929e80ee23d4a08126 [2023-08-30 06:42:51,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:42:51,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:42:51,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:51,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:42:51,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:42:51,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:51" (1/1) ... [2023-08-30 06:42:51,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba3cb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:51, skipping insertion in model container [2023-08-30 06:42:51,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:51" (1/1) ... [2023-08-30 06:42:51,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:42:51,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:51,825 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 06:42:51,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:51,853 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 06:42:51,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f3ebad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:51, skipping insertion in model container [2023-08-30 06:42:51,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:51,856 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:42:51,858 INFO L158 Benchmark]: Toolchain (without parser) took 268.09ms. Allocated memory is still 81.8MB. Free memory was 61.2MB in the beginning and 51.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:42:51,859 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:42:51,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.03ms. Allocated memory is still 81.8MB. Free memory was 61.0MB in the beginning and 51.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:42:51,861 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 62.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.03ms. Allocated memory is still 81.8MB. Free memory was 61.0MB in the beginning and 51.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:42:53,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:42:53,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:42:53,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:42:53,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:42:53,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:42:53,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:42:53,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:42:53,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:42:53,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:42:53,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:42:53,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:42:53,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:42:53,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:42:53,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:42:53,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:42:53,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:42:53,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:42:53,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:42:53,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:42:53,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:42:53,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:42:53,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:42:53,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:42:53,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:42:53,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:42:53,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:42:53,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:42:53,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:42:53,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:42:53,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:42:53,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:42:53,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:42:53,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:42:53,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:42:53,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:42:53,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:42:53,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:42:53,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:42:53,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:42:53,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:42:53,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:42:53,777 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:42:53,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:42:53,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:42:53,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:42:53,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:42:53,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:42:53,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:42:53,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:42:53,781 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:42:53,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:42:53,782 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:42:53,782 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:42:53,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:42:53,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:42:53,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:42:53,783 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:42:53,783 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:42:53,783 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:42:53,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:42:53,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:42:53,784 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:42:53,784 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:42:53,784 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:42:53,785 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:42:53,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:42:53,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:42:53,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:42:53,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:53,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:42:53,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:42:53,786 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:42:53,786 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:42:53,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:42:53,787 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:42:53,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:42:53,787 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:42:53,787 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:42:53,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:42:54,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:42:54,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:42:54,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:42:54,131 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:42:54,131 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:42:54,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 06:42:55,391 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:42:55,596 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:42:55,597 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 06:42:55,609 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff33e1fd/615b432bbe8e48d6a2315ff717208c98/FLAG31313a0ca [2023-08-30 06:42:55,621 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff33e1fd/615b432bbe8e48d6a2315ff717208c98 [2023-08-30 06:42:55,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:42:55,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:42:55,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:55,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:42:55,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:42:55,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efb1954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55, skipping insertion in model container [2023-08-30 06:42:55,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:42:55,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:55,793 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 06:42:55,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:55,813 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:42:55,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:42:55,829 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 06:42:55,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:55,837 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:42:55,859 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 06:42:55,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:42:55,871 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:42:55,871 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:42:55,877 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:42:55,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55 WrapperNode [2023-08-30 06:42:55,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:42:55,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:42:55,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:42:55,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:42:55,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,937 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2023-08-30 06:42:55,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:42:55,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:42:55,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:42:55,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:42:55,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:42:55,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:42:55,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:42:55,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:42:55,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (1/1) ... [2023-08-30 06:42:55,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:42:56,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:42:56,020 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 06:42:56,043 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 06:42:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:42:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:42:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:42:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:42:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:42:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:42:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:42:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:42:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:42:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:42:56,062 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 06:42:56,235 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:42:56,236 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:42:56,751 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:42:56,841 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:42:56,841 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:42:56,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:42:56 BoogieIcfgContainer [2023-08-30 06:42:56,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:42:56,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:42:56,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:42:56,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:42:56,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:42:55" (1/3) ... [2023-08-30 06:42:56,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635adafd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:42:56, skipping insertion in model container [2023-08-30 06:42:56,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:42:55" (2/3) ... [2023-08-30 06:42:56,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635adafd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:42:56, skipping insertion in model container [2023-08-30 06:42:56,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:42:56" (3/3) ... [2023-08-30 06:42:56,850 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-08-30 06:42:56,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:42:56,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 06:42:56,867 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:42:56,946 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:42:56,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 06:42:57,072 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-08-30 06:42:57,072 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:42:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 06:42:57,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 418 flow [2023-08-30 06:42:57,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 195 transitions, 402 flow [2023-08-30 06:42:57,097 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:42:57,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 06:42:57,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 195 transitions, 402 flow [2023-08-30 06:42:57,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 195 transitions, 402 flow [2023-08-30 06:42:57,146 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-08-30 06:42:57,147 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:42:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 15/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2023-08-30 06:42:57,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-08-30 06:43:15,164 INFO L134 LiptonReduction]: Checked pairs total: 3331 [2023-08-30 06:43:15,165 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-30 06:43:15,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:43:15,193 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;@3bb4d23f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:43:15,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-30 06:43:15,198 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:43:15,198 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:15,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:15,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:43:15,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:15,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 26589, now seen corresponding path program 1 times [2023-08-30 06:43:15,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723582350] [2023-08-30 06:43:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:15,251 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 06:43:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:15,264 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 06:43:15,302 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 06:43:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:43:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:15,594 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:43:15,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:43:15,640 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 06:43:15,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:15,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723582350] [2023-08-30 06:43:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723582350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:15,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:15,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238105461] [2023-08-30 06:43:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:15,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:15,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 06:43:15,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:15,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:15,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 06:43:15,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:16,279 INFO L130 PetriNetUnfolder]: 436/746 cut-off events. [2023-08-30 06:43:16,280 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 06:43:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 746 events. 436/746 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4120 event pairs, 378 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 1382. Up to 726 conditions per place. [2023-08-30 06:43:16,287 INFO L137 encePairwiseOnDemand]: 401/413 looper letters, 46 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-30 06:43:16,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 216 flow [2023-08-30 06:43:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 06:43:16,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45117029862792574 [2023-08-30 06:43:16,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 06:43:16,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 06:43:16,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:16,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 06:43:16,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,333 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 108 flow. Second operand 3 states and 559 transitions. [2023-08-30 06:43:16,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 216 flow [2023-08-30 06:43:16,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:43:16,357 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 132 flow [2023-08-30 06:43:16,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 06:43:16,362 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-30 06:43:16,363 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 132 flow [2023-08-30 06:43:16,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:16,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:43:16,381 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 06:43:16,581 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 06:43:16,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:16,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 26588, now seen corresponding path program 1 times [2023-08-30 06:43:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227572512] [2023-08-30 06:43:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:16,583 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 06:43:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:16,584 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 06:43:16,588 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 06:43:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:43:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:16,688 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:43:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:43:16,698 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 06:43:16,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:16,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227572512] [2023-08-30 06:43:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227572512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:16,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:16,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:16,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320161381] [2023-08-30 06:43:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:16,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:16,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 06:43:16,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:16,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:16,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 06:43:16,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:17,059 INFO L130 PetriNetUnfolder]: 436/740 cut-off events. [2023-08-30 06:43:17,060 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 740 events. 436/740 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4122 event pairs, 378 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 1467. Up to 726 conditions per place. [2023-08-30 06:43:17,065 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 06:43:17,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 212 flow [2023-08-30 06:43:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-30 06:43:17,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390637610976594 [2023-08-30 06:43:17,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-30 06:43:17,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-30 06:43:17,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:17,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-30 06:43:17,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,074 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 132 flow. Second operand 3 states and 544 transitions. [2023-08-30 06:43:17,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 212 flow [2023-08-30 06:43:17,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:17,076 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-08-30 06:43:17,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 06:43:17,077 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 06:43:17,077 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-08-30 06:43:17,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:17,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:43:17,088 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 06:43:17,288 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 06:43:17,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:17,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash 827133, now seen corresponding path program 1 times [2023-08-30 06:43:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19681331] [2023-08-30 06:43:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:17,292 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 06:43:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:17,293 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 06:43:17,294 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 06:43:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:43:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:17,378 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:43:17,402 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 06:43:17,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:17,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19681331] [2023-08-30 06:43:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19681331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295534284] [2023-08-30 06:43:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:17,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:17,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 06:43:17,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:17,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 06:43:17,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:17,803 INFO L130 PetriNetUnfolder]: 436/738 cut-off events. [2023-08-30 06:43:17,804 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:17,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 738 events. 436/738 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 4090 event pairs, 378 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 1483. Up to 720 conditions per place. [2023-08-30 06:43:17,810 INFO L137 encePairwiseOnDemand]: 411/413 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 06:43:17,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-08-30 06:43:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 06:43:17,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43664245359160614 [2023-08-30 06:43:17,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 06:43:17,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 06:43:17,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:17,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 06:43:17,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,818 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 541 transitions. [2023-08-30 06:43:17,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-08-30 06:43:17,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:17,824 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 121 flow [2023-08-30 06:43:17,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 06:43:17,825 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 06:43:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 121 flow [2023-08-30 06:43:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:17,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:17,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:43:17,839 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 06:43:18,037 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 06:43:18,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:18,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 826017, now seen corresponding path program 1 times [2023-08-30 06:43:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008512582] [2023-08-30 06:43:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:18,040 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 06:43:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:18,041 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 06:43:18,044 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 06:43:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:18,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:43:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:18,168 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:43:18,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:43:18,227 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 06:43:18,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:18,421 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 06:43:18,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008512582] [2023-08-30 06:43:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008512582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:18,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:18,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:43:18,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114469928] [2023-08-30 06:43:18,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:18,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:43:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:43:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:43:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 06:43:19,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 121 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 06:43:19,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:19,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 06:43:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:20,409 INFO L130 PetriNetUnfolder]: 878/1482 cut-off events. [2023-08-30 06:43:20,410 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:43:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 1482 events. 878/1482 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 9383 event pairs, 756 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 2992. Up to 723 conditions per place. [2023-08-30 06:43:20,417 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 71 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2023-08-30 06:43:20,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 92 transitions, 443 flow [2023-08-30 06:43:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:43:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:43:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-08-30 06:43:20,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188861985472155 [2023-08-30 06:43:20,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-08-30 06:43:20,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-08-30 06:43:20,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:20,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-08-30 06:43:20,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:20,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:20,431 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:20,431 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 121 flow. Second operand 6 states and 1038 transitions. [2023-08-30 06:43:20,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 92 transitions, 443 flow [2023-08-30 06:43:20,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 92 transitions, 438 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:20,435 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 279 flow [2023-08-30 06:43:20,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-08-30 06:43:20,437 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-30 06:43:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 279 flow [2023-08-30 06:43:20,438 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 06:43:20,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:20,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:43:20,451 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 06:43:20,647 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 06:43:20,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:20,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash 25640801, now seen corresponding path program 1 times [2023-08-30 06:43:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478933473] [2023-08-30 06:43:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:20,650 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 06:43:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:20,654 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 06:43:20,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:43:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:43:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:20,785 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:43:20,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:43:20,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 06:43:20,880 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 06:43:20,880 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:20,956 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 06:43:20,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:20,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478933473] [2023-08-30 06:43:20,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478933473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:20,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:20,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:20,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814017032] [2023-08-30 06:43:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:20,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:21,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 06:43:21,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:21,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 06:43:21,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:21,900 INFO L130 PetriNetUnfolder]: 876/1478 cut-off events. [2023-08-30 06:43:21,900 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 06:43:21,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1478 events. 876/1478 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 9370 event pairs, 756 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 3026. Up to 1443 conditions per place. [2023-08-30 06:43:21,908 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 48 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-30 06:43:21,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 363 flow [2023-08-30 06:43:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:43:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:43:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-30 06:43:21,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279661016949153 [2023-08-30 06:43:21,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-30 06:43:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-30 06:43:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-30 06:43:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,919 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 279 flow. Second operand 4 states and 707 transitions. [2023-08-30 06:43:21,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 363 flow [2023-08-30 06:43:21,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 348 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:21,924 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 252 flow [2023-08-30 06:43:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-08-30 06:43:21,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 06:43:21,927 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 252 flow [2023-08-30 06:43:21,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:21,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:21,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:43:21,941 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 06:43:22,138 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 06:43:22,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:22,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash 25640802, now seen corresponding path program 1 times [2023-08-30 06:43:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:22,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456683966] [2023-08-30 06:43:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:22,140 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 06:43:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:22,142 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 06:43:22,144 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 06:43:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:43:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:22,290 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2023-08-30 06:43:22,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 06:43:22,334 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:43:22,334 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:22,360 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 06:43:22,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:22,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:22,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456683966] [2023-08-30 06:43:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456683966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:22,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744952914] [2023-08-30 06:43:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 413 [2023-08-30 06:43:22,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:22,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:22,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 413 [2023-08-30 06:43:22,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:22,753 INFO L130 PetriNetUnfolder]: 666/1156 cut-off events. [2023-08-30 06:43:22,753 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 06:43:22,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1156 events. 666/1156 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 7070 event pairs, 568 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 2368. Up to 1128 conditions per place. [2023-08-30 06:43:22,760 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 49 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 06:43:22,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 328 flow [2023-08-30 06:43:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 06:43:22,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44229217110573044 [2023-08-30 06:43:22,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 06:43:22,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 06:43:22,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:22,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 06:43:22,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:22,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:22,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:22,766 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 252 flow. Second operand 3 states and 548 transitions. [2023-08-30 06:43:22,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 328 flow [2023-08-30 06:43:22,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:22,768 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 223 flow [2023-08-30 06:43:22,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-30 06:43:22,769 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 06:43:22,769 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 223 flow [2023-08-30 06:43:22,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:22,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:22,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:43:22,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:22,979 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 06:43:22,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:22,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1160185635, now seen corresponding path program 2 times [2023-08-30 06:43:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:22,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044406209] [2023-08-30 06:43:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:43:22,981 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 06:43:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:22,982 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 06:43:22,985 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 06:43:23,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:43:23,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:43:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:43:23,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:23,120 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:43:23,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:43:23,249 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 06:43:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:23,746 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 06:43:23,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044406209] [2023-08-30 06:43:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044406209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:23,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:23,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:43:23,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668100093] [2023-08-30 06:43:23,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:23,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:43:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:43:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:43:26,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 06:43:26,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 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 06:43:26,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:26,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 06:43:26,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:29,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:31,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:33,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:35,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:37,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:43:40,915 INFO L130 PetriNetUnfolder]: 2646/4583 cut-off events. [2023-08-30 06:43:40,916 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 06:43:40,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 4583 events. 2646/4583 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33496 event pairs, 2272 based on Foata normal form. 11/1781 useless extension candidates. Maximal degree in co-relation 9280. Up to 557 conditions per place. [2023-08-30 06:43:40,939 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 244 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2023-08-30 06:43:40,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 281 transitions, 1401 flow [2023-08-30 06:43:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:43:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:43:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2675 transitions. [2023-08-30 06:43:40,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317998385794996 [2023-08-30 06:43:40,949 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2675 transitions. [2023-08-30 06:43:40,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2675 transitions. [2023-08-30 06:43:40,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:40,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2675 transitions. [2023-08-30 06:43:40,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.33333333333334) internal successors, (2675), 15 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:40,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:40,965 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:40,965 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 223 flow. Second operand 15 states and 2675 transitions. [2023-08-30 06:43:40,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 281 transitions, 1401 flow [2023-08-30 06:43:40,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 281 transitions, 1400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:40,970 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 526 flow [2023-08-30 06:43:40,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=526, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-30 06:43:40,970 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2023-08-30 06:43:40,971 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 526 flow [2023-08-30 06:43:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 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 06:43:40,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:40,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:43:40,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:41,181 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 06:43:41,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:41,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971168, now seen corresponding path program 1 times [2023-08-30 06:43:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126730181] [2023-08-30 06:43:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:41,182 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 06:43:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:41,183 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 06:43:41,185 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 06:43:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:43:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:41,329 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 06:43:41,330 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 06:43:41,351 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 42 treesize of output 38 [2023-08-30 06:43:41,401 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 06:43:41,401 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:41,610 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 06:43:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:41,915 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 06:43:41,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126730181] [2023-08-30 06:43:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126730181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:41,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:41,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-08-30 06:43:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061440328] [2023-08-30 06:43:41,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 06:43:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 06:43:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-30 06:43:42,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 413 [2023-08-30 06:43:42,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:42,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:42,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 413 [2023-08-30 06:43:42,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:45,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 06:43:46,380 INFO L130 PetriNetUnfolder]: 2518/4327 cut-off events. [2023-08-30 06:43:46,380 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 06:43:46,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4327 events. 2518/4327 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31554 event pairs, 2160 based on Foata normal form. 0/1717 useless extension candidates. Maximal degree in co-relation 8842. Up to 3668 conditions per place. [2023-08-30 06:43:46,400 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 83 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2023-08-30 06:43:46,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 788 flow [2023-08-30 06:43:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:43:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:43:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1312 transitions. [2023-08-30 06:43:46,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39709443099273606 [2023-08-30 06:43:46,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1312 transitions. [2023-08-30 06:43:46,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1312 transitions. [2023-08-30 06:43:46,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:46,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1312 transitions. [2023-08-30 06:43:46,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,413 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,413 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 526 flow. Second operand 8 states and 1312 transitions. [2023-08-30 06:43:46,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 788 flow [2023-08-30 06:43:46,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 702 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 06:43:46,417 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 483 flow [2023-08-30 06:43:46,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=483, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-30 06:43:46,418 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-08-30 06:43:46,418 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 483 flow [2023-08-30 06:43:46,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.33333333333334) internal successors, (1407), 9 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:46,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:43:46,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:46,626 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 06:43:46,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:46,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971167, now seen corresponding path program 1 times [2023-08-30 06:43:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678743341] [2023-08-30 06:43:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:46,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:43:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:46,639 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 06:43:46,640 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 06:43:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:46,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:43:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:46,798 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 06:43:46,798 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 2 case distinctions, treesize of input 26 treesize of output 33 [2023-08-30 06:43:46,820 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:43:46,820 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:43:46,832 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 06:43:46,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:46,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678743341] [2023-08-30 06:43:46,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678743341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:46,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:46,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:43:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26098163] [2023-08-30 06:43:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:46,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:43:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:43:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:43:46,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 06:43:46,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 483 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:46,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:46,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 06:43:46,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:47,498 INFO L130 PetriNetUnfolder]: 2390/4071 cut-off events. [2023-08-30 06:43:47,498 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2023-08-30 06:43:47,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8325 conditions, 4071 events. 2390/4071 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 29081 event pairs, 2048 based on Foata normal form. 0/1679 useless extension candidates. Maximal degree in co-relation 8300. Up to 3959 conditions per place. [2023-08-30 06:43:47,525 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 70 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-30 06:43:47,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 621 flow [2023-08-30 06:43:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:43:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:43:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 06:43:47,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43422114608555284 [2023-08-30 06:43:47,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 06:43:47,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 06:43:47,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:47,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 06:43:47,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,532 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 483 flow. Second operand 3 states and 538 transitions. [2023-08-30 06:43:47,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 621 flow [2023-08-30 06:43:47,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 584 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 06:43:47,536 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 444 flow [2023-08-30 06:43:47,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-08-30 06:43:47,537 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 06:43:47,537 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 444 flow [2023-08-30 06:43:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:47,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:43:47,548 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 06:43:47,748 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 06:43:47,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:47,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971283, now seen corresponding path program 1 times [2023-08-30 06:43:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:47,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894639271] [2023-08-30 06:43:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:47,749 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 06:43:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:47,750 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 06:43:47,751 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 06:43:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:43:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:47,829 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:43:47,843 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 06:43:47,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:47,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894639271] [2023-08-30 06:43:47,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894639271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:47,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:47,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:43:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027862788] [2023-08-30 06:43:47,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:47,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:47,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 06:43:47,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 444 flow. Second operand has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:47,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:47,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 06:43:47,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:48,585 INFO L130 PetriNetUnfolder]: 1998/3399 cut-off events. [2023-08-30 06:43:48,585 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 06:43:48,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 3399 events. 1998/3399 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23269 event pairs, 1664 based on Foata normal form. 0/1511 useless extension candidates. Maximal degree in co-relation 6935. Up to 3266 conditions per place. [2023-08-30 06:43:48,600 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 58 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2023-08-30 06:43:48,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 578 flow [2023-08-30 06:43:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:43:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:43:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 668 transitions. [2023-08-30 06:43:48,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043583535108959 [2023-08-30 06:43:48,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 668 transitions. [2023-08-30 06:43:48,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 668 transitions. [2023-08-30 06:43:48,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:48,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 668 transitions. [2023-08-30 06:43:48,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:48,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:48,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:48,608 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 444 flow. Second operand 4 states and 668 transitions. [2023-08-30 06:43:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 578 flow [2023-08-30 06:43:48,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:43:48,612 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 461 flow [2023-08-30 06:43:48,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 06:43:48,613 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 06:43:48,613 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 461 flow [2023-08-30 06:43:48,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:48,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:48,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:43:48,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:43:48,825 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 06:43:48,826 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:48,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971282, now seen corresponding path program 1 times [2023-08-30 06:43:48,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:48,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121398677] [2023-08-30 06:43:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:48,827 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 06:43:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:48,828 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 06:43:48,831 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 06:43:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:43:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:48,944 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 06:43:48,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:48,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121398677] [2023-08-30 06:43:48,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121398677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:48,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:48,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:43:48,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600290283] [2023-08-30 06:43:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:43:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:43:48,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:43:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 06:43:49,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:49,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:49,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 06:43:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:49,870 INFO L130 PetriNetUnfolder]: 3534/5975 cut-off events. [2023-08-30 06:43:49,870 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-30 06:43:49,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 5975 events. 3534/5975 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 44824 event pairs, 1280 based on Foata normal form. 0/2719 useless extension candidates. Maximal degree in co-relation 12169. Up to 3521 conditions per place. [2023-08-30 06:43:49,898 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 76 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2023-08-30 06:43:49,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 682 flow [2023-08-30 06:43:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:43:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:43:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2023-08-30 06:43:49,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43099273607748184 [2023-08-30 06:43:49,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2023-08-30 06:43:49,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2023-08-30 06:43:49,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:49,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2023-08-30 06:43:49,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:49,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:49,906 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:49,906 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 461 flow. Second operand 4 states and 712 transitions. [2023-08-30 06:43:49,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 682 flow [2023-08-30 06:43:49,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 670 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:49,910 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 499 flow [2023-08-30 06:43:49,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-08-30 06:43:49,911 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-08-30 06:43:49,911 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 499 flow [2023-08-30 06:43:49,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:49,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:49,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:43:49,925 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 06:43:50,123 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 06:43:50,123 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:50,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:50,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1128971162, now seen corresponding path program 1 times [2023-08-30 06:43:50,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:50,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529476725] [2023-08-30 06:43:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:50,124 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 06:43:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:50,125 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 06:43:50,128 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 06:43:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:43:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:50,269 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 06:43:50,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:50,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:50,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529476725] [2023-08-30 06:43:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529476725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:50,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044857322] [2023-08-30 06:43:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 413 [2023-08-30 06:43:50,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 499 flow. Second operand has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:50,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:50,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 413 [2023-08-30 06:43:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:51,286 INFO L130 PetriNetUnfolder]: 4080/7110 cut-off events. [2023-08-30 06:43:51,286 INFO L131 PetriNetUnfolder]: For 751/751 co-relation queries the response was YES. [2023-08-30 06:43:51,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15949 conditions, 7110 events. 4080/7110 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 56541 event pairs, 3552 based on Foata normal form. 128/4150 useless extension candidates. Maximal degree in co-relation 15922. Up to 5894 conditions per place. [2023-08-30 06:43:51,315 INFO L137 encePairwiseOnDemand]: 403/413 looper letters, 105 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2023-08-30 06:43:51,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 967 flow [2023-08-30 06:43:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:43:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:43:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 724 transitions. [2023-08-30 06:43:51,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43825665859564167 [2023-08-30 06:43:51,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 724 transitions. [2023-08-30 06:43:51,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 724 transitions. [2023-08-30 06:43:51,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:51,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 724 transitions. [2023-08-30 06:43:51,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:51,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:51,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:51,323 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 499 flow. Second operand 4 states and 724 transitions. [2023-08-30 06:43:51,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 967 flow [2023-08-30 06:43:51,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 942 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:51,328 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 506 flow [2023-08-30 06:43:51,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-08-30 06:43:51,328 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-08-30 06:43:51,328 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 506 flow [2023-08-30 06:43:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:51,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:51,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:51,343 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 06:43:51,539 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 06:43:51,539 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:51,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800086, now seen corresponding path program 1 times [2023-08-30 06:43:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:51,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668652788] [2023-08-30 06:43:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:51,542 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 06:43:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:51,543 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 06:43:51,546 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 06:43:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:51,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:43:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:51,746 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:43:51,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:43:51,783 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:43:51,784 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:43:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:43:51,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:43:51,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:51,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668652788] [2023-08-30 06:43:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668652788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:43:51,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:43:51,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:43:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839603793] [2023-08-30 06:43:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:43:51,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:43:51,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:43:51,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:43:51,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-30 06:43:51,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 506 flow. Second operand has 4 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 06:43:51,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:43:51,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-30 06:43:51,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:43:52,492 INFO L130 PetriNetUnfolder]: 3048/5430 cut-off events. [2023-08-30 06:43:52,492 INFO L131 PetriNetUnfolder]: For 1495/1519 co-relation queries the response was YES. [2023-08-30 06:43:52,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13408 conditions, 5430 events. 3048/5430 cut-off events. For 1495/1519 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41967 event pairs, 2600 based on Foata normal form. 0/4110 useless extension candidates. Maximal degree in co-relation 13380. Up to 5329 conditions per place. [2023-08-30 06:43:52,520 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 57 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2023-08-30 06:43:52,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 636 flow [2023-08-30 06:43:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:43:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:43:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 690 transitions. [2023-08-30 06:43:52,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41767554479418884 [2023-08-30 06:43:52,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 690 transitions. [2023-08-30 06:43:52,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 690 transitions. [2023-08-30 06:43:52,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:43:52,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 690 transitions. [2023-08-30 06:43:52,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:52,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:52,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:43:52,528 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 506 flow. Second operand 4 states and 690 transitions. [2023-08-30 06:43:52,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 636 flow [2023-08-30 06:43:52,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 631 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:43:52,533 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 517 flow [2023-08-30 06:43:52,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-30 06:43:52,534 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-08-30 06:43:52,534 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 517 flow [2023-08-30 06:43:52,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 06:43:52,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:43:52,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:43:52,548 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 06:43:52,745 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 06:43:52,746 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:43:52,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:43:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1574800085, now seen corresponding path program 1 times [2023-08-30 06:43:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:43:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195710054] [2023-08-30 06:43:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:43:52,746 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 06:43:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:43:52,748 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 06:43:52,751 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 06:43:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:43:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:43:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:43:52,982 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:43:52,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:43:53,037 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:43:53,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:43:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:43:53,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:43:53,147 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:43:53,147 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 13 treesize of output 13 [2023-08-30 06:43:53,198 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 06:43:53,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:43:56,554 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 06:43:56,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:43:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195710054] [2023-08-30 06:43:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195710054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:43:56,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:43:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:43:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898017662] [2023-08-30 06:43:56,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:43:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:43:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:43:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:43:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:43:58,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:44:00,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:44:06,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:44:11,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 413 [2023-08-30 06:44:11,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:11,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:11,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 413 [2023-08-30 06:44:11,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:25,171 WARN L222 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:44:27,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:44:46,168 INFO L130 PetriNetUnfolder]: 6284/11124 cut-off events. [2023-08-30 06:44:46,168 INFO L131 PetriNetUnfolder]: For 3443/3443 co-relation queries the response was YES. [2023-08-30 06:44:46,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27320 conditions, 11124 events. 6284/11124 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 92557 event pairs, 5256 based on Foata normal form. 352/9244 useless extension candidates. Maximal degree in co-relation 27292. Up to 4194 conditions per place. [2023-08-30 06:44:46,224 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 110 selfloop transitions, 46 changer transitions 0/158 dead transitions. [2023-08-30 06:44:46,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 158 transitions, 1364 flow [2023-08-30 06:44:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:44:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:44:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2323 transitions. [2023-08-30 06:44:46,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37497982243744954 [2023-08-30 06:44:46,233 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2323 transitions. [2023-08-30 06:44:46,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2323 transitions. [2023-08-30 06:44:46,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:46,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2323 transitions. [2023-08-30 06:44:46,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 154.86666666666667) internal successors, (2323), 15 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:46,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:46,245 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:46,245 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 517 flow. Second operand 15 states and 2323 transitions. [2023-08-30 06:44:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 158 transitions, 1364 flow [2023-08-30 06:44:46,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 158 transitions, 1351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:46,257 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 912 flow [2023-08-30 06:44:46,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=912, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2023-08-30 06:44:46,257 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-08-30 06:44:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 912 flow [2023-08-30 06:44:46,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.75) internal successors, (1206), 8 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:46,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:46,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:46,269 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 06:44:46,468 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 06:44:46,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:44:46,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1685451407, now seen corresponding path program 1 times [2023-08-30 06:44:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:46,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395286744] [2023-08-30 06:44:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:46,469 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 06:44:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:46,470 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 06:44:46,471 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 06:44:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:44:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:46,581 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 06:44:46,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:46,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395286744] [2023-08-30 06:44:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395286744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:46,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:46,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:44:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581187982] [2023-08-30 06:44:46,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:46,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:44:46,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 413 [2023-08-30 06:44:46,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 912 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:46,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:46,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 413 [2023-08-30 06:44:46,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:47,552 INFO L130 PetriNetUnfolder]: 4204/7900 cut-off events. [2023-08-30 06:44:47,552 INFO L131 PetriNetUnfolder]: For 4441/4537 co-relation queries the response was YES. [2023-08-30 06:44:47,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20548 conditions, 7900 events. 4204/7900 cut-off events. For 4441/4537 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 67289 event pairs, 3440 based on Foata normal form. 0/7268 useless extension candidates. Maximal degree in co-relation 20515. Up to 7669 conditions per place. [2023-08-30 06:44:47,588 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 51 selfloop transitions, 42 changer transitions 0/95 dead transitions. [2023-08-30 06:44:47,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 1096 flow [2023-08-30 06:44:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:44:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:44:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-08-30 06:44:47,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423728813559322 [2023-08-30 06:44:47,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-08-30 06:44:47,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-08-30 06:44:47,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:47,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-08-30 06:44:47,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:47,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:47,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:47,596 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 912 flow. Second operand 4 states and 700 transitions. [2023-08-30 06:44:47,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 1096 flow [2023-08-30 06:44:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 1077 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 06:44:47,609 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 975 flow [2023-08-30 06:44:47,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=975, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-08-30 06:44:47,609 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-08-30 06:44:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 975 flow [2023-08-30 06:44:47,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:47,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:47,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:47,623 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 06:44:47,820 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 06:44:47,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:44:47,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1685344759, now seen corresponding path program 1 times [2023-08-30 06:44:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982706152] [2023-08-30 06:44:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:47,822 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 06:44:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:47,822 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 06:44:47,823 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 06:44:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 06:44:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:47,928 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:44:48,064 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 06:44:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:48,569 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 06:44:48,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:48,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982706152] [2023-08-30 06:44:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982706152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:48,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:44:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44036301] [2023-08-30 06:44:48,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:48,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:44:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:44:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:44:50,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 06:44:50,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 975 flow. Second operand has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:50,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:50,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 06:44:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:53,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:44:54,642 INFO L130 PetriNetUnfolder]: 8420/15284 cut-off events. [2023-08-30 06:44:54,643 INFO L131 PetriNetUnfolder]: For 6693/6789 co-relation queries the response was YES. [2023-08-30 06:44:54,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40037 conditions, 15284 events. 8420/15284 cut-off events. For 6693/6789 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 136362 event pairs, 928 based on Foata normal form. 768/14972 useless extension candidates. Maximal degree in co-relation 40003. Up to 4336 conditions per place. [2023-08-30 06:44:54,727 INFO L137 encePairwiseOnDemand]: 404/413 looper letters, 95 selfloop transitions, 53 changer transitions 0/150 dead transitions. [2023-08-30 06:44:54,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 150 transitions, 1467 flow [2023-08-30 06:44:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:44:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:44:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-30 06:44:54,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067796610169492 [2023-08-30 06:44:54,733 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-30 06:44:54,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-30 06:44:54,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:54,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-30 06:44:54,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:54,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:54,740 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 413.0) internal successors, (3717), 9 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:54,740 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 975 flow. Second operand 8 states and 1344 transitions. [2023-08-30 06:44:54,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 150 transitions, 1467 flow [2023-08-30 06:44:54,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 1383 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:44:54,759 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 1092 flow [2023-08-30 06:44:54,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2023-08-30 06:44:54,760 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2023-08-30 06:44:54,760 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 1092 flow [2023-08-30 06:44:54,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:54,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:54,761 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:54,777 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 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:44:54,970 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 06:44:54,970 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:44:54,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:54,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1188910439, now seen corresponding path program 2 times [2023-08-30 06:44:54,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:54,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489337570] [2023-08-30 06:44:54,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:44:54,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:44:54,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:54,973 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 06:44:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:44:55,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:44:55,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:44:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:44:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:55,163 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:44:55,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:44:55,232 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:44:55,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:44:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:44:55,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:44:55,353 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:44:55,354 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 13 treesize of output 13 [2023-08-30 06:44:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:44:55,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:44:55,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489337570] [2023-08-30 06:44:55,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489337570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:44:55,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:44:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:44:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391248897] [2023-08-30 06:44:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:44:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:44:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:44:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:44:55,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 413 [2023-08-30 06:44:55,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 1092 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:55,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:55,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 413 [2023-08-30 06:44:55,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:44:57,425 INFO L130 PetriNetUnfolder]: 7252/13364 cut-off events. [2023-08-30 06:44:57,425 INFO L131 PetriNetUnfolder]: For 14392/14488 co-relation queries the response was YES. [2023-08-30 06:44:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40650 conditions, 13364 events. 7252/13364 cut-off events. For 14392/14488 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 119563 event pairs, 5936 based on Foata normal form. 736/13756 useless extension candidates. Maximal degree in co-relation 40611. Up to 13239 conditions per place. [2023-08-30 06:44:57,523 INFO L137 encePairwiseOnDemand]: 409/413 looper letters, 85 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2023-08-30 06:44:57,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 99 transitions, 1256 flow [2023-08-30 06:44:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:44:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:44:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 671 transitions. [2023-08-30 06:44:57,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40617433414043586 [2023-08-30 06:44:57,525 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 671 transitions. [2023-08-30 06:44:57,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 671 transitions. [2023-08-30 06:44:57,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:44:57,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 671 transitions. [2023-08-30 06:44:57,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,528 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 413.0) internal successors, (2065), 5 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,528 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 1092 flow. Second operand 4 states and 671 transitions. [2023-08-30 06:44:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 99 transitions, 1256 flow [2023-08-30 06:44:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 99 transitions, 1151 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 06:44:57,593 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 981 flow [2023-08-30 06:44:57,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=981, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2023-08-30 06:44:57,594 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2023-08-30 06:44:57,594 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 981 flow [2023-08-30 06:44:57,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:57,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:44:57,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:44:57,605 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 06:44:57,804 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 06:44:57,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:44:57,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:44:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -944515027, now seen corresponding path program 1 times [2023-08-30 06:44:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:44:57,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673778723] [2023-08-30 06:44:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:44:57,806 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 06:44:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:44:57,807 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 06:44:57,808 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 06:44:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:44:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 06:44:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:44:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:44:57,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:44:58,024 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 11 treesize of output 9 [2023-08-30 06:44:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:44:58,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:44:58,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673778723] [2023-08-30 06:44:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673778723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:44:58,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:44:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:44:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510071969] [2023-08-30 06:44:58,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:44:58,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:44:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:44:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:44:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:44:59,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 413 [2023-08-30 06:44:59,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 981 flow. Second operand has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:44:59,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:44:59,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 413 [2023-08-30 06:44:59,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:01,982 INFO L130 PetriNetUnfolder]: 6740/12756 cut-off events. [2023-08-30 06:45:01,983 INFO L131 PetriNetUnfolder]: For 7860/7932 co-relation queries the response was YES. [2023-08-30 06:45:02,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38153 conditions, 12756 events. 6740/12756 cut-off events. For 7860/7932 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 114381 event pairs, 752 based on Foata normal form. 576/13044 useless extension candidates. Maximal degree in co-relation 38115. Up to 2161 conditions per place. [2023-08-30 06:45:02,078 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 111 selfloop transitions, 43 changer transitions 0/156 dead transitions. [2023-08-30 06:45:02,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1446 flow [2023-08-30 06:45:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:45:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:45:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1693 transitions. [2023-08-30 06:45:02,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099273607748184 [2023-08-30 06:45:02,082 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1693 transitions. [2023-08-30 06:45:02,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1693 transitions. [2023-08-30 06:45:02,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:02,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1693 transitions. [2023-08-30 06:45:02,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,089 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,089 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 981 flow. Second operand 10 states and 1693 transitions. [2023-08-30 06:45:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1446 flow [2023-08-30 06:45:02,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 156 transitions, 1421 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 06:45:02,163 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 1050 flow [2023-08-30 06:45:02,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1050, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-08-30 06:45:02,163 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2023-08-30 06:45:02,164 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 1050 flow [2023-08-30 06:45:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.66666666666666) internal successors, (1940), 12 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:02,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:02,164 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-08-30 06:45:02,177 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 06:45:02,377 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 06:45:02,378 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:45:02,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1765179930, now seen corresponding path program 1 times [2023-08-30 06:45:02,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:02,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492183399] [2023-08-30 06:45:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:45:02,379 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 06:45:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:02,380 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 06:45:02,381 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 06:45:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:45:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:45:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:02,484 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:45:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:02,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:45:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:04,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:45:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492183399] [2023-08-30 06:45:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492183399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:45:04,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:45:04,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-30 06:45:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911724662] [2023-08-30 06:45:04,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:45:04,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 06:45:04,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:45:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 06:45:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-08-30 06:45:16,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 06:45:16,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 1050 flow. Second operand has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:16,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:45:16,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 06:45:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:45:21,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:23,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:25,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:27,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:29,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:31,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:33,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:35,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:37,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:39,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:42,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:45,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:47,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:50,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:45:57,182 INFO L130 PetriNetUnfolder]: 13516/25590 cut-off events. [2023-08-30 06:45:57,183 INFO L131 PetriNetUnfolder]: For 20788/20794 co-relation queries the response was YES. [2023-08-30 06:45:57,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79472 conditions, 25590 events. 13516/25590 cut-off events. For 20788/20794 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 243753 event pairs, 11328 based on Foata normal form. 38/25608 useless extension candidates. Maximal degree in co-relation 79434. Up to 4321 conditions per place. [2023-08-30 06:45:57,365 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 509 selfloop transitions, 64 changer transitions 0/575 dead transitions. [2023-08-30 06:45:57,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 575 transitions, 5244 flow [2023-08-30 06:45:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 06:45:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 06:45:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4660 transitions. [2023-08-30 06:45:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178997399336382 [2023-08-30 06:45:57,373 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4660 transitions. [2023-08-30 06:45:57,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4660 transitions. [2023-08-30 06:45:57,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:45:57,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4660 transitions. [2023-08-30 06:45:57,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 172.59259259259258) internal successors, (4660), 27 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,390 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,391 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 1050 flow. Second operand 27 states and 4660 transitions. [2023-08-30 06:45:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 575 transitions, 5244 flow [2023-08-30 06:45:57,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 575 transitions, 4788 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-08-30 06:45:57,629 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1490 flow [2023-08-30 06:45:57,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1490, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2023-08-30 06:45:57,630 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2023-08-30 06:45:57,630 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1490 flow [2023-08-30 06:45:57,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 160.05) internal successors, (3201), 20 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:45:57,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:45:57,631 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-08-30 06:45:57,641 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 06:45:57,841 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 06:45:57,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:45:57,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:45:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash 334852129, now seen corresponding path program 3 times [2023-08-30 06:45:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:45:57,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219102169] [2023-08-30 06:45:57,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:45:57,842 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 06:45:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:45:57,843 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 06:45:57,845 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 06:45:58,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 06:45:58,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:45:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 06:45:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:45:58,112 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:45:58,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:45:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:45:58,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:46:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:46:01,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:46:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219102169] [2023-08-30 06:46:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219102169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:46:01,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:46:01,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-08-30 06:46:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069579136] [2023-08-30 06:46:01,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:46:01,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 06:46:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:46:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 06:46:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-08-30 06:46:27,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 06:46:27,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1490 flow. Second operand has 26 states, 26 states have (on average 160.0) internal successors, (4160), 26 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:46:27,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:46:27,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 06:46:27,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:46:37,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:39,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:40,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:42,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:44,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:46,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:48,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:50,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:52,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:54,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:46:56,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:47:12,542 INFO L130 PetriNetUnfolder]: 13522/25596 cut-off events. [2023-08-30 06:47:12,542 INFO L131 PetriNetUnfolder]: For 13598/13598 co-relation queries the response was YES. [2023-08-30 06:47:12,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74781 conditions, 25596 events. 13522/25596 cut-off events. For 13598/13598 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 242561 event pairs, 11328 based on Foata normal form. 12/25114 useless extension candidates. Maximal degree in co-relation 74732. Up to 6289 conditions per place. [2023-08-30 06:47:12,752 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 411 selfloop transitions, 78 changer transitions 0/491 dead transitions. [2023-08-30 06:47:12,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 491 transitions, 4418 flow [2023-08-30 06:47:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 06:47:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 06:47:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4449 transitions. [2023-08-30 06:47:12,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143229651704228 [2023-08-30 06:47:12,758 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4449 transitions. [2023-08-30 06:47:12,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4449 transitions. [2023-08-30 06:47:12,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:12,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4449 transitions. [2023-08-30 06:47:12,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.1153846153846) internal successors, (4449), 26 states have internal predecessors, (4449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:12,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:12,768 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:12,768 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1490 flow. Second operand 26 states and 4449 transitions. [2023-08-30 06:47:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 491 transitions, 4418 flow [2023-08-30 06:47:12,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 491 transitions, 4273 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-08-30 06:47:12,988 INFO L231 Difference]: Finished difference. Result has 162 places, 149 transitions, 1867 flow [2023-08-30 06:47:12,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1867, PETRI_PLACES=162, PETRI_TRANSITIONS=149} [2023-08-30 06:47:12,989 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2023-08-30 06:47:12,989 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 149 transitions, 1867 flow [2023-08-30 06:47:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 160.0) internal successors, (4160), 26 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:12,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:12,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:12,999 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 06:47:13,195 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 06:47:13,196 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:47:13,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1635547502, now seen corresponding path program 2 times [2023-08-30 06:47:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161151197] [2023-08-30 06:47:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:13,197 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 06:47:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:13,198 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 06:47:13,202 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 06:47:13,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:47:13,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:47:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:13,454 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:47:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:13,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:47:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:47:15,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161151197] [2023-08-30 06:47:15,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161151197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:47:15,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:47:15,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-08-30 06:47:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14100996] [2023-08-30 06:47:15,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:47:15,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:47:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:47:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:47:25,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 413 [2023-08-30 06:47:25,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 149 transitions, 1867 flow. Second operand has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:25,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:25,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 413 [2023-08-30 06:47:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:30,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:47:37,375 INFO L130 PetriNetUnfolder]: 13220/25032 cut-off events. [2023-08-30 06:47:37,375 INFO L131 PetriNetUnfolder]: For 10973/10973 co-relation queries the response was YES. [2023-08-30 06:47:37,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73369 conditions, 25032 events. 13220/25032 cut-off events. For 10973/10973 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 237173 event pairs, 1504 based on Foata normal form. 90/24612 useless extension candidates. Maximal degree in co-relation 73306. Up to 8900 conditions per place. [2023-08-30 06:47:37,616 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 167 selfloop transitions, 107 changer transitions 0/276 dead transitions. [2023-08-30 06:47:37,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 276 transitions, 2823 flow [2023-08-30 06:47:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 06:47:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 06:47:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3174 transitions. [2023-08-30 06:47:37,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842615012106538 [2023-08-30 06:47:37,619 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3174 transitions. [2023-08-30 06:47:37,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3174 transitions. [2023-08-30 06:47:37,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:37,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3174 transitions. [2023-08-30 06:47:37,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,629 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,629 INFO L175 Difference]: Start difference. First operand has 162 places, 149 transitions, 1867 flow. Second operand 20 states and 3174 transitions. [2023-08-30 06:47:37,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 276 transitions, 2823 flow [2023-08-30 06:47:37,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 276 transitions, 2672 flow, removed 23 selfloop flow, removed 17 redundant places. [2023-08-30 06:47:37,871 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 2041 flow [2023-08-30 06:47:37,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2041, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2023-08-30 06:47:37,871 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2023-08-30 06:47:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 2041 flow [2023-08-30 06:47:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 151.55555555555554) internal successors, (2728), 18 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:37,886 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 06:47:38,083 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 06:47:38,083 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:47:38,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1883482390, now seen corresponding path program 1 times [2023-08-30 06:47:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:38,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142442314] [2023-08-30 06:47:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:47:38,084 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 06:47:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:38,085 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 06:47:38,086 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 06:47:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:47:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:47:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:47:38,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:38,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142442314] [2023-08-30 06:47:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142442314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:38,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:38,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:47:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126526229] [2023-08-30 06:47:38,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:38,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:47:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:47:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:47:38,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 413 [2023-08-30 06:47:38,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 2041 flow. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:38,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:38,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 413 [2023-08-30 06:47:38,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:45,256 INFO L130 PetriNetUnfolder]: 27868/47822 cut-off events. [2023-08-30 06:47:45,256 INFO L131 PetriNetUnfolder]: For 42335/42335 co-relation queries the response was YES. [2023-08-30 06:47:45,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149614 conditions, 47822 events. 27868/47822 cut-off events. For 42335/42335 co-relation queries the response was YES. Maximal size of possible extension queue 1354. Compared 405151 event pairs, 7232 based on Foata normal form. 2892/50714 useless extension candidates. Maximal degree in co-relation 149548. Up to 19481 conditions per place. [2023-08-30 06:47:45,878 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 151 selfloop transitions, 58 changer transitions 0/209 dead transitions. [2023-08-30 06:47:45,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 209 transitions, 2758 flow [2023-08-30 06:47:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:47:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:47:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-08-30 06:47:45,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43341404358353514 [2023-08-30 06:47:45,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-08-30 06:47:45,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-08-30 06:47:45,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:45,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-08-30 06:47:45,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:45,883 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 2041 flow. Second operand 5 states and 895 transitions. [2023-08-30 06:47:45,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 209 transitions, 2758 flow [2023-08-30 06:47:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 209 transitions, 2503 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-08-30 06:47:47,331 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2249 flow [2023-08-30 06:47:47,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2249, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2023-08-30 06:47:47,332 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 112 predicate places. [2023-08-30 06:47:47,332 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2249 flow [2023-08-30 06:47:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:47,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:47,332 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1] [2023-08-30 06:47:47,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:47,534 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 06:47:47,536 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:47:47,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1052899988, now seen corresponding path program 3 times [2023-08-30 06:47:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:47,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116028204] [2023-08-30 06:47:47,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:47:47,537 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 06:47:47,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:47,538 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 06:47:47,539 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 06:47:47,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:47:47,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:47:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:47:47,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-08-30 06:47:47,958 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 51 treesize of output 19 [2023-08-30 06:47:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-30 06:47:47,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:47,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116028204] [2023-08-30 06:47:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116028204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:47,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:47:47,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616209953] [2023-08-30 06:47:47,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:47,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:47:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:47:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:47:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 413 [2023-08-30 06:47:48,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2249 flow. Second operand has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:48,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:48,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 413 [2023-08-30 06:47:48,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:47:55,493 INFO L130 PetriNetUnfolder]: 20756/38482 cut-off events. [2023-08-30 06:47:55,494 INFO L131 PetriNetUnfolder]: For 72236/72812 co-relation queries the response was YES. [2023-08-30 06:47:55,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148432 conditions, 38482 events. 20756/38482 cut-off events. For 72236/72812 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 351612 event pairs, 1994 based on Foata normal form. 1026/39208 useless extension candidates. Maximal degree in co-relation 148368. Up to 30534 conditions per place. [2023-08-30 06:47:56,017 INFO L137 encePairwiseOnDemand]: 406/413 looper letters, 143 selfloop transitions, 63 changer transitions 0/211 dead transitions. [2023-08-30 06:47:56,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 211 transitions, 2745 flow [2023-08-30 06:47:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:47:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:47:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-08-30 06:47:56,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983050847457627 [2023-08-30 06:47:56,020 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-08-30 06:47:56,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-08-30 06:47:56,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:47:56,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-08-30 06:47:56,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:56,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:56,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:56,022 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2249 flow. Second operand 6 states and 987 transitions. [2023-08-30 06:47:56,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 211 transitions, 2745 flow [2023-08-30 06:47:57,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 2743 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 06:47:57,136 INFO L231 Difference]: Finished difference. Result has 170 places, 201 transitions, 2486 flow [2023-08-30 06:47:57,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2486, PETRI_PLACES=170, PETRI_TRANSITIONS=201} [2023-08-30 06:47:57,136 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2023-08-30 06:47:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 201 transitions, 2486 flow [2023-08-30 06:47:57,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:57,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:47:57,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:47:57,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 06:47:57,341 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 06:47:57,341 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:47:57,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:47:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 177946782, now seen corresponding path program 2 times [2023-08-30 06:47:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:47:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828613220] [2023-08-30 06:47:57,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:47:57,342 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 06:47:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:47:57,343 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 06:47:57,345 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 06:47:57,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:47:57,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:47:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:47:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:47:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:47:57,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:47:57,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:47:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828613220] [2023-08-30 06:47:57,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828613220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:47:57,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:47:57,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:47:57,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466475097] [2023-08-30 06:47:57,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:47:57,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:47:57,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:47:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:47:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:47:57,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 413 [2023-08-30 06:47:57,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 201 transitions, 2486 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:47:57,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:47:57,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 413 [2023-08-30 06:47:57,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:06,364 INFO L130 PetriNetUnfolder]: 31538/55998 cut-off events. [2023-08-30 06:48:06,365 INFO L131 PetriNetUnfolder]: For 166997/167603 co-relation queries the response was YES. [2023-08-30 06:48:07,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224530 conditions, 55998 events. 31538/55998 cut-off events. For 166997/167603 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 511266 event pairs, 9039 based on Foata normal form. 838/56581 useless extension candidates. Maximal degree in co-relation 224461. Up to 26992 conditions per place. [2023-08-30 06:48:07,329 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 259 selfloop transitions, 2 changer transitions 1/267 dead transitions. [2023-08-30 06:48:07,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 267 transitions, 3738 flow [2023-08-30 06:48:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:48:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:48:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 06:48:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-08-30 06:48:07,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 06:48:07,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 06:48:07,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:48:07,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 06:48:07,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:07,333 INFO L175 Difference]: Start difference. First operand has 170 places, 201 transitions, 2486 flow. Second operand 3 states and 560 transitions. [2023-08-30 06:48:07,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 267 transitions, 3738 flow [2023-08-30 06:48:09,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 267 transitions, 3736 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 06:48:09,541 INFO L231 Difference]: Finished difference. Result has 173 places, 202 transitions, 2498 flow [2023-08-30 06:48:09,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2498, PETRI_PLACES=173, PETRI_TRANSITIONS=202} [2023-08-30 06:48:09,541 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2023-08-30 06:48:09,542 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 202 transitions, 2498 flow [2023-08-30 06:48:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:09,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:48:09,542 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 06:48:09,549 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 06:48:09,742 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 06:48:09,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:48:09,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:48:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1152749730, now seen corresponding path program 1 times [2023-08-30 06:48:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:48:09,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025109716] [2023-08-30 06:48:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:48:09,744 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 06:48:09,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:48:09,745 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 06:48:09,746 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 06:48:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:48:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:48:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:48:09,895 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:48:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:48:10,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:48:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:48:12,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:48:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025109716] [2023-08-30 06:48:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025109716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:48:12,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:48:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:48:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629473294] [2023-08-30 06:48:12,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:48:12,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:48:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:48:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:48:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-30 06:48:21,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 413 [2023-08-30 06:48:21,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 202 transitions, 2498 flow. Second operand has 18 states, 18 states have (on average 157.66666666666666) internal successors, (2838), 18 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:48:21,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:48:21,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 413 [2023-08-30 06:48:21,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:48:30,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:32,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:38,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:40,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:41,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:43,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:45,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:48:50,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:48:53,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:48:57,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:49:00,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:49:02,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:49:05,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:49:07,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:49:28,893 INFO L130 PetriNetUnfolder]: 93786/161959 cut-off events. [2023-08-30 06:49:28,893 INFO L131 PetriNetUnfolder]: For 372283/376597 co-relation queries the response was YES. [2023-08-30 06:49:31,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704055 conditions, 161959 events. 93786/161959 cut-off events. For 372283/376597 co-relation queries the response was YES. Maximal size of possible extension queue 3618. Compared 1567844 event pairs, 5142 based on Foata normal form. 10269/171394 useless extension candidates. Maximal degree in co-relation 703983. Up to 35185 conditions per place. [2023-08-30 06:49:32,078 INFO L137 encePairwiseOnDemand]: 405/413 looper letters, 309 selfloop transitions, 168 changer transitions 0/482 dead transitions. [2023-08-30 06:49:32,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 482 transitions, 5262 flow [2023-08-30 06:49:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 06:49:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 06:49:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4636 transitions. [2023-08-30 06:49:32,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40089934278796263 [2023-08-30 06:49:32,087 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4636 transitions. [2023-08-30 06:49:32,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4636 transitions. [2023-08-30 06:49:32,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:49:32,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4636 transitions. [2023-08-30 06:49:32,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 165.57142857142858) internal successors, (4636), 28 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:32,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:32,103 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 413.0) internal successors, (11977), 29 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:32,103 INFO L175 Difference]: Start difference. First operand has 173 places, 202 transitions, 2498 flow. Second operand 28 states and 4636 transitions. [2023-08-30 06:49:32,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 482 transitions, 5262 flow [2023-08-30 06:49:37,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 482 transitions, 5236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:49:37,038 INFO L231 Difference]: Finished difference. Result has 206 places, 269 transitions, 3742 flow [2023-08-30 06:49:37,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3742, PETRI_PLACES=206, PETRI_TRANSITIONS=269} [2023-08-30 06:49:37,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 156 predicate places. [2023-08-30 06:49:37,039 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 269 transitions, 3742 flow [2023-08-30 06:49:37,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.66666666666666) internal successors, (2838), 18 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:37,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:49:37,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:49:37,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 06:49:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:49:37,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:49:37,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:49:37,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1110539665, now seen corresponding path program 1 times [2023-08-30 06:49:37,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:49:37,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527833614] [2023-08-30 06:49:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:49:37,241 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 06:49:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:49:37,242 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:49:37,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 06:49:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:49:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:49:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:49:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:49:37,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:49:37,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:49:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527833614] [2023-08-30 06:49:37,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527833614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:49:37,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:49:37,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:49:37,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956109936] [2023-08-30 06:49:37,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:49:37,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:49:37,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:49:37,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:49:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:49:37,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 413 [2023-08-30 06:49:37,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 269 transitions, 3742 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:49:37,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:49:37,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 413 [2023-08-30 06:49:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:50:13,623 INFO L130 PetriNetUnfolder]: 106509/189088 cut-off events. [2023-08-30 06:50:13,623 INFO L131 PetriNetUnfolder]: For 751696/754666 co-relation queries the response was YES. [2023-08-30 06:50:16,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905864 conditions, 189088 events. 106509/189088 cut-off events. For 751696/754666 co-relation queries the response was YES. Maximal size of possible extension queue 4466. Compared 1935796 event pairs, 34386 based on Foata normal form. 9066/197854 useless extension candidates. Maximal degree in co-relation 905784. Up to 141991 conditions per place. [2023-08-30 06:50:17,536 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 328 selfloop transitions, 4 changer transitions 4/341 dead transitions. [2023-08-30 06:50:17,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 341 transitions, 5349 flow [2023-08-30 06:50:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:50:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:50:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-30 06:50:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487489911218725 [2023-08-30 06:50:17,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-30 06:50:17,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-30 06:50:17,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:50:17,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-30 06:50:17,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:50:17,540 INFO L175 Difference]: Start difference. First operand has 206 places, 269 transitions, 3742 flow. Second operand 3 states and 556 transitions. [2023-08-30 06:50:17,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 341 transitions, 5349 flow [2023-08-30 06:51:03,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 341 transitions, 5090 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 06:51:03,108 INFO L231 Difference]: Finished difference. Result has 204 places, 268 transitions, 3504 flow [2023-08-30 06:51:03,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3504, PETRI_PLACES=204, PETRI_TRANSITIONS=268} [2023-08-30 06:51:03,109 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2023-08-30 06:51:03,109 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 268 transitions, 3504 flow [2023-08-30 06:51:03,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:51:03,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:51:03,110 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 1, 1, 1] [2023-08-30 06:51:03,117 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 (27)] Forceful destruction successful, exit code 0 [2023-08-30 06:51:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:51:03,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 06:51:03,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:51:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -60607878, now seen corresponding path program 2 times [2023-08-30 06:51:03,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:51:03,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004086596] [2023-08-30 06:51:03,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:51:03,311 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 06:51:03,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:51:03,312 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:51:03,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 06:51:03,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:51:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:51:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 06:51:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:51:03,488 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:51:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:51:04,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:51:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:51:11,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:51:11,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004086596] [2023-08-30 06:51:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004086596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:51:11,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:51:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-08-30 06:51:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929918613] [2023-08-30 06:51:11,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:51:11,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 06:51:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:51:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 06:51:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 06:52:15,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 413 [2023-08-30 06:52:15,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 268 transitions, 3504 flow. Second operand has 40 states, 40 states have (on average 160.025) internal successors, (6401), 40 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:52:15,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:52:15,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 413 [2023-08-30 06:52:15,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:52:37,875 WARN L222 SmtUtils]: Spent 14.19s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:52:40,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:42,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:44,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:46,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:48,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:50,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:52,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:54,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:56,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:52:58,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:00,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:02,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:04,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:06,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:08,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:10,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:12,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:14,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:53:24,044 WARN L222 SmtUtils]: Spent 7.85s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:53:35,311 WARN L222 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 06:53:43,344 WARN L222 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)