./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:16:27,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:16:27,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:16:27,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:16:27,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:16:27,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:16:27,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:16:27,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:16:27,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:16:27,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:16:27,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:16:27,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:16:27,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:16:27,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:16:27,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:16:27,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:16:27,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:16:27,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:16:27,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:16:27,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:16:27,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:16:27,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:16:27,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:16:27,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:16:27,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:16:27,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:16:27,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:16:27,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:16:27,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:16:27,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:16:27,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:16:27,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:16:27,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:16:27,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:16:27,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:16:27,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:16:27,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:16:27,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:16:27,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:16:27,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:16:27,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:16:27,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:16:27,942 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:16:27,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:16:27,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:16:27,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:16:27,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:16:27,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:16:27,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:16:27,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:16:27,946 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:16:27,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:16:27,947 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:16:27,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:16:27,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:16:27,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:16:27,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:16:27,948 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:16:27,949 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:16:27,949 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:16:27,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:16:27,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:16:27,949 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:16:27,950 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:16:27,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:16:27,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:16:27,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:16:27,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:16:27,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:16:27,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:16:27,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:16:27,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:16:27,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:16:27,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:16:27,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:16:27,953 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:16:27,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:16:28,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:16:28,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:16:28,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:16:28,306 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:16:28,307 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:16:28,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 02:16:29,574 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:16:29,772 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:16:29,772 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 02:16:29,780 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b9ed45b/6387e3414e1e4bbc9ce211088a10df47/FLAGd07709f60 [2023-09-01 02:16:29,795 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b9ed45b/6387e3414e1e4bbc9ce211088a10df47 [2023-09-01 02:16:29,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:16:29,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:16:29,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:16:29,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:16:29,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:16:29,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:29" (1/1) ... [2023-09-01 02:16:29,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29761edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:29, skipping insertion in model container [2023-09-01 02:16:29,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:29" (1/1) ... [2023-09-01 02:16:29,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:16:29,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:16:29,979 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 02:16:29,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:16:29,996 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:16:29,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4316fe5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:29, skipping insertion in model container [2023-09-01 02:16:29,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:16:29,997 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:16:29,999 INFO L158 Benchmark]: Toolchain (without parser) took 198.44ms. Allocated memory is still 73.4MB. Free memory was 48.2MB in the beginning and 38.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:16:29,999 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 34.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:16:30,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.50ms. Allocated memory is still 73.4MB. Free memory was 48.0MB in the beginning and 38.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 02:16:30,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory is still 34.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.50ms. Allocated memory is still 73.4MB. Free memory was 48.0MB in the beginning and 38.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:16:31,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:16:31,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:16:31,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:16:31,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:16:31,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:16:31,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:16:31,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:16:31,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:16:31,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:16:31,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:16:31,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:16:31,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:16:31,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:16:31,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:16:31,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:16:31,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:16:31,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:16:31,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:16:31,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:16:31,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:16:31,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:16:31,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:16:31,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:16:31,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:16:31,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:16:31,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:16:31,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:16:31,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:16:31,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:16:31,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:16:31,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:16:31,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:16:31,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:16:31,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:16:31,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:16:31,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:16:31,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:16:31,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:16:31,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:16:31,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:16:31,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:16:31,789 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:16:31,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:16:31,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:16:31,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:16:31,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:16:31,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:16:31,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:16:31,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:16:31,793 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:16:31,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:16:31,794 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:16:31,795 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:16:31,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:16:31,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:16:31,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:16:31,795 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:16:31,796 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:16:31,796 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:16:31,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:16:31,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:16:31,796 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:16:31,797 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:16:31,797 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:16:31,797 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:16:31,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:16:31,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:16:31,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:16:31,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:16:31,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:16:31,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:16:31,798 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:16:31,799 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:16:31,799 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:16:31,799 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:16:31,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:16:31,799 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:16:31,800 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:16:31,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:16:32,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:16:32,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:16:32,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:16:32,152 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:16:32,152 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:16:32,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 02:16:33,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:16:33,415 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:16:33,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-09-01 02:16:33,421 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2daa1890f/4917f3469b6844c4aee8715c58a6f7e7/FLAG5832f581b [2023-09-01 02:16:33,433 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2daa1890f/4917f3469b6844c4aee8715c58a6f7e7 [2023-09-01 02:16:33,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:16:33,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:16:33,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:16:33,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:16:33,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:16:33,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33, skipping insertion in model container [2023-09-01 02:16:33,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:16:33,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:16:33,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 02:16:33,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:16:33,729 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:16:33,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:16:33,755 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 02:16:33,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:16:33,778 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:16:33,811 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c[3057,3070] [2023-09-01 02:16:33,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:16:33,834 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:16:33,835 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:16:33,841 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:16:33,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33 WrapperNode [2023-09-01 02:16:33,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:16:33,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:16:33,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:16:33,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:16:33,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,898 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2023-09-01 02:16:33,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:16:33,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:16:33,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:16:33,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:16:33,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:16:33,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:16:33,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:16:33,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:16:33,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (1/1) ... [2023-09-01 02:16:33,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:16:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:16:33,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:16:34,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:16:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:16:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:16:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:16:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:16:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:16:34,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:16:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:16:34,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:16:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:16:34,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:16:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:16:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:16:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:16:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:16:34,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:16:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:16:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:16:34,039 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:16:34,151 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:16:34,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:16:34,721 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:16:34,835 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:16:34,835 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 02:16:34,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:16:34 BoogieIcfgContainer [2023-09-01 02:16:34,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:16:34,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:16:34,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:16:34,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:16:34,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:16:33" (1/3) ... [2023-09-01 02:16:34,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccaf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:16:34, skipping insertion in model container [2023-09-01 02:16:34,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:16:33" (2/3) ... [2023-09-01 02:16:34,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccaf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:16:34, skipping insertion in model container [2023-09-01 02:16:34,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:16:34" (3/3) ... [2023-09-01 02:16:34,847 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-09-01 02:16:34,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:16:34,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 02:16:34,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:16:34,972 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 02:16:35,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 197 transitions, 418 flow [2023-09-01 02:16:35,106 INFO L130 PetriNetUnfolder]: 12/194 cut-off events. [2023-09-01 02:16:35,107 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:16:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 12/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 225 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-09-01 02:16:35,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 197 transitions, 418 flow [2023-09-01 02:16:35,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 398 flow [2023-09-01 02:16:35,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:16:35,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 398 flow [2023-09-01 02:16:35,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 398 flow [2023-09-01 02:16:35,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 398 flow [2023-09-01 02:16:35,190 INFO L130 PetriNetUnfolder]: 12/190 cut-off events. [2023-09-01 02:16:35,190 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:16:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 190 events. 12/190 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 225 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 156. Up to 2 conditions per place. [2023-09-01 02:16:35,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2023-09-01 02:16:54,696 INFO L134 LiptonReduction]: Checked pairs total: 4273 [2023-09-01 02:16:54,696 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-09-01 02:16:54,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:16:54,737 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;@58a9e08c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:16:54,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-09-01 02:16:54,742 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:16:54,742 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:16:54,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:54,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:16:54,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:16:54,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-09-01 02:16:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:16:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137925405] [2023-09-01 02:16:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:16:54,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:16:54,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:16:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:16:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:16:55,100 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:16:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:16:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:55,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:16:55,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:16:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137925405] [2023-09-01 02:16:55,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137925405] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:55,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:16:55,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67420769] [2023-09-01 02:16:55,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:55,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:16:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:16:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:16:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:16:55,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 397 [2023-09-01 02:16:55,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:55,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:55,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 397 [2023-09-01 02:16:55,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:56,045 INFO L130 PetriNetUnfolder]: 2075/3133 cut-off events. [2023-09-01 02:16:56,046 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 02:16:56,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 3133 events. 2075/3133 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14642 event pairs, 1762 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 2924. Up to 1561 conditions per place. [2023-09-01 02:16:56,070 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 83 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-09-01 02:16:56,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 384 flow [2023-09-01 02:16:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:16:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:16:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-09-01 02:16:56,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071368597816961 [2023-09-01 02:16:56,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-09-01 02:16:56,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-09-01 02:16:56,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:56,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-09-01 02:16:56,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,121 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 604 transitions. [2023-09-01 02:16:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 384 flow [2023-09-01 02:16:56,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 02:16:56,132 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 116 flow [2023-09-01 02:16:56,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-09-01 02:16:56,141 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-09-01 02:16:56,142 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 116 flow [2023-09-01 02:16:56,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:16:56,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-09-01 02:16:56,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:56,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:16:56,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-09-01 02:16:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:16:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506099714] [2023-09-01 02:16:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:16:56,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:16:56,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:16:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:16:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:16:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:56,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:16:56,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:16:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506099714] [2023-09-01 02:16:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506099714] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:56,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:56,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:16:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377664406] [2023-09-01 02:16:56,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:16:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:16:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:16:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:16:56,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 397 [2023-09-01 02:16:56,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:56,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 397 [2023-09-01 02:16:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:56,908 INFO L130 PetriNetUnfolder]: 1038/1570 cut-off events. [2023-09-01 02:16:56,908 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:16:56,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1570 events. 1038/1570 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6407 event pairs, 881 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 3172. Up to 1561 conditions per place. [2023-09-01 02:16:56,941 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-09-01 02:16:56,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 210 flow [2023-09-01 02:16:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:16:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:16:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-09-01 02:16:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019311502938704 [2023-09-01 02:16:56,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-09-01 02:16:56,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-09-01 02:16:56,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:56,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-09-01 02:16:56,946 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) [2023-09-01 02:16:56,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,949 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 116 flow. Second operand 3 states and 560 transitions. [2023-09-01 02:16:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 210 flow [2023-09-01 02:16:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:16:56,952 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2023-09-01 02:16:56,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-09-01 02:16:56,953 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-09-01 02:16:56,953 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2023-09-01 02:16:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:56,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:56,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:16:56,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 02:16:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:57,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:16:57,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash 24837, now seen corresponding path program 1 times [2023-09-01 02:16:57,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:16:57,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574292915] [2023-09-01 02:16:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:57,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:57,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:16:57,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:16:57,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:16:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:16:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:16:57,312 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 02:16:57,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 02:16:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:57,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:16:57,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:16:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574292915] [2023-09-01 02:16:57,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574292915] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:57,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:16:57,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780460962] [2023-09-01 02:16:57,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:57,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:16:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:16:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:16:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:16:57,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-09-01 02:16:57,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 128 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) [2023-09-01 02:16:57,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:57,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-09-01 02:16:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:57,722 INFO L130 PetriNetUnfolder]: 1038/1567 cut-off events. [2023-09-01 02:16:57,722 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:16:57,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1567 events. 1038/1567 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6401 event pairs, 881 based on Foata normal form. 2/837 useless extension candidates. Maximal degree in co-relation 3171. Up to 1559 conditions per place. [2023-09-01 02:16:57,729 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 42 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-09-01 02:16:57,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 208 flow [2023-09-01 02:16:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:16:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:16:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-09-01 02:16:57,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45759865659109994 [2023-09-01 02:16:57,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-09-01 02:16:57,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-09-01 02:16:57,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:57,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-09-01 02:16:57,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:57,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:57,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:57,737 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 3 states and 545 transitions. [2023-09-01 02:16:57,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 208 flow [2023-09-01 02:16:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 02:16:57,739 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 118 flow [2023-09-01 02:16:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-09-01 02:16:57,740 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-09-01 02:16:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 118 flow [2023-09-01 02:16:57,741 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) [2023-09-01 02:16:57,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:57,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:16:57,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:16:57,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:57,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:16:57,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash 772624, now seen corresponding path program 1 times [2023-09-01 02:16:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:16:57,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893042964] [2023-09-01 02:16:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:57,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:16:57,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:16:57,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:16:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:16:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:16:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:58,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:16:58,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-09-01 02:16:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:58,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:16:58,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893042964] [2023-09-01 02:16:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893042964] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:16:58,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:16:58,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:16:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500780005] [2023-09-01 02:16:58,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:16:58,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:16:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:16:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:16:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:16:58,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 397 [2023-09-01 02:16:58,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:58,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:58,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 397 [2023-09-01 02:16:58,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:59,298 INFO L130 PetriNetUnfolder]: 2075/3130 cut-off events. [2023-09-01 02:16:59,299 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 02:16:59,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6348 conditions, 3130 events. 2075/3130 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14717 event pairs, 1762 based on Foata normal form. 0/1668 useless extension candidates. Maximal degree in co-relation 6339. Up to 1557 conditions per place. [2023-09-01 02:16:59,314 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 79 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-09-01 02:16:59,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 374 flow [2023-09-01 02:16:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:16:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:16:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 909 transitions. [2023-09-01 02:16:59,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579345088161209 [2023-09-01 02:16:59,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 909 transitions. [2023-09-01 02:16:59,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 909 transitions. [2023-09-01 02:16:59,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:59,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 909 transitions. [2023-09-01 02:16:59,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.8) internal successors, (909), 5 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:59,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:59,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:59,325 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 5 states and 909 transitions. [2023-09-01 02:16:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 374 flow [2023-09-01 02:16:59,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:16:59,327 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 127 flow [2023-09-01 02:16:59,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-09-01 02:16:59,328 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-09-01 02:16:59,328 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 127 flow [2023-09-01 02:16:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:16:59,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:59,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:16:59,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 02:16:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:16:59,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:16:59,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash 772556, now seen corresponding path program 1 times [2023-09-01 02:16:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:16:59,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147108685] [2023-09-01 02:16:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:59,542 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 [2023-09-01 02:16:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:16:59,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:16:59,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:16:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:16:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:16:59,704 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:16:59,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:16:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:59,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:16:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:59,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:16:59,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147108685] [2023-09-01 02:16:59,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147108685] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:16:59,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:16:59,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:16:59,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064144481] [2023-09-01 02:16:59,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:16:59,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:16:59,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:16:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:16:59,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:17:00,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-09-01 02:17:00,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:00,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:00,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-09-01 02:17:00,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:01,365 INFO L130 PetriNetUnfolder]: 2081/3137 cut-off events. [2023-09-01 02:17:01,365 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 02:17:01,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6377 conditions, 3137 events. 2081/3137 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14600 event pairs, 1762 based on Foata normal form. 3/1676 useless extension candidates. Maximal degree in co-relation 6366. Up to 1561 conditions per place. [2023-09-01 02:17:01,385 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 78 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-09-01 02:17:01,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 429 flow [2023-09-01 02:17:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:17:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:17:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-09-01 02:17:01,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466834592779177 [2023-09-01 02:17:01,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-09-01 02:17:01,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-09-01 02:17:01,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:01,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-09-01 02:17:01,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:01,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:01,397 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:01,398 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 127 flow. Second operand 6 states and 1064 transitions. [2023-09-01 02:17:01,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 429 flow [2023-09-01 02:17:01,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 02:17:01,402 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 220 flow [2023-09-01 02:17:01,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-09-01 02:17:01,404 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-09-01 02:17:01,405 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 220 flow [2023-09-01 02:17:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:01,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:01,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:17:01,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:01,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:01,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:01,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 772645, now seen corresponding path program 1 times [2023-09-01 02:17:01,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:01,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137707606] [2023-09-01 02:17:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:01,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:01,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:01,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:17:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 02:17:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:01,788 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-09-01 02:17:01,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-09-01 02:17:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:01,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:01,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137707606] [2023-09-01 02:17:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137707606] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:01,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:01,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:17:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801304451] [2023-09-01 02:17:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-09-01 02:17:01,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 220 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) [2023-09-01 02:17:01,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:01,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-09-01 02:17:01,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:02,294 INFO L130 PetriNetUnfolder]: 1719/2629 cut-off events. [2023-09-01 02:17:02,295 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 02:17:02,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5387 conditions, 2629 events. 1719/2629 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12126 event pairs, 1450 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 5372. Up to 2613 conditions per place. [2023-09-01 02:17:02,308 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 02:17:02,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 288 flow [2023-09-01 02:17:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-09-01 02:17:02,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550797649034425 [2023-09-01 02:17:02,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-09-01 02:17:02,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-09-01 02:17:02,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:02,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-09-01 02:17:02,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:02,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:02,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:02,316 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 220 flow. Second operand 3 states and 542 transitions. [2023-09-01 02:17:02,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 288 flow [2023-09-01 02:17:02,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 262 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:02,319 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 170 flow [2023-09-01 02:17:02,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-09-01 02:17:02,321 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-09-01 02:17:02,322 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 170 flow [2023-09-01 02:17:02,322 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) [2023-09-01 02:17:02,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:02,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:17:02,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:02,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:02,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 772647, now seen corresponding path program 1 times [2023-09-01 02:17:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844050691] [2023-09-01 02:17:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:02,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:02,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:02,535 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:02,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:17:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:17:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:02,728 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-09-01 02:17:02,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-09-01 02:17:02,746 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:17:02,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:17:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:03,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:03,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:03,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844050691] [2023-09-01 02:17:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844050691] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:03,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:17:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850598069] [2023-09-01 02:17:03,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:03,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:17:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:17:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:17:03,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-09-01 02:17:03,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:03,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:03,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-09-01 02:17:03,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:04,654 INFO L130 PetriNetUnfolder]: 1537/2374 cut-off events. [2023-09-01 02:17:04,654 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 02:17:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 2374 events. 1537/2374 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10800 event pairs, 1294 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 4842. Up to 1303 conditions per place. [2023-09-01 02:17:04,663 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 70 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-09-01 02:17:04,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 394 flow [2023-09-01 02:17:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:17:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:17:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1189 transitions. [2023-09-01 02:17:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278517452320979 [2023-09-01 02:17:04,667 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1189 transitions. [2023-09-01 02:17:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1189 transitions. [2023-09-01 02:17:04,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:04,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1189 transitions. [2023-09-01 02:17:04,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.85714285714286) internal successors, (1189), 7 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:04,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 397.0) internal successors, (3176), 8 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:04,675 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 397.0) internal successors, (3176), 8 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:04,675 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 170 flow. Second operand 7 states and 1189 transitions. [2023-09-01 02:17:04,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 394 flow [2023-09-01 02:17:04,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:04,677 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 177 flow [2023-09-01 02:17:04,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=177, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-09-01 02:17:04,678 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2023-09-01 02:17:04,678 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 177 flow [2023-09-01 02:17:04,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:04,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:04,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:17:04,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:04,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:04,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:04,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash 742530172, now seen corresponding path program 1 times [2023-09-01 02:17:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408939892] [2023-09-01 02:17:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:04,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:04,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:04,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:17:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:04,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 02:17:04,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:04,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:04,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408939892] [2023-09-01 02:17:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408939892] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:04,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:04,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:17:04,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912911322] [2023-09-01 02:17:04,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:04,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-09-01 02:17:05,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:05,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-09-01 02:17:05,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:05,280 INFO L130 PetriNetUnfolder]: 1098/1705 cut-off events. [2023-09-01 02:17:05,280 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-09-01 02:17:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1705 events. 1098/1705 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7206 event pairs, 891 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 3547. Up to 1690 conditions per place. [2023-09-01 02:17:05,286 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-09-01 02:17:05,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 255 flow [2023-09-01 02:17:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-09-01 02:17:05,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450041981528128 [2023-09-01 02:17:05,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-09-01 02:17:05,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-09-01 02:17:05,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:05,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-09-01 02:17:05,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,292 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 177 flow. Second operand 3 states and 530 transitions. [2023-09-01 02:17:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 255 flow [2023-09-01 02:17:05,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 229 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-09-01 02:17:05,294 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 151 flow [2023-09-01 02:17:05,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-09-01 02:17:05,294 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-09-01 02:17:05,294 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 151 flow [2023-09-01 02:17:05,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:05,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:17:05,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:05,497 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:05,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 742530173, now seen corresponding path program 1 times [2023-09-01 02:17:05,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:05,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967578042] [2023-09-01 02:17:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:05,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:05,499 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:05,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:17:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:17:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:05,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:05,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:05,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967578042] [2023-09-01 02:17:05,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967578042] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:05,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:05,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:17:05,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930489331] [2023-09-01 02:17:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:05,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:05,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:05,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-09-01 02:17:05,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:05,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:05,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-09-01 02:17:05,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:06,013 INFO L130 PetriNetUnfolder]: 1098/1697 cut-off events. [2023-09-01 02:17:06,013 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 02:17:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1697 events. 1098/1697 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7125 event pairs, 891 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 3532. Up to 1690 conditions per place. [2023-09-01 02:17:06,020 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-09-01 02:17:06,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 233 flow [2023-09-01 02:17:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-09-01 02:17:06,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44584382871536526 [2023-09-01 02:17:06,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-09-01 02:17:06,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-09-01 02:17:06,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:06,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-09-01 02:17:06,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,028 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 151 flow. Second operand 3 states and 531 transitions. [2023-09-01 02:17:06,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 233 flow [2023-09-01 02:17:06,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:06,030 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 151 flow [2023-09-01 02:17:06,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-09-01 02:17:06,031 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-09-01 02:17:06,031 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 151 flow [2023-09-01 02:17:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:06,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:17:06,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:06,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:06,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 742530365, now seen corresponding path program 1 times [2023-09-01 02:17:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:06,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012055459] [2023-09-01 02:17:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:06,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:06,246 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 (11)] Waiting until timeout for monitored process [2023-09-01 02:17:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:06,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 02:17:06,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:06,384 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-09-01 02:17:06,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2023-09-01 02:17:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:06,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:06,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:06,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012055459] [2023-09-01 02:17:06,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012055459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:06,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:06,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:17:06,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894567202] [2023-09-01 02:17:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:06,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:06,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-09-01 02:17:06,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:06,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-09-01 02:17:06,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:06,722 INFO L130 PetriNetUnfolder]: 1058/1627 cut-off events. [2023-09-01 02:17:06,722 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-09-01 02:17:06,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 1627 events. 1058/1627 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6760 event pairs, 857 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 3397. Up to 1627 conditions per place. [2023-09-01 02:17:06,729 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 02:17:06,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 229 flow [2023-09-01 02:17:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-09-01 02:17:06,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441645675902603 [2023-09-01 02:17:06,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-09-01 02:17:06,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-09-01 02:17:06,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:06,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-09-01 02:17:06,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,735 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 151 flow. Second operand 3 states and 529 transitions. [2023-09-01 02:17:06,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 229 flow [2023-09-01 02:17:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:06,737 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 145 flow [2023-09-01 02:17:06,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-09-01 02:17:06,737 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-09-01 02:17:06,738 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 145 flow [2023-09-01 02:17:06,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:06,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:06,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:17:06,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:06,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:06,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:06,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 742530366, now seen corresponding path program 1 times [2023-09-01 02:17:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:06,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820425433] [2023-09-01 02:17:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:06,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:06,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:06,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:17:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:17:07,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:07,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:07,111 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-09-01 02:17:07,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-09-01 02:17:07,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 02:17:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:07,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:07,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820425433] [2023-09-01 02:17:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820425433] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:07,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:07,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:17:07,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330015147] [2023-09-01 02:17:07,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:07,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:17:07,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:17:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:17:08,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-09-01 02:17:08,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:08,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:08,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-09-01 02:17:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:08,606 INFO L130 PetriNetUnfolder]: 1018/1557 cut-off events. [2023-09-01 02:17:08,606 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 02:17:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 1557 events. 1018/1557 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6330 event pairs, 823 based on Foata normal form. 0/1064 useless extension candidates. Maximal degree in co-relation 3257. Up to 869 conditions per place. [2023-09-01 02:17:08,611 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-09-01 02:17:08,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 345 flow [2023-09-01 02:17:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:17:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:17:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-09-01 02:17:08,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317380352644836 [2023-09-01 02:17:08,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-09-01 02:17:08,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-09-01 02:17:08,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:08,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-09-01 02:17:08,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:08,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:08,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:08,620 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 145 flow. Second operand 5 states and 857 transitions. [2023-09-01 02:17:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 345 flow [2023-09-01 02:17:08,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:08,622 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 146 flow [2023-09-01 02:17:08,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-09-01 02:17:08,623 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-09-01 02:17:08,623 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 146 flow [2023-09-01 02:17:08,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:08,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:08,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:17:08,637 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 [2023-09-01 02:17:08,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:08,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:08,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000927, now seen corresponding path program 2 times [2023-09-01 02:17:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:08,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47572130] [2023-09-01 02:17:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:17:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:08,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:08,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:17:08,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 02:17:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:17:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:17:08,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:08,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:17:09,006 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-09-01 02:17:09,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-09-01 02:17:09,020 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:17:09,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 02:17:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:17:09,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:09,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47572130] [2023-09-01 02:17:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47572130] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:09,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:09,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:17:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415618040] [2023-09-01 02:17:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:09,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-09-01 02:17:09,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:09,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:09,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-09-01 02:17:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:09,443 INFO L130 PetriNetUnfolder]: 893/1381 cut-off events. [2023-09-01 02:17:09,443 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 02:17:09,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 1381 events. 893/1381 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5595 event pairs, 718 based on Foata normal form. 50/979 useless extension candidates. Maximal degree in co-relation 2853. Up to 1381 conditions per place. [2023-09-01 02:17:09,448 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 02:17:09,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 37 transitions, 208 flow [2023-09-01 02:17:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-09-01 02:17:09,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508816120906801 [2023-09-01 02:17:09,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-09-01 02:17:09,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-09-01 02:17:09,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:09,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-09-01 02:17:09,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 02:17:09,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:09,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:09,455 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 146 flow. Second operand 3 states and 537 transitions. [2023-09-01 02:17:09,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 37 transitions, 208 flow [2023-09-01 02:17:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 02:17:09,457 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 129 flow [2023-09-01 02:17:09,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-09-01 02:17:09,457 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-09-01 02:17:09,458 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 129 flow [2023-09-01 02:17:09,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:09,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:09,458 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:17:09,472 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 [2023-09-01 02:17:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:09,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:09,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000836, now seen corresponding path program 2 times [2023-09-01 02:17:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:09,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460412523] [2023-09-01 02:17:09,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:17:09,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:09,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:09,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:17:09,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:17:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:17:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:17:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:09,866 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:09,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:09,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:10,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460412523] [2023-09-01 02:17:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460412523] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:10,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:10,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:17:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717777838] [2023-09-01 02:17:10,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:17:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:17:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:17:13,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-09-01 02:17:13,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:13,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:13,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-09-01 02:17:13,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:16,476 INFO L130 PetriNetUnfolder]: 3563/5503 cut-off events. [2023-09-01 02:17:16,476 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 02:17:16,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11333 conditions, 5503 events. 3563/5503 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 28317 event pairs, 2872 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 11317. Up to 704 conditions per place. [2023-09-01 02:17:16,495 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 226 selfloop transitions, 13 changer transitions 0/239 dead transitions. [2023-09-01 02:17:16,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 239 transitions, 1121 flow [2023-09-01 02:17:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:17:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:17:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2201 transitions. [2023-09-01 02:17:16,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620067170445004 [2023-09-01 02:17:16,503 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2201 transitions. [2023-09-01 02:17:16,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2201 transitions. [2023-09-01 02:17:16,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:16,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2201 transitions. [2023-09-01 02:17:16,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.41666666666666) internal successors, (2201), 12 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:16,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 397.0) internal successors, (5161), 13 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:16,528 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 397.0) internal successors, (5161), 13 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:16,528 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 129 flow. Second operand 12 states and 2201 transitions. [2023-09-01 02:17:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 239 transitions, 1121 flow [2023-09-01 02:17:16,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 239 transitions, 1120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:16,532 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 242 flow [2023-09-01 02:17:16,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-09-01 02:17:16,534 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2023-09-01 02:17:16,534 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 242 flow [2023-09-01 02:17:16,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:16,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:16,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:16,548 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 [2023-09-01 02:17:16,745 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 [2023-09-01 02:17:16,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:16,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash 606944818, now seen corresponding path program 1 times [2023-09-01 02:17:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646737087] [2023-09-01 02:17:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:16,746 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 [2023-09-01 02:17:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:16,747 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:16,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:17:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:16,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:17:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:16,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:16,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646737087] [2023-09-01 02:17:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646737087] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:16,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:16,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:17:16,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707889299] [2023-09-01 02:17:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:16,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:17:16,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:17:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:17:17,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-09-01 02:17:17,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:17,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:17,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-09-01 02:17:17,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:17,834 INFO L130 PetriNetUnfolder]: 5147/7999 cut-off events. [2023-09-01 02:17:17,834 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 02:17:17,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16466 conditions, 7999 events. 5147/7999 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 45994 event pairs, 2872 based on Foata normal form. 0/5343 useless extension candidates. Maximal degree in co-relation 16442. Up to 5490 conditions per place. [2023-09-01 02:17:17,864 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 60 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-09-01 02:17:17,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 429 flow [2023-09-01 02:17:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:17:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:17:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2023-09-01 02:17:17,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357682619647355 [2023-09-01 02:17:17,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2023-09-01 02:17:17,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2023-09-01 02:17:17,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:17,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2023-09-01 02:17:17,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:17,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:17,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:17,873 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 242 flow. Second operand 5 states and 865 transitions. [2023-09-01 02:17:17,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 429 flow [2023-09-01 02:17:17,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 399 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 02:17:17,875 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 236 flow [2023-09-01 02:17:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-09-01 02:17:17,876 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2023-09-01 02:17:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 236 flow [2023-09-01 02:17:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:17,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:17,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:17,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-09-01 02:17:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:18,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:18,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 607129059, now seen corresponding path program 1 times [2023-09-01 02:17:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960136813] [2023-09-01 02:17:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:18,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:18,089 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:18,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:17:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 02:17:18,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:18,275 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-09-01 02:17:18,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-09-01 02:17:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:18,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:18,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960136813] [2023-09-01 02:17:18,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960136813] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:18,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:18,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:17:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306571581] [2023-09-01 02:17:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:17:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:17:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:17:18,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-09-01 02:17:18,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:18,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:18,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-09-01 02:17:18,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:18,994 INFO L130 PetriNetUnfolder]: 4571/7111 cut-off events. [2023-09-01 02:17:18,994 INFO L131 PetriNetUnfolder]: For 1588/1588 co-relation queries the response was YES. [2023-09-01 02:17:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16162 conditions, 7111 events. 4571/7111 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 39014 event pairs, 3816 based on Foata normal form. 0/5591 useless extension candidates. Maximal degree in co-relation 16136. Up to 7111 conditions per place. [2023-09-01 02:17:19,018 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-09-01 02:17:19,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 320 flow [2023-09-01 02:17:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:17:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:17:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-09-01 02:17:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43912678421494544 [2023-09-01 02:17:19,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-09-01 02:17:19,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-09-01 02:17:19,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:19,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-09-01 02:17:19,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:19,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:19,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:19,025 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 236 flow. Second operand 3 states and 523 transitions. [2023-09-01 02:17:19,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 320 flow [2023-09-01 02:17:19,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 44 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:19,029 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 220 flow [2023-09-01 02:17:19,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=44} [2023-09-01 02:17:19,030 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-09-01 02:17:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 220 flow [2023-09-01 02:17:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:19,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:19,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:19,242 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:19,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 607129060, now seen corresponding path program 1 times [2023-09-01 02:17:19,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:19,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970757141] [2023-09-01 02:17:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:19,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:19,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:17:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 02:17:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:19,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:19,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:19,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:19,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:19,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970757141] [2023-09-01 02:17:19,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970757141] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:19,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:19,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:17:19,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938332227] [2023-09-01 02:17:19,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:19,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:17:19,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:17:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:17:20,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-09-01 02:17:20,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 44 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:20,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:20,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-09-01 02:17:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:21,143 INFO L130 PetriNetUnfolder]: 3995/6223 cut-off events. [2023-09-01 02:17:21,144 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2023-09-01 02:17:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13920 conditions, 6223 events. 3995/6223 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 33305 event pairs, 3336 based on Foata normal form. 0/5167 useless extension candidates. Maximal degree in co-relation 13894. Up to 5445 conditions per place. [2023-09-01 02:17:21,164 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-09-01 02:17:21,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 422 flow [2023-09-01 02:17:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:17:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:17:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-09-01 02:17:21,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42670025188916877 [2023-09-01 02:17:21,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-09-01 02:17:21,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-09-01 02:17:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-09-01 02:17:21,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:21,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:21,177 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:21,177 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 220 flow. Second operand 5 states and 847 transitions. [2023-09-01 02:17:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 422 flow [2023-09-01 02:17:21,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:21,180 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 221 flow [2023-09-01 02:17:21,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-09-01 02:17:21,181 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-09-01 02:17:21,181 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 221 flow [2023-09-01 02:17:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:21,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:21,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:21,196 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 [2023-09-01 02:17:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:21,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:21,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1635424995, now seen corresponding path program 1 times [2023-09-01 02:17:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903643446] [2023-09-01 02:17:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:21,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:21,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:21,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:17:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:17:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:21,583 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:21,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:21,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:21,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903643446] [2023-09-01 02:17:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903643446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:21,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:17:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007352373] [2023-09-01 02:17:21,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:21,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:17:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:17:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:17:24,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-09-01 02:17:24,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 221 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) [2023-09-01 02:17:24,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:24,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-09-01 02:17:24,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:25,888 INFO L130 PetriNetUnfolder]: 5995/8991 cut-off events. [2023-09-01 02:17:25,889 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 02:17:25,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8991 events. 5995/8991 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 50842 event pairs, 1544 based on Foata normal form. 256/7903 useless extension candidates. Maximal degree in co-relation 20344. Up to 3026 conditions per place. [2023-09-01 02:17:25,922 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 85 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-09-01 02:17:25,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 546 flow [2023-09-01 02:17:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:17:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:17:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-09-01 02:17:25,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317380352644834 [2023-09-01 02:17:25,928 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-09-01 02:17:25,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-09-01 02:17:25,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:25,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-09-01 02:17:25,931 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) [2023-09-01 02:17:25,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:25,935 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:25,935 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 221 flow. Second operand 8 states and 1344 transitions. [2023-09-01 02:17:25,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 546 flow [2023-09-01 02:17:25,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 539 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:25,940 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 289 flow [2023-09-01 02:17:25,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=76, PETRI_TRANSITIONS=47} [2023-09-01 02:17:25,940 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-09-01 02:17:25,940 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 289 flow [2023-09-01 02:17:25,941 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) [2023-09-01 02:17:25,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:25,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:25,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:17:26,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:26,151 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:26,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash -664683545, now seen corresponding path program 1 times [2023-09-01 02:17:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:26,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983410908] [2023-09-01 02:17:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:26,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:26,152 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:26,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:17:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 02:17:26,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:26,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:17:26,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983410908] [2023-09-01 02:17:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983410908] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:26,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:17:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677919734] [2023-09-01 02:17:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:17:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:17:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:17:26,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-09-01 02:17:26,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 47 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:26,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:26,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-09-01 02:17:26,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:27,603 INFO L130 PetriNetUnfolder]: 8331/12511 cut-off events. [2023-09-01 02:17:27,603 INFO L131 PetriNetUnfolder]: For 16824/16824 co-relation queries the response was YES. [2023-09-01 02:17:27,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36353 conditions, 12511 events. 8331/12511 cut-off events. For 16824/16824 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 72447 event pairs, 4680 based on Foata normal form. 0/10879 useless extension candidates. Maximal degree in co-relation 36321. Up to 8978 conditions per place. [2023-09-01 02:17:27,652 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 62 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-09-01 02:17:27,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 533 flow [2023-09-01 02:17:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:17:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:17:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-09-01 02:17:27,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073047858942065 [2023-09-01 02:17:27,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-09-01 02:17:27,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-09-01 02:17:27,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:27,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-09-01 02:17:27,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:27,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:27,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 397.0) internal successors, (2382), 6 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:27,660 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 289 flow. Second operand 5 states and 855 transitions. [2023-09-01 02:17:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 533 flow [2023-09-01 02:17:27,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 506 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:27,678 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 296 flow [2023-09-01 02:17:27,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2023-09-01 02:17:27,678 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-09-01 02:17:27,678 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 296 flow [2023-09-01 02:17:27,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:27,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:27,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:27,693 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 [2023-09-01 02:17:27,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:27,889 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:27,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 869650084, now seen corresponding path program 1 times [2023-09-01 02:17:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:27,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840521328] [2023-09-01 02:17:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:27,891 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:17:27,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 02:17:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:17:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:28,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:28,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:28,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:17:28,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:28,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840521328] [2023-09-01 02:17:28,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840521328] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:28,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:28,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:17:28,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927678136] [2023-09-01 02:17:28,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:28,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:17:28,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:17:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:17:30,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-09-01 02:17:30,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:30,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:30,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-09-01 02:17:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:32,868 INFO L130 PetriNetUnfolder]: 12875/18687 cut-off events. [2023-09-01 02:17:32,868 INFO L131 PetriNetUnfolder]: For 22632/22632 co-relation queries the response was YES. [2023-09-01 02:17:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55148 conditions, 18687 events. 12875/18687 cut-off events. For 22632/22632 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 107053 event pairs, 3640 based on Foata normal form. 544/18687 useless extension candidates. Maximal degree in co-relation 55115. Up to 7154 conditions per place. [2023-09-01 02:17:33,100 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 113 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2023-09-01 02:17:33,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 126 transitions, 896 flow [2023-09-01 02:17:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:17:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:17:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1342 transitions. [2023-09-01 02:17:33,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422544080604534 [2023-09-01 02:17:33,105 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1342 transitions. [2023-09-01 02:17:33,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1342 transitions. [2023-09-01 02:17:33,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:33,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1342 transitions. [2023-09-01 02:17:33,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.75) internal successors, (1342), 8 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:33,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:33,112 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 397.0) internal successors, (3573), 9 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:33,112 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 296 flow. Second operand 8 states and 1342 transitions. [2023-09-01 02:17:33,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 126 transitions, 896 flow [2023-09-01 02:17:33,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 880 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:33,140 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 355 flow [2023-09-01 02:17:33,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2023-09-01 02:17:33,141 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2023-09-01 02:17:33,141 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 355 flow [2023-09-01 02:17:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:33,153 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 [2023-09-01 02:17:33,352 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 [2023-09-01 02:17:33,352 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:33,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1158192526, now seen corresponding path program 2 times [2023-09-01 02:17:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690439823] [2023-09-01 02:17:33,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:17:33,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:33,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:33,354 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) [2023-09-01 02:17:33,356 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 [2023-09-01 02:17:33,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:17:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:17:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 02:17:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:33,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:33,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:33,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:34,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:34,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690439823] [2023-09-01 02:17:34,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690439823] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:34,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:34,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 02:17:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882553219] [2023-09-01 02:17:34,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:34,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:17:34,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:17:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:17:43,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-09-01 02:17:43,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 355 flow. Second operand has 18 states, 18 states have (on average 155.22222222222223) internal successors, (2794), 18 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:43,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:43,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-09-01 02:17:43,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:52,893 INFO L130 PetriNetUnfolder]: 12915/18945 cut-off events. [2023-09-01 02:17:52,893 INFO L131 PetriNetUnfolder]: For 39711/39711 co-relation queries the response was YES. [2023-09-01 02:17:52,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67568 conditions, 18945 events. 12915/18945 cut-off events. For 39711/39711 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 111392 event pairs, 5312 based on Foata normal form. 186/19131 useless extension candidates. Maximal degree in co-relation 67530. Up to 7861 conditions per place. [2023-09-01 02:17:53,012 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 301 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2023-09-01 02:17:53,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 325 transitions, 2379 flow [2023-09-01 02:17:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 02:17:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 02:17:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3155 transitions. [2023-09-01 02:17:53,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41826859339785233 [2023-09-01 02:17:53,020 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3155 transitions. [2023-09-01 02:17:53,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3155 transitions. [2023-09-01 02:17:53,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:53,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3155 transitions. [2023-09-01 02:17:53,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 166.05263157894737) internal successors, (3155), 19 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:53,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:53,037 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:53,037 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 355 flow. Second operand 19 states and 3155 transitions. [2023-09-01 02:17:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 325 transitions, 2379 flow [2023-09-01 02:17:53,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 325 transitions, 2231 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:53,148 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 521 flow [2023-09-01 02:17:53,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=521, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2023-09-01 02:17:53,148 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 47 predicate places. [2023-09-01 02:17:53,148 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 521 flow [2023-09-01 02:17:53,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.22222222222223) internal successors, (2794), 18 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:53,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:53,149 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 02:17:53,159 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 [2023-09-01 02:17:53,355 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 [2023-09-01 02:17:53,356 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:17:53,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 703290884, now seen corresponding path program 3 times [2023-09-01 02:17:53,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:17:53,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393125026] [2023-09-01 02:17:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:17:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:17:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:17:53,358 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) [2023-09-01 02:17:53,359 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 [2023-09-01 02:17:53,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 02:17:53,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:17:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:17:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:17:53,616 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:17:53,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:17:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:53,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:17:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:55,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:17:55,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393125026] [2023-09-01 02:17:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393125026] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:17:55,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:17:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:17:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668542198] [2023-09-01 02:17:55,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:17:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:17:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:17:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:17:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:18:09,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-09-01 02:18:09,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 521 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:09,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:18:09,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-09-01 02:18:09,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:18:30,893 INFO L130 PetriNetUnfolder]: 32223/46965 cut-off events. [2023-09-01 02:18:30,893 INFO L131 PetriNetUnfolder]: For 132949/132949 co-relation queries the response was YES. [2023-09-01 02:18:31,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176565 conditions, 46965 events. 32223/46965 cut-off events. For 132949/132949 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 285843 event pairs, 24676 based on Foata normal form. 12/46977 useless extension candidates. Maximal degree in co-relation 176522. Up to 6891 conditions per place. [2023-09-01 02:18:31,367 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 721 selfloop transitions, 25 changer transitions 0/746 dead transitions. [2023-09-01 02:18:31,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 746 transitions, 5743 flow [2023-09-01 02:18:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 02:18:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 02:18:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4430 transitions. [2023-09-01 02:18:31,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649454240134341 [2023-09-01 02:18:31,373 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4430 transitions. [2023-09-01 02:18:31,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4430 transitions. [2023-09-01 02:18:31,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:18:31,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4430 transitions. [2023-09-01 02:18:31,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 184.58333333333334) internal successors, (4430), 24 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:31,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 397.0) internal successors, (9925), 25 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:31,390 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 397.0) internal successors, (9925), 25 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:31,390 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 521 flow. Second operand 24 states and 4430 transitions. [2023-09-01 02:18:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 746 transitions, 5743 flow [2023-09-01 02:18:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 746 transitions, 5649 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-09-01 02:18:31,862 INFO L231 Difference]: Finished difference. Result has 136 places, 82 transitions, 671 flow [2023-09-01 02:18:31,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=671, PETRI_PLACES=136, PETRI_TRANSITIONS=82} [2023-09-01 02:18:31,863 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2023-09-01 02:18:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 82 transitions, 671 flow [2023-09-01 02:18:31,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:18:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:18:31,872 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 [2023-09-01 02:18:32,064 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 [2023-09-01 02:18:32,064 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:18:32,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:18:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash 506397479, now seen corresponding path program 2 times [2023-09-01 02:18:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:18:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402516018] [2023-09-01 02:18:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:18:32,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:18:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:18:32,066 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) [2023-09-01 02:18:32,067 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 [2023-09-01 02:18:32,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:18:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:18:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 02:18:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:18:32,264 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:18:32,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:18:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:18:32,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:18:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:18:33,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:18:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402516018] [2023-09-01 02:18:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402516018] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:18:33,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:18:33,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-09-01 02:18:33,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239507979] [2023-09-01 02:18:33,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:18:33,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 02:18:33,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:18:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 02:18:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-09-01 02:18:42,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-09-01 02:18:42,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 82 transitions, 671 flow. Second operand has 18 states, 18 states have (on average 155.44444444444446) internal successors, (2798), 18 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:42,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:18:42,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-09-01 02:18:42,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:18:55,440 INFO L130 PetriNetUnfolder]: 32779/48005 cut-off events. [2023-09-01 02:18:55,440 INFO L131 PetriNetUnfolder]: For 133495/133495 co-relation queries the response was YES. [2023-09-01 02:18:55,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178816 conditions, 48005 events. 32779/48005 cut-off events. For 133495/133495 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 298675 event pairs, 17652 based on Foata normal form. 222/48227 useless extension candidates. Maximal degree in co-relation 178762. Up to 29637 conditions per place. [2023-09-01 02:18:55,980 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 315 selfloop transitions, 24 changer transitions 0/339 dead transitions. [2023-09-01 02:18:55,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 339 transitions, 2711 flow [2023-09-01 02:18:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 02:18:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 02:18:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3146 transitions. [2023-09-01 02:18:55,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417075434177383 [2023-09-01 02:18:55,985 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3146 transitions. [2023-09-01 02:18:55,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3146 transitions. [2023-09-01 02:18:55,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:18:55,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3146 transitions. [2023-09-01 02:18:55,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 165.57894736842104) internal successors, (3146), 19 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:55,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:55,995 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 397.0) internal successors, (7940), 20 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:55,995 INFO L175 Difference]: Start difference. First operand has 136 places, 82 transitions, 671 flow. Second operand 19 states and 3146 transitions. [2023-09-01 02:18:55,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 339 transitions, 2711 flow [2023-09-01 02:18:56,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 339 transitions, 2657 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-09-01 02:18:56,509 INFO L231 Difference]: Finished difference. Result has 149 places, 96 transitions, 786 flow [2023-09-01 02:18:56,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=786, PETRI_PLACES=149, PETRI_TRANSITIONS=96} [2023-09-01 02:18:56,510 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 89 predicate places. [2023-09-01 02:18:56,510 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 96 transitions, 786 flow [2023-09-01 02:18:56,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 155.44444444444446) internal successors, (2798), 18 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:56,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:18:56,511 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 02:18:56,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-09-01 02:18:56,713 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 [2023-09-01 02:18:56,714 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:18:56,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:18:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1920332437, now seen corresponding path program 3 times [2023-09-01 02:18:56,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:18:56,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549612820] [2023-09-01 02:18:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:18:56,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:18:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:18:56,716 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) [2023-09-01 02:18:56,717 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 [2023-09-01 02:18:56,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 02:18:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:18:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 02:18:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:18:57,047 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:18:57,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:18:57,166 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 13 treesize of output 9 [2023-09-01 02:18:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:18:57,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:18:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:18:57,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:18:57,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549612820] [2023-09-01 02:18:57,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549612820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:18:57,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:18:57,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-09-01 02:18:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202359211] [2023-09-01 02:18:57,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:18:57,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 02:18:57,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:18:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 02:18:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-09-01 02:18:59,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-09-01 02:18:59,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 96 transitions, 786 flow. Second operand has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:59,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:18:59,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-09-01 02:18:59,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:19:07,456 INFO L130 PetriNetUnfolder]: 31201/45639 cut-off events. [2023-09-01 02:19:07,457 INFO L131 PetriNetUnfolder]: For 166466/166466 co-relation queries the response was YES. [2023-09-01 02:19:07,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186730 conditions, 45639 events. 31201/45639 cut-off events. For 166466/166466 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 283990 event pairs, 16334 based on Foata normal form. 160/45799 useless extension candidates. Maximal degree in co-relation 186670. Up to 28912 conditions per place. [2023-09-01 02:19:08,045 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 240 selfloop transitions, 21 changer transitions 0/261 dead transitions. [2023-09-01 02:19:08,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 261 transitions, 2279 flow [2023-09-01 02:19:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 02:19:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 02:19:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2492 transitions. [2023-09-01 02:19:08,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184718723761545 [2023-09-01 02:19:08,048 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2492 transitions. [2023-09-01 02:19:08,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2492 transitions. [2023-09-01 02:19:08,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:19:08,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2492 transitions. [2023-09-01 02:19:08,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.13333333333333) internal successors, (2492), 15 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:08,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 397.0) internal successors, (6352), 16 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:08,054 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 397.0) internal successors, (6352), 16 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:08,054 INFO L175 Difference]: Start difference. First operand has 149 places, 96 transitions, 786 flow. Second operand 15 states and 2492 transitions. [2023-09-01 02:19:08,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 261 transitions, 2279 flow [2023-09-01 02:19:08,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 261 transitions, 2135 flow, removed 66 selfloop flow, removed 4 redundant places. [2023-09-01 02:19:08,992 INFO L231 Difference]: Finished difference. Result has 164 places, 100 transitions, 850 flow [2023-09-01 02:19:08,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=850, PETRI_PLACES=164, PETRI_TRANSITIONS=100} [2023-09-01 02:19:08,993 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2023-09-01 02:19:08,993 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 100 transitions, 850 flow [2023-09-01 02:19:08,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:08,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:19:08,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 02:19:09,003 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 [2023-09-01 02:19:09,194 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 [2023-09-01 02:19:09,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:19:09,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:19:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2034447274, now seen corresponding path program 4 times [2023-09-01 02:19:09,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:19:09,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206760443] [2023-09-01 02:19:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:19:09,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:19:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:19:09,196 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) [2023-09-01 02:19:09,197 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 [2023-09-01 02:19:09,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:19:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:19:09,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 02:19:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:19:09,545 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:19:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:19:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:19:09,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:19:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:19:11,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:19:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206760443] [2023-09-01 02:19:11,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206760443] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:19:11,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:19:11,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:19:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844636313] [2023-09-01 02:19:11,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:19:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:19:11,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:19:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:19:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:19:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-09-01 02:19:23,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 100 transitions, 850 flow. Second operand has 24 states, 24 states have (on average 154.16666666666666) internal successors, (3700), 24 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:23,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:19:23,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-09-01 02:19:23,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:19:51,915 INFO L130 PetriNetUnfolder]: 48031/68793 cut-off events. [2023-09-01 02:19:51,915 INFO L131 PetriNetUnfolder]: For 278121/278121 co-relation queries the response was YES. [2023-09-01 02:19:52,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298387 conditions, 68793 events. 48031/68793 cut-off events. For 278121/278121 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 434544 event pairs, 7686 based on Foata normal form. 9486/78279 useless extension candidates. Maximal degree in co-relation 298321. Up to 14042 conditions per place. [2023-09-01 02:19:52,733 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 590 selfloop transitions, 46 changer transitions 0/636 dead transitions. [2023-09-01 02:19:52,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 636 transitions, 5095 flow [2023-09-01 02:19:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 02:19:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 02:19:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5939 transitions. [2023-09-01 02:19:52,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41554715924993 [2023-09-01 02:19:52,740 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5939 transitions. [2023-09-01 02:19:52,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5939 transitions. [2023-09-01 02:19:52,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:19:52,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5939 transitions. [2023-09-01 02:19:52,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:52,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 397.0) internal successors, (14689), 37 states have internal predecessors, (14689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:52,759 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 397.0) internal successors, (14689), 37 states have internal predecessors, (14689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:52,760 INFO L175 Difference]: Start difference. First operand has 164 places, 100 transitions, 850 flow. Second operand 36 states and 5939 transitions. [2023-09-01 02:19:52,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 636 transitions, 5095 flow [2023-09-01 02:20:02,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 636 transitions, 5049 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 02:20:02,633 INFO L231 Difference]: Finished difference. Result has 197 places, 111 transitions, 1035 flow [2023-09-01 02:20:02,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1035, PETRI_PLACES=197, PETRI_TRANSITIONS=111} [2023-09-01 02:20:02,634 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 137 predicate places. [2023-09-01 02:20:02,634 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 111 transitions, 1035 flow [2023-09-01 02:20:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 154.16666666666666) internal successors, (3700), 24 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:02,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:20:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 02:20:02,644 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 [2023-09-01 02:20:02,835 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 [2023-09-01 02:20:02,835 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:20:02,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:20:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -694757469, now seen corresponding path program 5 times [2023-09-01 02:20:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:20:02,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962617641] [2023-09-01 02:20:02,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:20:02,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:20:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:20:02,837 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) [2023-09-01 02:20:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-09-01 02:20:02,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:20:02,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:20:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:20:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:20:03,071 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:20:03,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:20:03,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-09-01 02:20:03,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-09-01 02:20:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:20:03,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:20:03,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-09-01 02:20:03,587 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 02:20:03,590 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 02:20:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:20:05,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:20:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962617641] [2023-09-01 02:20:05,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962617641] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:20:05,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:20:05,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-09-01 02:20:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297404910] [2023-09-01 02:20:05,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:20:05,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 02:20:05,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:20:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 02:20:05,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-09-01 02:20:19,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-09-01 02:20:19,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 111 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 154.27272727272728) internal successors, (3394), 22 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:19,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:20:19,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-09-01 02:20:19,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:20:33,581 INFO L130 PetriNetUnfolder]: 47467/68001 cut-off events. [2023-09-01 02:20:33,581 INFO L131 PetriNetUnfolder]: For 286304/286304 co-relation queries the response was YES. [2023-09-01 02:20:34,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322905 conditions, 68001 events. 47467/68001 cut-off events. For 286304/286304 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 414171 event pairs, 31114 based on Foata normal form. 80/68081 useless extension candidates. Maximal degree in co-relation 322834. Up to 59523 conditions per place. [2023-09-01 02:20:34,505 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 361 selfloop transitions, 38 changer transitions 0/399 dead transitions. [2023-09-01 02:20:34,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 399 transitions, 3349 flow [2023-09-01 02:20:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:20:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:20:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3770 transitions. [2023-09-01 02:20:34,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41287920271602235 [2023-09-01 02:20:34,657 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3770 transitions. [2023-09-01 02:20:34,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3770 transitions. [2023-09-01 02:20:34,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:20:34,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3770 transitions. [2023-09-01 02:20:34,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 163.91304347826087) internal successors, (3770), 23 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:34,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 397.0) internal successors, (9528), 24 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:34,673 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 397.0) internal successors, (9528), 24 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:34,673 INFO L175 Difference]: Start difference. First operand has 197 places, 111 transitions, 1035 flow. Second operand 23 states and 3770 transitions. [2023-09-01 02:20:34,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 399 transitions, 3349 flow [2023-09-01 02:20:55,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 399 transitions, 3134 flow, removed 37 selfloop flow, removed 31 redundant places. [2023-09-01 02:20:55,702 INFO L231 Difference]: Finished difference. Result has 189 places, 125 transitions, 1040 flow [2023-09-01 02:20:55,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1040, PETRI_PLACES=189, PETRI_TRANSITIONS=125} [2023-09-01 02:20:55,703 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 129 predicate places. [2023-09-01 02:20:55,703 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 125 transitions, 1040 flow [2023-09-01 02:20:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 154.27272727272728) internal successors, (3394), 22 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:55,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:20:55,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:20:55,712 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 [2023-09-01 02:20:55,904 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 [2023-09-01 02:20:55,904 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:20:55,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:20:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425492, now seen corresponding path program 3 times [2023-09-01 02:20:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:20:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110447922] [2023-09-01 02:20:55,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:20:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:20:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:20:55,906 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) [2023-09-01 02:20:55,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-09-01 02:20:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 02:20:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:20:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:20:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:20:56,214 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:20:56,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:20:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:20:56,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:20:56,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-09-01 02:20:56,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-09-01 02:20:56,572 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 02:20:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:20:57,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:20:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110447922] [2023-09-01 02:20:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110447922] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:20:57,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:20:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 02:20:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402704905] [2023-09-01 02:20:57,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:20:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 02:20:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:20:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 02:20:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-09-01 02:21:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 397 [2023-09-01 02:21:05,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 125 transitions, 1040 flow. Second operand has 20 states, 20 states have (on average 156.45) internal successors, (3129), 20 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:05,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:21:05,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 397 [2023-09-01 02:21:05,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:21:22,295 INFO L130 PetriNetUnfolder]: 46623/66957 cut-off events. [2023-09-01 02:21:22,295 INFO L131 PetriNetUnfolder]: For 290328/290328 co-relation queries the response was YES. [2023-09-01 02:21:22,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274932 conditions, 66957 events. 46623/66957 cut-off events. For 290328/290328 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 411711 event pairs, 28238 based on Foata normal form. 222/67179 useless extension candidates. Maximal degree in co-relation 274869. Up to 53750 conditions per place. [2023-09-01 02:21:23,133 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 440 selfloop transitions, 34 changer transitions 0/474 dead transitions. [2023-09-01 02:21:23,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 474 transitions, 3910 flow [2023-09-01 02:21:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 02:21:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 02:21:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3498 transitions. [2023-09-01 02:21:23,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195753868297949 [2023-09-01 02:21:23,139 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3498 transitions. [2023-09-01 02:21:23,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3498 transitions. [2023-09-01 02:21:23,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:21:23,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3498 transitions. [2023-09-01 02:21:23,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 166.57142857142858) internal successors, (3498), 21 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:23,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 397.0) internal successors, (8734), 22 states have internal predecessors, (8734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:23,151 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 397.0) internal successors, (8734), 22 states have internal predecessors, (8734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:23,151 INFO L175 Difference]: Start difference. First operand has 189 places, 125 transitions, 1040 flow. Second operand 21 states and 3498 transitions. [2023-09-01 02:21:23,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 474 transitions, 3910 flow [2023-09-01 02:21:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 474 transitions, 3800 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-09-01 02:21:36,247 INFO L231 Difference]: Finished difference. Result has 204 places, 127 transitions, 1142 flow [2023-09-01 02:21:36,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1142, PETRI_PLACES=204, PETRI_TRANSITIONS=127} [2023-09-01 02:21:36,248 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 144 predicate places. [2023-09-01 02:21:36,248 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 127 transitions, 1142 flow [2023-09-01 02:21:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 156.45) internal successors, (3129), 20 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:36,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:21:36,248 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:21:36,257 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 [2023-09-01 02:21:36,448 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 [2023-09-01 02:21:36,449 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:21:36,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:21:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2026595935, now seen corresponding path program 4 times [2023-09-01 02:21:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:21:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608364987] [2023-09-01 02:21:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:21:36,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:21:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:21:36,451 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) [2023-09-01 02:21:36,451 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 [2023-09-01 02:21:36,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:21:36,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:21:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 02:21:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:21:36,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:21:36,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:21:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:21:37,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:21:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:21:38,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:21:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608364987] [2023-09-01 02:21:38,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608364987] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:21:38,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:21:38,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 02:21:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489595736] [2023-09-01 02:21:38,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:21:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:21:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:21:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:21:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:21:51,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-09-01 02:21:51,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 127 transitions, 1142 flow. Second operand has 24 states, 24 states have (on average 154.33333333333334) internal successors, (3704), 24 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:51,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:21:51,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-09-01 02:21:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:22:27,601 INFO L130 PetriNetUnfolder]: 73131/102997 cut-off events. [2023-09-01 02:22:27,601 INFO L131 PetriNetUnfolder]: For 543435/543435 co-relation queries the response was YES. [2023-09-01 02:22:28,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463004 conditions, 102997 events. 73131/102997 cut-off events. For 543435/543435 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 646956 event pairs, 12234 based on Foata normal form. 15392/118389 useless extension candidates. Maximal degree in co-relation 462932. Up to 23498 conditions per place. [2023-09-01 02:22:29,239 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 628 selfloop transitions, 58 changer transitions 0/686 dead transitions. [2023-09-01 02:22:29,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 686 transitions, 5340 flow [2023-09-01 02:22:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 02:22:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 02:22:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6081 transitions. [2023-09-01 02:22:29,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41398325277418474 [2023-09-01 02:22:29,246 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6081 transitions. [2023-09-01 02:22:29,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6081 transitions. [2023-09-01 02:22:29,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:22:29,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6081 transitions. [2023-09-01 02:22:29,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 164.35135135135135) internal successors, (6081), 37 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:29,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:29,267 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:29,268 INFO L175 Difference]: Start difference. First operand has 204 places, 127 transitions, 1142 flow. Second operand 37 states and 6081 transitions. [2023-09-01 02:22:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 686 transitions, 5340 flow [2023-09-01 02:22:44,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 686 transitions, 5259 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-09-01 02:22:44,405 INFO L231 Difference]: Finished difference. Result has 236 places, 138 transitions, 1327 flow [2023-09-01 02:22:44,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1327, PETRI_PLACES=236, PETRI_TRANSITIONS=138} [2023-09-01 02:22:44,406 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 176 predicate places. [2023-09-01 02:22:44,406 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 138 transitions, 1327 flow [2023-09-01 02:22:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 154.33333333333334) internal successors, (3704), 24 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:44,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:22:44,406 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 02:22:44,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-09-01 02:22:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:22:44,607 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:22:44,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:22:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1856037898, now seen corresponding path program 6 times [2023-09-01 02:22:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:22:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919284956] [2023-09-01 02:22:44,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:22:44,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:22:44,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:22:44,609 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:22:44,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-09-01 02:22:45,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-09-01 02:22:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:22:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:22:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:22:45,110 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:22:45,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:22:45,217 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 13 treesize of output 9 [2023-09-01 02:22:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 02:22:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:22:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:22:46,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:22:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919284956] [2023-09-01 02:22:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919284956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:22:46,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:22:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-09-01 02:22:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290503768] [2023-09-01 02:22:46,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:22:46,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 02:22:46,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:22:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 02:22:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-09-01 02:22:54,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-09-01 02:22:54,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 138 transitions, 1327 flow. Second operand has 25 states, 25 states have (on average 157.24) internal successors, (3931), 25 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:54,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:22:54,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-09-01 02:22:54,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:23:16,334 INFO L130 PetriNetUnfolder]: 70117/98957 cut-off events. [2023-09-01 02:23:16,334 INFO L131 PetriNetUnfolder]: For 638774/638774 co-relation queries the response was YES. [2023-09-01 02:23:17,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483134 conditions, 98957 events. 70117/98957 cut-off events. For 638774/638774 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 614449 event pairs, 38826 based on Foata normal form. 148/99105 useless extension candidates. Maximal degree in co-relation 483059. Up to 67671 conditions per place. [2023-09-01 02:23:17,857 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 609 selfloop transitions, 49 changer transitions 0/658 dead transitions. [2023-09-01 02:23:17,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 658 transitions, 6867 flow [2023-09-01 02:23:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 02:23:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 02:23:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6178 transitions. [2023-09-01 02:23:17,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058683368507044 [2023-09-01 02:23:17,862 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6178 transitions. [2023-09-01 02:23:17,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6178 transitions. [2023-09-01 02:23:17,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:23:17,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6178 transitions. [2023-09-01 02:23:17,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 166.97297297297297) internal successors, (6178), 37 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:17,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:17,881 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 397.0) internal successors, (15086), 38 states have internal predecessors, (15086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:17,882 INFO L175 Difference]: Start difference. First operand has 236 places, 138 transitions, 1327 flow. Second operand 37 states and 6178 transitions. [2023-09-01 02:23:17,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 658 transitions, 6867 flow [2023-09-01 02:23:46,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 658 transitions, 5356 flow, removed 460 selfloop flow, removed 25 redundant places. [2023-09-01 02:23:46,039 INFO L231 Difference]: Finished difference. Result has 252 places, 153 transitions, 1309 flow [2023-09-01 02:23:46,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1309, PETRI_PLACES=252, PETRI_TRANSITIONS=153} [2023-09-01 02:23:46,040 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 192 predicate places. [2023-09-01 02:23:46,040 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 153 transitions, 1309 flow [2023-09-01 02:23:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 157.24) internal successors, (3931), 25 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:46,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:23:46,041 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1] [2023-09-01 02:23:46,051 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 (29)] Forceful destruction successful, exit code 0 [2023-09-01 02:23:46,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:23:46,242 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:23:46,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:23:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1918483722, now seen corresponding path program 7 times [2023-09-01 02:23:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:23:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967610590] [2023-09-01 02:23:46,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:23:46,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:23:46,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:23:46,244 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:23:46,246 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 (30)] Waiting until timeout for monitored process [2023-09-01 02:23:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:23:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 02:23:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:23:46,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:23:46,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:23:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:23:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:23:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:23:50,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:23:50,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967610590] [2023-09-01 02:23:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967610590] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:23:50,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:23:50,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 37 [2023-09-01 02:23:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967378320] [2023-09-01 02:23:50,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:23:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 02:23:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:23:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 02:23:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 02:24:26,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 397 [2023-09-01 02:24:26,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 153 transitions, 1309 flow. Second operand has 38 states, 38 states have (on average 150.1578947368421) internal successors, (5706), 38 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:26,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:24:26,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 397 [2023-09-01 02:24:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:25:23,391 INFO L130 PetriNetUnfolder]: 72355/103037 cut-off events. [2023-09-01 02:25:23,391 INFO L131 PetriNetUnfolder]: For 633944/633944 co-relation queries the response was YES. [2023-09-01 02:25:24,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434896 conditions, 103037 events. 72355/103037 cut-off events. For 633944/633944 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 664116 event pairs, 32810 based on Foata normal form. 294/103331 useless extension candidates. Maximal degree in co-relation 434820. Up to 54138 conditions per place. [2023-09-01 02:25:24,929 INFO L137 encePairwiseOnDemand]: 387/397 looper letters, 1585 selfloop transitions, 127 changer transitions 0/1712 dead transitions. [2023-09-01 02:25:24,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1712 transitions, 14669 flow [2023-09-01 02:25:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-09-01 02:25:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-09-01 02:25:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 12707 transitions. [2023-09-01 02:25:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051589452539617 [2023-09-01 02:25:24,944 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 12707 transitions. [2023-09-01 02:25:24,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 12707 transitions. [2023-09-01 02:25:24,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:25:24,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 12707 transitions. [2023-09-01 02:25:24,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 160.84810126582278) internal successors, (12707), 79 states have internal predecessors, (12707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:24,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 397.0) internal successors, (31760), 80 states have internal predecessors, (31760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:24,987 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 397.0) internal successors, (31760), 80 states have internal predecessors, (31760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:24,987 INFO L175 Difference]: Start difference. First operand has 252 places, 153 transitions, 1309 flow. Second operand 79 states and 12707 transitions. [2023-09-01 02:25:24,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1712 transitions, 14669 flow [2023-09-01 02:26:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1712 transitions, 14600 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-09-01 02:26:34,950 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2173 flow [2023-09-01 02:26:34,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=2173, PETRI_PLACES=321, PETRI_TRANSITIONS=217} [2023-09-01 02:26:34,950 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 261 predicate places. [2023-09-01 02:26:34,950 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2173 flow [2023-09-01 02:26:34,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 150.1578947368421) internal successors, (5706), 38 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:26:34,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:26:34,952 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:26:34,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-09-01 02:26:35,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:26:35,153 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:26:35,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:26:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1932636167, now seen corresponding path program 5 times [2023-09-01 02:26:35,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:26:35,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588837169] [2023-09-01 02:26:35,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:26:35,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:26:35,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:26:35,156 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:26:35,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-09-01 02:26:35,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-09-01 02:26:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:26:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 02:26:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:26:35,514 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 02:26:35,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 02:26:36,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-09-01 02:26:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:26:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:26:36,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-09-01 02:26:36,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-09-01 02:26:36,394 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 02:26:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:26:40,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:26:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588837169] [2023-09-01 02:26:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588837169] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:26:40,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:26:40,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2023-09-01 02:26:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79954717] [2023-09-01 02:26:40,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:26:40,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 02:26:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:26:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 02:26:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 02:27:18,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-09-01 02:27:18,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 217 transitions, 2173 flow. Second operand has 35 states, 35 states have (on average 154.28571428571428) internal successors, (5400), 35 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:27:18,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:27:18,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-09-01 02:27:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:28:08,483 INFO L130 PetriNetUnfolder]: 73727/106305 cut-off events. [2023-09-01 02:28:08,484 INFO L131 PetriNetUnfolder]: For 837260/837260 co-relation queries the response was YES. [2023-09-01 02:28:09,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532900 conditions, 106305 events. 73727/106305 cut-off events. For 837260/837260 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 699187 event pairs, 41804 based on Foata normal form. 324/106629 useless extension candidates. Maximal degree in co-relation 532814. Up to 76479 conditions per place. [2023-09-01 02:28:10,469 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 1143 selfloop transitions, 114 changer transitions 0/1257 dead transitions. [2023-09-01 02:28:10,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1257 transitions, 12787 flow [2023-09-01 02:28:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-09-01 02:28:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-09-01 02:28:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 8908 transitions. [2023-09-01 02:28:10,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415523836178748 [2023-09-01 02:28:10,482 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 8908 transitions. [2023-09-01 02:28:10,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 8908 transitions. [2023-09-01 02:28:10,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:28:10,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 8908 transitions. [2023-09-01 02:28:10,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 164.96296296296296) internal successors, (8908), 54 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:28:10,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 397.0) internal successors, (21835), 55 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:28:10,515 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 397.0) internal successors, (21835), 55 states have internal predecessors, (21835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:28:10,515 INFO L175 Difference]: Start difference. First operand has 321 places, 217 transitions, 2173 flow. Second operand 54 states and 8908 transitions. [2023-09-01 02:28:10,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1257 transitions, 12787 flow [2023-09-01 02:29:40,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1257 transitions, 10786 flow, removed 508 selfloop flow, removed 45 redundant places. [2023-09-01 02:29:40,078 INFO L231 Difference]: Finished difference. Result has 341 places, 266 transitions, 2554 flow [2023-09-01 02:29:40,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2554, PETRI_PLACES=341, PETRI_TRANSITIONS=266} [2023-09-01 02:29:40,079 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 281 predicate places. [2023-09-01 02:29:40,079 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 266 transitions, 2554 flow [2023-09-01 02:29:40,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 154.28571428571428) internal successors, (5400), 35 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:29:40,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:29:40,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:29:40,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-09-01 02:29:40,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:29:40,285 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-09-01 02:29:40,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:29:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash 929375108, now seen corresponding path program 1 times [2023-09-01 02:29:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:29:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936183219] [2023-09-01 02:29:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:29:40,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:29:40,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:29:40,287 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:29:40,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-09-01 02:29:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:29:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 02:29:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:29:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:29:40,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:29:40,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:29:40,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936183219] [2023-09-01 02:29:40,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936183219] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:29:40,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:29:40,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:29:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911208875] [2023-09-01 02:29:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:29:40,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:29:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:29:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:29:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:29:40,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-09-01 02:29:40,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 266 transitions, 2554 flow. Second operand has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:29:40,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:29:40,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-09-01 02:29:40,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15