./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:24:03,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:24:03,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:24:03,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:24:03,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:24:03,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:24:03,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:24:03,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:24:03,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:24:03,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:24:03,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:24:03,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:24:03,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:24:03,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:24:03,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:24:03,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:24:03,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:24:03,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:24:03,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:24:03,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:24:03,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:24:03,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:24:03,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:24:03,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:24:03,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:24:03,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:24:03,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:24:03,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:24:03,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:24:03,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:24:03,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:24:03,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:24:03,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:24:03,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:24:03,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:24:03,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:24:03,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:24:03,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:24:03,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:24:03,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:24:03,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:24:03,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:24:03,533 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:24:03,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:24:03,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:24:03,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:24:03,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:24:03,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:24:03,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:24:03,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:24:03,536 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:24:03,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:24:03,537 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:24:03,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:24:03,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:24:03,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:24:03,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:24:03,538 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:24:03,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:03,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:24:03,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:24:03,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:24:03,540 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:24:03,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:24:03,540 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:24:03,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:24:03,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:24:03,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:24:03,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:24:03,812 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:24:03,812 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:24:03,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-29 23:24:04,806 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:24:04,983 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:24:04,983 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-29 23:24:04,987 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d7651fd/973368bcac5a4c9389e490dee1d6918a/FLAGf0552a3af [2023-08-29 23:24:04,998 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d7651fd/973368bcac5a4c9389e490dee1d6918a [2023-08-29 23:24:04,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:24:05,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:24:05,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:05,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:24:05,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:24:05,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:04" (1/1) ... [2023-08-29 23:24:05,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1290ef49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:05, skipping insertion in model container [2023-08-29 23:24:05,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:04" (1/1) ... [2023-08-29 23:24:05,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:24:05,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:05,144 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] [2023-08-29 23:24:05,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:05,158 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:24:05,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f32a43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:05, skipping insertion in model container [2023-08-29 23:24:05,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:05,159 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:24:05,161 INFO L158 Benchmark]: Toolchain (without parser) took 159.65ms. Allocated memory is still 73.4MB. Free memory was 51.8MB in the beginning and 41.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:24:05,161 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:24:05,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.16ms. Allocated memory is still 73.4MB. Free memory was 51.6MB in the beginning and 41.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-29 23:24:05,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory was 34.8MB in the beginning and 34.7MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.16ms. Allocated memory is still 73.4MB. Free memory was 51.6MB in the beginning and 41.9MB in the end (delta: 9.6MB). 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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:24:06,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:24:06,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:24:06,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:24:06,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:24:06,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:24:06,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:24:06,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:24:06,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:24:06,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:24:06,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:24:06,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:24:06,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:24:06,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:24:06,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:24:06,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:24:06,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:24:06,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:24:06,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:24:06,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:24:06,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:24:06,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:24:06,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:24:06,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:24:06,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:24:06,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:24:06,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:24:06,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:24:06,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:24:06,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:24:06,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:24:06,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:24:06,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:24:06,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:24:06,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:24:06,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:24:06,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:24:06,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:24:06,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:24:06,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:24:06,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:24:06,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:24:06,848 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:24:06,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:24:06,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:24:06,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:24:06,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:24:06,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:24:06,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:24:06,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:24:06,851 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:24:06,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:24:06,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:24:06,853 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:24:06,854 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:24:06,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:24:06,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:24:06,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:24:06,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:06,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:24:06,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:24:06,855 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:24:06,856 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:24:06,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:24:07,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:24:07,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:24:07,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:24:07,085 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:24:07,085 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:24:07,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-29 23:24:08,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:24:08,286 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:24:08,287 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2023-08-29 23:24:08,293 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5452a75bf/688737a1aac44df395daf843ee3cf86f/FLAG590aad9ad [2023-08-29 23:24:08,303 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5452a75bf/688737a1aac44df395daf843ee3cf86f [2023-08-29 23:24:08,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:24:08,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:24:08,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:08,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:24:08,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:24:08,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651c0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08, skipping insertion in model container [2023-08-29 23:24:08,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:24:08,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:08,460 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] [2023-08-29 23:24:08,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:08,474 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:24:08,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:24:08,487 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] [2023-08-29 23:24:08,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:08,492 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:24:08,506 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] [2023-08-29 23:24:08,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:24:08,515 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:24:08,515 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:24:08,519 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:24:08,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08 WrapperNode [2023-08-29 23:24:08,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:24:08,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:24:08,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:24:08,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:24:08,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,545 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2023-08-29 23:24:08,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:24:08,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:24:08,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:24:08,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:24:08,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:24:08,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:24:08,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:24:08,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:24:08,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (1/1) ... [2023-08-29 23:24:08,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:24:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:24:08,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:24:08,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:24:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:24:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:24:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:24:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:24:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:24:08,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:24:08,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:24:08,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:24:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:24:08,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:24:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:24:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:24:08,693 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:24:08,793 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:24:08,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:24:09,167 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:24:09,226 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:24:09,226 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:24:09,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:24:09 BoogieIcfgContainer [2023-08-29 23:24:09,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:24:09,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:24:09,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:24:09,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:24:09,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:24:08" (1/3) ... [2023-08-29 23:24:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5624eb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:24:09, skipping insertion in model container [2023-08-29 23:24:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:24:08" (2/3) ... [2023-08-29 23:24:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5624eb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:24:09, skipping insertion in model container [2023-08-29 23:24:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:24:09" (3/3) ... [2023-08-29 23:24:09,233 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2023-08-29 23:24:09,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:24:09,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-29 23:24:09,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:24:09,309 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:24:09,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 197 transitions, 418 flow [2023-08-29 23:24:09,383 INFO L130 PetriNetUnfolder]: 12/194 cut-off events. [2023-08-29 23:24:09,386 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:24:09,391 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. [2023-08-29 23:24:09,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 197 transitions, 418 flow [2023-08-29 23:24:09,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 398 flow [2023-08-29 23:24:09,404 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:24:09,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 398 flow [2023-08-29 23:24:09,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 398 flow [2023-08-29 23:24:09,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 398 flow [2023-08-29 23:24:09,469 INFO L130 PetriNetUnfolder]: 12/190 cut-off events. [2023-08-29 23:24:09,469 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:24:09,470 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. [2023-08-29 23:24:09,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2023-08-29 23:24:26,940 INFO L134 LiptonReduction]: Checked pairs total: 4273 [2023-08-29 23:24:26,940 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-29 23:24:26,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:24:26,963 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;@24e46bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:24:26,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-29 23:24:26,966 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:24:26,966 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:24:26,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:26,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:26,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:26,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-08-29 23:24:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:26,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146587650] [2023-08-29 23:24:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:26,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:27,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:24:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:24:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:27,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:27,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:27,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:27,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146587650] [2023-08-29 23:24:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146587650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:27,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:27,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362262098] [2023-08-29 23:24:27,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:27,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 397 [2023-08-29 23:24:27,499 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) [2023-08-29 23:24:27,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:27,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 397 [2023-08-29 23:24:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:27,962 INFO L130 PetriNetUnfolder]: 2075/3133 cut-off events. [2023-08-29 23:24:27,962 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 23:24:27,966 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. [2023-08-29 23:24:27,979 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 83 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-29 23:24:27,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 384 flow [2023-08-29 23:24:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-29 23:24:27,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071368597816961 [2023-08-29 23:24:27,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-29 23:24:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-29 23:24:28,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:28,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-29 23:24:28,007 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) [2023-08-29 23:24:28,012 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) [2023-08-29 23:24:28,013 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) [2023-08-29 23:24:28,014 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 604 transitions. [2023-08-29 23:24:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 384 flow [2023-08-29 23:24:28,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:24:28,024 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 116 flow [2023-08-29 23:24:28,025 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} [2023-08-29 23:24:28,033 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-08-29 23:24:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 116 flow [2023-08-29 23:24:28,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:28,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:28,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 23:24:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:28,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:28,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-08-29 23:24:28,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:28,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110820099] [2023-08-29 23:24:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:28,244 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 [2023-08-29 23:24:28,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:28,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:28,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:24:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:24:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:28,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:28,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110820099] [2023-08-29 23:24:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110820099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130435652] [2023-08-29 23:24:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:28,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 397 [2023-08-29 23:24:28,387 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) [2023-08-29 23:24:28,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:28,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 397 [2023-08-29 23:24:28,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:28,631 INFO L130 PetriNetUnfolder]: 1038/1570 cut-off events. [2023-08-29 23:24:28,631 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:24:28,632 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. [2023-08-29 23:24:28,637 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-29 23:24:28,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 210 flow [2023-08-29 23:24:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-29 23:24:28,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019311502938704 [2023-08-29 23:24:28,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-29 23:24:28,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-29 23:24:28,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:28,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-29 23:24:28,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:28,642 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) [2023-08-29 23:24:28,643 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) [2023-08-29 23:24:28,644 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 116 flow. Second operand 3 states and 560 transitions. [2023-08-29 23:24:28,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 210 flow [2023-08-29 23:24:28,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:28,646 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2023-08-29 23:24:28,646 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} [2023-08-29 23:24:28,647 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-29 23:24:28,647 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2023-08-29 23:24:28,648 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) [2023-08-29 23:24:28,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:28,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:24:28,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:28,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:28,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash 24837, now seen corresponding path program 1 times [2023-08-29 23:24:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77762190] [2023-08-29 23:24:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:28,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:28,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:28,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:28,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:24:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:24:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:28,951 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 23:24:28,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 23:24:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:28,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:28,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77762190] [2023-08-29 23:24:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77762190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:28,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582646706] [2023-08-29 23:24:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:28,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:28,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-08-29 23:24:29,057 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) [2023-08-29 23:24:29,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:29,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-08-29 23:24:29,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:29,275 INFO L130 PetriNetUnfolder]: 1038/1567 cut-off events. [2023-08-29 23:24:29,275 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:24:29,277 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. [2023-08-29 23:24:29,281 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 42 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-29 23:24:29,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 208 flow [2023-08-29 23:24:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-29 23:24:29,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45759865659109994 [2023-08-29 23:24:29,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-29 23:24:29,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-29 23:24:29,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:29,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-29 23:24:29,284 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) [2023-08-29 23:24:29,286 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) [2023-08-29 23:24:29,286 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) [2023-08-29 23:24:29,287 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 3 states and 545 transitions. [2023-08-29 23:24:29,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 208 flow [2023-08-29 23:24:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:29,288 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 118 flow [2023-08-29 23:24:29,288 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} [2023-08-29 23:24:29,289 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-08-29 23:24:29,289 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 118 flow [2023-08-29 23:24:29,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:29,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:29,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:29,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:29,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:29,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash 772624, now seen corresponding path program 1 times [2023-08-29 23:24:29,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:29,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435602430] [2023-08-29 23:24:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:29,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:29,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:29,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:29,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:24:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:24:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:29,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-29 23:24:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:29,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:29,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435602430] [2023-08-29 23:24:29,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435602430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:29,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:29,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:24:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509403567] [2023-08-29 23:24:29,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:29,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:30,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 397 [2023-08-29 23:24:30,055 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) [2023-08-29 23:24:30,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:30,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 397 [2023-08-29 23:24:30,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:30,489 INFO L130 PetriNetUnfolder]: 2075/3130 cut-off events. [2023-08-29 23:24:30,489 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 23:24:30,491 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. [2023-08-29 23:24:30,499 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 79 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-29 23:24:30,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 374 flow [2023-08-29 23:24:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 909 transitions. [2023-08-29 23:24:30,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579345088161209 [2023-08-29 23:24:30,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 909 transitions. [2023-08-29 23:24:30,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 909 transitions. [2023-08-29 23:24:30,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:30,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 909 transitions. [2023-08-29 23:24:30,504 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) [2023-08-29 23:24:30,506 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) [2023-08-29 23:24:30,507 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) [2023-08-29 23:24:30,507 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 5 states and 909 transitions. [2023-08-29 23:24:30,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 374 flow [2023-08-29 23:24:30,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:30,510 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 127 flow [2023-08-29 23:24:30,510 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} [2023-08-29 23:24:30,511 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-29 23:24:30,511 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 127 flow [2023-08-29 23:24:30,512 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) [2023-08-29 23:24:30,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:30,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:30,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:30,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:30,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:30,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 772556, now seen corresponding path program 1 times [2023-08-29 23:24:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873812677] [2023-08-29 23:24:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:30,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:30,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:24:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:24:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:30,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:31,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:31,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873812677] [2023-08-29 23:24:31,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873812677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:31,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:24:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121529550] [2023-08-29 23:24:31,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:31,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-29 23:24:31,644 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) [2023-08-29 23:24:31,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:31,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-29 23:24:31,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:32,288 INFO L130 PetriNetUnfolder]: 2081/3137 cut-off events. [2023-08-29 23:24:32,289 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 23:24:32,292 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. [2023-08-29 23:24:32,301 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 78 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-08-29 23:24:32,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 429 flow [2023-08-29 23:24:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-08-29 23:24:32,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466834592779177 [2023-08-29 23:24:32,304 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-08-29 23:24:32,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-08-29 23:24:32,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:32,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-08-29 23:24:32,307 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) [2023-08-29 23:24:32,310 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) [2023-08-29 23:24:32,310 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) [2023-08-29 23:24:32,311 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 127 flow. Second operand 6 states and 1064 transitions. [2023-08-29 23:24:32,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 429 flow [2023-08-29 23:24:32,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:32,312 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 220 flow [2023-08-29 23:24:32,313 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} [2023-08-29 23:24:32,313 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-29 23:24:32,313 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 220 flow [2023-08-29 23:24:32,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:32,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:32,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:32,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:32,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:32,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:32,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash 772645, now seen corresponding path program 1 times [2023-08-29 23:24:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:32,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924390387] [2023-08-29 23:24:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:32,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:32,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:32,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:32,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:24:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 23:24:32,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:32,642 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-08-29 23:24:32,642 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 [2023-08-29 23:24:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:32,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:32,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924390387] [2023-08-29 23:24:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924390387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540383905] [2023-08-29 23:24:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:32,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 397 [2023-08-29 23:24:32,762 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) [2023-08-29 23:24:32,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:32,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 397 [2023-08-29 23:24:32,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:32,986 INFO L130 PetriNetUnfolder]: 1719/2629 cut-off events. [2023-08-29 23:24:32,986 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 23:24:32,988 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. [2023-08-29 23:24:33,007 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 46 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-29 23:24:33,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 288 flow [2023-08-29 23:24:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-29 23:24:33,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550797649034425 [2023-08-29 23:24:33,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-29 23:24:33,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-29 23:24:33,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:33,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-29 23:24:33,011 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) [2023-08-29 23:24:33,013 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) [2023-08-29 23:24:33,013 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) [2023-08-29 23:24:33,013 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 220 flow. Second operand 3 states and 542 transitions. [2023-08-29 23:24:33,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 288 flow [2023-08-29 23:24:33,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 262 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:33,018 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 170 flow [2023-08-29 23:24:33,018 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} [2023-08-29 23:24:33,020 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-29 23:24:33,020 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 170 flow [2023-08-29 23:24:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:33,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:33,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:24:33,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:33,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:33,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 772647, now seen corresponding path program 1 times [2023-08-29 23:24:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665568510] [2023-08-29 23:24:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:33,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:33,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:33,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:24:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:24:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:33,398 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-29 23:24:33,399 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 [2023-08-29 23:24:33,411 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:24:33,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:24:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:33,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:33,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665568510] [2023-08-29 23:24:33,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665568510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:33,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:33,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:24:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73081499] [2023-08-29 23:24:33,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:33,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:33,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:34,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-29 23:24:34,285 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) [2023-08-29 23:24:34,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:34,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-29 23:24:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:34,917 INFO L130 PetriNetUnfolder]: 1537/2374 cut-off events. [2023-08-29 23:24:34,917 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:24:34,919 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. [2023-08-29 23:24:34,924 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 70 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-29 23:24:34,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 394 flow [2023-08-29 23:24:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:24:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:24:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1189 transitions. [2023-08-29 23:24:34,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278517452320979 [2023-08-29 23:24:34,927 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1189 transitions. [2023-08-29 23:24:34,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1189 transitions. [2023-08-29 23:24:34,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:34,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1189 transitions. [2023-08-29 23:24:34,930 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) [2023-08-29 23:24:34,932 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) [2023-08-29 23:24:34,933 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) [2023-08-29 23:24:34,933 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 170 flow. Second operand 7 states and 1189 transitions. [2023-08-29 23:24:34,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 394 flow [2023-08-29 23:24:34,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:34,934 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 177 flow [2023-08-29 23:24:34,935 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} [2023-08-29 23:24:34,935 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2023-08-29 23:24:34,935 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 177 flow [2023-08-29 23:24:34,935 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) [2023-08-29 23:24:34,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:34,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:34,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:35,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 742530172, now seen corresponding path program 1 times [2023-08-29 23:24:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:35,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352423913] [2023-08-29 23:24:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:35,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:35,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:35,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:24:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 23:24:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:35,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:35,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:35,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352423913] [2023-08-29 23:24:35,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352423913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:35,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621609733] [2023-08-29 23:24:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:35,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-29 23:24:35,285 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) [2023-08-29 23:24:35,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:35,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-29 23:24:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:35,480 INFO L130 PetriNetUnfolder]: 1098/1705 cut-off events. [2023-08-29 23:24:35,480 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-08-29 23:24:35,481 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. [2023-08-29 23:24:35,485 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-29 23:24:35,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 255 flow [2023-08-29 23:24:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-29 23:24:35,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450041981528128 [2023-08-29 23:24:35,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-29 23:24:35,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-29 23:24:35,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:35,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-29 23:24:35,488 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) [2023-08-29 23:24:35,490 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) [2023-08-29 23:24:35,490 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) [2023-08-29 23:24:35,490 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 177 flow. Second operand 3 states and 530 transitions. [2023-08-29 23:24:35,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 255 flow [2023-08-29 23:24:35,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 229 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-29 23:24:35,492 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 151 flow [2023-08-29 23:24:35,492 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} [2023-08-29 23:24:35,494 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-29 23:24:35,494 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 151 flow [2023-08-29 23:24:35,495 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) [2023-08-29 23:24:35,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:35,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:35,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:35,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:35,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash 742530173, now seen corresponding path program 1 times [2023-08-29 23:24:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:35,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691162159] [2023-08-29 23:24:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:35,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:35,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:24:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:35,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:24:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:35,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:35,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691162159] [2023-08-29 23:24:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691162159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:35,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:35,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259282531] [2023-08-29 23:24:35,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-29 23:24:35,960 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) [2023-08-29 23:24:35,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:35,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-29 23:24:35,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:36,263 INFO L130 PetriNetUnfolder]: 1098/1697 cut-off events. [2023-08-29 23:24:36,263 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-29 23:24:36,265 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. [2023-08-29 23:24:36,269 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-29 23:24:36,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 233 flow [2023-08-29 23:24:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-29 23:24:36,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44584382871536526 [2023-08-29 23:24:36,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-29 23:24:36,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-29 23:24:36,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:36,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-29 23:24:36,272 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) [2023-08-29 23:24:36,273 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) [2023-08-29 23:24:36,274 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) [2023-08-29 23:24:36,274 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 151 flow. Second operand 3 states and 531 transitions. [2023-08-29 23:24:36,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 233 flow [2023-08-29 23:24:36,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:36,275 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 151 flow [2023-08-29 23:24:36,275 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} [2023-08-29 23:24:36,276 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-08-29 23:24:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 151 flow [2023-08-29 23:24:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:36,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:36,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:36,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:36,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:36,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:36,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash 742530365, now seen corresponding path program 1 times [2023-08-29 23:24:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515060874] [2023-08-29 23:24:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:36,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:36,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:36,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:24:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:24:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:36,663 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-08-29 23:24:36,663 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 [2023-08-29 23:24:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:36,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:36,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515060874] [2023-08-29 23:24:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515060874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676213721] [2023-08-29 23:24:36,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:36,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-29 23:24:36,749 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) [2023-08-29 23:24:36,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:36,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-29 23:24:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:36,924 INFO L130 PetriNetUnfolder]: 1058/1627 cut-off events. [2023-08-29 23:24:36,925 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-29 23:24:36,926 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. [2023-08-29 23:24:36,930 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-29 23:24:36,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 41 transitions, 229 flow [2023-08-29 23:24:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-08-29 23:24:36,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441645675902603 [2023-08-29 23:24:36,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-08-29 23:24:36,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-08-29 23:24:36,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:36,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-08-29 23:24:36,933 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) [2023-08-29 23:24:36,934 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) [2023-08-29 23:24:36,934 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) [2023-08-29 23:24:36,934 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 151 flow. Second operand 3 states and 529 transitions. [2023-08-29 23:24:36,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 41 transitions, 229 flow [2023-08-29 23:24:36,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:36,936 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 145 flow [2023-08-29 23:24:36,937 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} [2023-08-29 23:24:36,937 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-29 23:24:36,937 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 145 flow [2023-08-29 23:24:36,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:36,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:36,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:24:36,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:37,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:37,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:37,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 742530366, now seen corresponding path program 1 times [2023-08-29 23:24:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:37,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989558053] [2023-08-29 23:24:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:37,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:24:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:24:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:37,321 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2023-08-29 23:24:37,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2023-08-29 23:24:37,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-29 23:24:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:37,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:37,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989558053] [2023-08-29 23:24:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989558053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:37,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:37,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:24:37,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463134496] [2023-08-29 23:24:37,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:37,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:37,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:37,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:37,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:38,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-29 23:24:38,418 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) [2023-08-29 23:24:38,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:38,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-29 23:24:38,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:38,834 INFO L130 PetriNetUnfolder]: 1018/1557 cut-off events. [2023-08-29 23:24:38,834 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-29 23:24:38,836 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. [2023-08-29 23:24:38,839 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-29 23:24:38,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 345 flow [2023-08-29 23:24:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2023-08-29 23:24:38,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317380352644836 [2023-08-29 23:24:38,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2023-08-29 23:24:38,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2023-08-29 23:24:38,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:38,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2023-08-29 23:24:38,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,845 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) [2023-08-29 23:24:38,847 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) [2023-08-29 23:24:38,847 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 145 flow. Second operand 5 states and 857 transitions. [2023-08-29 23:24:38,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 345 flow [2023-08-29 23:24:38,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:38,848 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 146 flow [2023-08-29 23:24:38,848 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} [2023-08-29 23:24:38,849 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-08-29 23:24:38,849 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 146 flow [2023-08-29 23:24:38,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.25) internal successors, (1274), 8 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:38,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:38,850 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:24:38,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:39,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,057 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:39,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000927, now seen corresponding path program 2 times [2023-08-29 23:24:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:39,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180615636] [2023-08-29 23:24:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:24:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:39,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:39,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:24:39,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 23:24:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:24:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:24:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:24:39,235 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-29 23:24:39,236 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 [2023-08-29 23:24:39,248 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:24:39,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-29 23:24:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:24:39,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:39,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180615636] [2023-08-29 23:24:39,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180615636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:39,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:39,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:39,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757249897] [2023-08-29 23:24:39,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:39,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-08-29 23:24:39,504 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) [2023-08-29 23:24:39,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:39,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-08-29 23:24:39,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:39,653 INFO L130 PetriNetUnfolder]: 893/1381 cut-off events. [2023-08-29 23:24:39,653 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-08-29 23:24:39,654 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. [2023-08-29 23:24:39,657 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-29 23:24:39,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 37 transitions, 208 flow [2023-08-29 23:24:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-29 23:24:39,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508816120906801 [2023-08-29 23:24:39,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-29 23:24:39,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-29 23:24:39,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:39,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-29 23:24:39,660 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) [2023-08-29 23:24:39,662 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) [2023-08-29 23:24:39,662 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) [2023-08-29 23:24:39,662 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 146 flow. Second operand 3 states and 537 transitions. [2023-08-29 23:24:39,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 37 transitions, 208 flow [2023-08-29 23:24:39,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:24:39,663 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 129 flow [2023-08-29 23:24:39,663 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} [2023-08-29 23:24:39,664 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-08-29 23:24:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 129 flow [2023-08-29 23:24:39,664 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) [2023-08-29 23:24:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:24:39,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:39,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1543000836, now seen corresponding path program 2 times [2023-08-29 23:24:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067017531] [2023-08-29 23:24:39,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:24:39,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:39,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:39,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:39,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 23:24:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:24:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:24:39,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:24:39,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:40,040 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:40,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:40,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:40,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067017531] [2023-08-29 23:24:40,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067017531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:40,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:40,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:24:40,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206547721] [2023-08-29 23:24:40,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:40,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:24:40,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:24:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:24:43,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-29 23:24:43,331 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) [2023-08-29 23:24:43,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:43,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-29 23:24:43,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:46,001 INFO L130 PetriNetUnfolder]: 3563/5503 cut-off events. [2023-08-29 23:24:46,001 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 23:24:46,005 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. [2023-08-29 23:24:46,045 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 226 selfloop transitions, 13 changer transitions 0/239 dead transitions. [2023-08-29 23:24:46,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 239 transitions, 1121 flow [2023-08-29 23:24:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:24:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:24:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2201 transitions. [2023-08-29 23:24:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620067170445004 [2023-08-29 23:24:46,050 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2201 transitions. [2023-08-29 23:24:46,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2201 transitions. [2023-08-29 23:24:46,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:46,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2201 transitions. [2023-08-29 23:24:46,054 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) [2023-08-29 23:24:46,059 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) [2023-08-29 23:24:46,069 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) [2023-08-29 23:24:46,070 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 129 flow. Second operand 12 states and 2201 transitions. [2023-08-29 23:24:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 239 transitions, 1121 flow [2023-08-29 23:24:46,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 239 transitions, 1120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:46,073 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 242 flow [2023-08-29 23:24:46,074 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} [2023-08-29 23:24:46,074 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2023-08-29 23:24:46,074 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 242 flow [2023-08-29 23:24:46,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:46,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:46,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:46,083 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 (14)] Ended with exit code 0 [2023-08-29 23:24:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:46,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:46,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 606944818, now seen corresponding path program 1 times [2023-08-29 23:24:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119071195] [2023-08-29 23:24:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:46,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:46,302 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:46,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-29 23:24:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:24:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:46,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:46,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119071195] [2023-08-29 23:24:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119071195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:46,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:46,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:46,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613958509] [2023-08-29 23:24:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:46,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:46,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:46,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-29 23:24:46,687 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) [2023-08-29 23:24:46,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:46,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-29 23:24:46,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:47,457 INFO L130 PetriNetUnfolder]: 5147/7999 cut-off events. [2023-08-29 23:24:47,458 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-29 23:24:47,465 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. [2023-08-29 23:24:47,476 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 60 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-08-29 23:24:47,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 429 flow [2023-08-29 23:24:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 865 transitions. [2023-08-29 23:24:47,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357682619647355 [2023-08-29 23:24:47,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 865 transitions. [2023-08-29 23:24:47,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 865 transitions. [2023-08-29 23:24:47,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:47,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 865 transitions. [2023-08-29 23:24:47,481 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) [2023-08-29 23:24:47,482 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) [2023-08-29 23:24:47,483 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) [2023-08-29 23:24:47,483 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 242 flow. Second operand 5 states and 865 transitions. [2023-08-29 23:24:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 429 flow [2023-08-29 23:24:47,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 399 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-29 23:24:47,484 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 236 flow [2023-08-29 23:24:47,485 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} [2023-08-29 23:24:47,485 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2023-08-29 23:24:47,485 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 236 flow [2023-08-29 23:24:47,486 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) [2023-08-29 23:24:47,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:47,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:47,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:47,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:47,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:47,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash 607129059, now seen corresponding path program 1 times [2023-08-29 23:24:47,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:47,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405311722] [2023-08-29 23:24:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:47,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:47,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-29 23:24:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:24:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:47,838 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2023-08-29 23:24:47,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2023-08-29 23:24:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:47,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:47,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405311722] [2023-08-29 23:24:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405311722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:47,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:47,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:24:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054647099] [2023-08-29 23:24:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:47,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 397 [2023-08-29 23:24:47,922 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) [2023-08-29 23:24:47,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:47,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 397 [2023-08-29 23:24:47,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:48,510 INFO L130 PetriNetUnfolder]: 4571/7111 cut-off events. [2023-08-29 23:24:48,510 INFO L131 PetriNetUnfolder]: For 1588/1588 co-relation queries the response was YES. [2023-08-29 23:24:48,518 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. [2023-08-29 23:24:48,529 INFO L137 encePairwiseOnDemand]: 394/397 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-29 23:24:48,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 320 flow [2023-08-29 23:24:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-29 23:24:48,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43912678421494544 [2023-08-29 23:24:48,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-29 23:24:48,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-29 23:24:48,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:48,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-29 23:24:48,533 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) [2023-08-29 23:24:48,534 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) [2023-08-29 23:24:48,534 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) [2023-08-29 23:24:48,535 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 236 flow. Second operand 3 states and 523 transitions. [2023-08-29 23:24:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 320 flow [2023-08-29 23:24:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 44 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:48,537 INFO L231 Difference]: Finished difference. Result has 66 places, 44 transitions, 220 flow [2023-08-29 23:24:48,537 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} [2023-08-29 23:24:48,537 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2023-08-29 23:24:48,537 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 44 transitions, 220 flow [2023-08-29 23:24:48,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:48,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:48,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:48,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:48,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:48,745 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:48,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash 607129060, now seen corresponding path program 1 times [2023-08-29 23:24:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558571228] [2023-08-29 23:24:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:48,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:48,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:48,749 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 (17)] Waiting until timeout for monitored process [2023-08-29 23:24:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:24:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:48,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:48,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:24:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:49,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:49,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558571228] [2023-08-29 23:24:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558571228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:49,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:24:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067131035] [2023-08-29 23:24:49,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:49,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 397 [2023-08-29 23:24:49,601 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) [2023-08-29 23:24:49,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:49,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 397 [2023-08-29 23:24:49,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:50,228 INFO L130 PetriNetUnfolder]: 3995/6223 cut-off events. [2023-08-29 23:24:50,229 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2023-08-29 23:24:50,236 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. [2023-08-29 23:24:50,245 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 64 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-29 23:24:50,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 422 flow [2023-08-29 23:24:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-08-29 23:24:50,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42670025188916877 [2023-08-29 23:24:50,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-08-29 23:24:50,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-08-29 23:24:50,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:50,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-08-29 23:24:50,250 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) [2023-08-29 23:24:50,251 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) [2023-08-29 23:24:50,252 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) [2023-08-29 23:24:50,252 INFO L175 Difference]: Start difference. First operand has 66 places, 44 transitions, 220 flow. Second operand 5 states and 847 transitions. [2023-08-29 23:24:50,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 422 flow [2023-08-29 23:24:50,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:50,254 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 221 flow [2023-08-29 23:24:50,254 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} [2023-08-29 23:24:50,255 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-08-29 23:24:50,255 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 221 flow [2023-08-29 23:24:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:50,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:50,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:50,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:50,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1635424995, now seen corresponding path program 1 times [2023-08-29 23:24:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726037068] [2023-08-29 23:24:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:50,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:50,464 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:50,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-29 23:24:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:24:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:50,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:50,617 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 [2023-08-29 23:24:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:50,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:50,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:50,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726037068] [2023-08-29 23:24:50,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726037068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:50,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:50,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:24:50,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391288156] [2023-08-29 23:24:50,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:50,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:24:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:24:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:24:53,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-08-29 23:24:53,194 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) [2023-08-29 23:24:53,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:53,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-08-29 23:24:53,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:54,530 INFO L130 PetriNetUnfolder]: 5995/8991 cut-off events. [2023-08-29 23:24:54,530 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-29 23:24:54,540 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. [2023-08-29 23:24:54,552 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 85 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-08-29 23:24:54,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 546 flow [2023-08-29 23:24:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:24:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:24:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-29 23:24:54,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317380352644834 [2023-08-29 23:24:54,555 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-29 23:24:54,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-29 23:24:54,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:54,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-29 23:24:54,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,561 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) [2023-08-29 23:24:54,561 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) [2023-08-29 23:24:54,562 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 221 flow. Second operand 8 states and 1344 transitions. [2023-08-29 23:24:54,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 546 flow [2023-08-29 23:24:54,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 539 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:54,564 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 289 flow [2023-08-29 23:24:54,564 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} [2023-08-29 23:24:54,565 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-08-29 23:24:54,565 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 289 flow [2023-08-29 23:24:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.6) internal successors, (1586), 10 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:54,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:54,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:54,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:54,772 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -664683545, now seen corresponding path program 1 times [2023-08-29 23:24:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123380708] [2023-08-29 23:24:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:54,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:54,774 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:54,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-29 23:24:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:54,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:24:54,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:54,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:24:54,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:54,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123380708] [2023-08-29 23:24:54,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123380708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:54,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:54,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153965] [2023-08-29 23:24:54,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:55,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 397 [2023-08-29 23:24:55,033 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) [2023-08-29 23:24:55,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:55,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 397 [2023-08-29 23:24:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:56,129 INFO L130 PetriNetUnfolder]: 8331/12511 cut-off events. [2023-08-29 23:24:56,129 INFO L131 PetriNetUnfolder]: For 16824/16824 co-relation queries the response was YES. [2023-08-29 23:24:56,148 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. [2023-08-29 23:24:56,243 INFO L137 encePairwiseOnDemand]: 392/397 looper letters, 62 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-29 23:24:56,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 533 flow [2023-08-29 23:24:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-08-29 23:24:56,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073047858942065 [2023-08-29 23:24:56,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-08-29 23:24:56,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-08-29 23:24:56,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:56,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-08-29 23:24:56,247 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) [2023-08-29 23:24:56,248 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) [2023-08-29 23:24:56,248 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) [2023-08-29 23:24:56,249 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 289 flow. Second operand 5 states and 855 transitions. [2023-08-29 23:24:56,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 533 flow [2023-08-29 23:24:56,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 506 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:56,258 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 296 flow [2023-08-29 23:24:56,258 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} [2023-08-29 23:24:56,258 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2023-08-29 23:24:56,258 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 296 flow [2023-08-29 23:24:56,258 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) [2023-08-29 23:24:56,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:56,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:56,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:24:56,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:56,465 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:24:56,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash 869650084, now seen corresponding path program 1 times [2023-08-29 23:24:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:24:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633525472] [2023-08-29 23:24:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:56,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:24:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:24:56,467 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:24:56,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-29 23:24:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:24:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:24:56,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:24:56,617 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 [2023-08-29 23:24:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:56,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:24:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:24:56,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:24:56,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633525472] [2023-08-29 23:24:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633525472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:24:56,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:24:56,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 23:24:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044892299] [2023-08-29 23:24:56,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:24:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:24:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:24:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:24:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:24:58,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 397 [2023-08-29 23:24:58,816 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) [2023-08-29 23:24:58,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:58,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 397 [2023-08-29 23:24:58,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:01,140 INFO L130 PetriNetUnfolder]: 12875/18687 cut-off events. [2023-08-29 23:25:01,141 INFO L131 PetriNetUnfolder]: For 22632/22632 co-relation queries the response was YES. [2023-08-29 23:25:01,168 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. [2023-08-29 23:25:01,203 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 113 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2023-08-29 23:25:01,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 126 transitions, 896 flow [2023-08-29 23:25:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:25:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:25:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1342 transitions. [2023-08-29 23:25:01,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422544080604534 [2023-08-29 23:25:01,206 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1342 transitions. [2023-08-29 23:25:01,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1342 transitions. [2023-08-29 23:25:01,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:01,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1342 transitions. [2023-08-29 23:25:01,209 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) [2023-08-29 23:25:01,211 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) [2023-08-29 23:25:01,211 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) [2023-08-29 23:25:01,211 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 296 flow. Second operand 8 states and 1342 transitions. [2023-08-29 23:25:01,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 126 transitions, 896 flow [2023-08-29 23:25:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 880 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 23:25:01,229 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 355 flow [2023-08-29 23:25:01,229 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} [2023-08-29 23:25:01,230 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2023-08-29 23:25:01,230 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 355 flow [2023-08-29 23:25:01,230 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) [2023-08-29 23:25:01,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:01,230 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:01,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:01,438 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:25:01,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1158192526, now seen corresponding path program 2 times [2023-08-29 23:25:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:01,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389565447] [2023-08-29 23:25:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:25:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:01,439 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:01,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-29 23:25:01,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:25:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:25:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:01,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:01,617 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 [2023-08-29 23:25:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:01,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:02,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:02,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389565447] [2023-08-29 23:25:02,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389565447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:25:02,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301732466] [2023-08-29 23:25:02,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:02,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:25:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:25:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:25:10,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-08-29 23:25:10,912 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) [2023-08-29 23:25:10,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:10,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-08-29 23:25:10,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:19,240 INFO L130 PetriNetUnfolder]: 12915/18945 cut-off events. [2023-08-29 23:25:19,240 INFO L131 PetriNetUnfolder]: For 39711/39711 co-relation queries the response was YES. [2023-08-29 23:25:19,308 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. [2023-08-29 23:25:19,361 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 301 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2023-08-29 23:25:19,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 325 transitions, 2379 flow [2023-08-29 23:25:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 23:25:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 23:25:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3155 transitions. [2023-08-29 23:25:19,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41826859339785233 [2023-08-29 23:25:19,366 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3155 transitions. [2023-08-29 23:25:19,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3155 transitions. [2023-08-29 23:25:19,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:19,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3155 transitions. [2023-08-29 23:25:19,371 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) [2023-08-29 23:25:19,376 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) [2023-08-29 23:25:19,376 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) [2023-08-29 23:25:19,376 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 355 flow. Second operand 19 states and 3155 transitions. [2023-08-29 23:25:19,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 325 transitions, 2379 flow [2023-08-29 23:25:19,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 325 transitions, 2231 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-08-29 23:25:19,447 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 521 flow [2023-08-29 23:25:19,447 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} [2023-08-29 23:25:19,448 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 47 predicate places. [2023-08-29 23:25:19,448 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 521 flow [2023-08-29 23:25:19,448 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) [2023-08-29 23:25:19,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:19,448 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-29 23:25:19,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:19,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:19,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:25:19,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 703290884, now seen corresponding path program 3 times [2023-08-29 23:25:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641188441] [2023-08-29 23:25:19,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:25:19,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:19,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:19,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-29 23:25:19,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:25:19,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:25:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:20,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:20,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:20,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:22,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641188441] [2023-08-29 23:25:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641188441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:22,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:22,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:25:22,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495060470] [2023-08-29 23:25:22,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:25:22,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:25:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:25:34,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 397 [2023-08-29 23:25:34,624 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) [2023-08-29 23:25:34,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:34,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 397 [2023-08-29 23:25:34,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:53,177 INFO L130 PetriNetUnfolder]: 32223/46965 cut-off events. [2023-08-29 23:25:53,178 INFO L131 PetriNetUnfolder]: For 132949/132949 co-relation queries the response was YES. [2023-08-29 23:25:53,420 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. [2023-08-29 23:25:53,552 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 721 selfloop transitions, 25 changer transitions 0/746 dead transitions. [2023-08-29 23:25:53,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 746 transitions, 5743 flow [2023-08-29 23:25:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:25:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:25:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4430 transitions. [2023-08-29 23:25:53,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649454240134341 [2023-08-29 23:25:53,558 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4430 transitions. [2023-08-29 23:25:53,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4430 transitions. [2023-08-29 23:25:53,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:53,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4430 transitions. [2023-08-29 23:25:53,563 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) [2023-08-29 23:25:53,569 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) [2023-08-29 23:25:53,569 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) [2023-08-29 23:25:53,569 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 521 flow. Second operand 24 states and 4430 transitions. [2023-08-29 23:25:53,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 746 transitions, 5743 flow [2023-08-29 23:25:53,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 746 transitions, 5649 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-08-29 23:25:53,955 INFO L231 Difference]: Finished difference. Result has 136 places, 82 transitions, 671 flow [2023-08-29 23:25:53,955 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} [2023-08-29 23:25:53,956 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2023-08-29 23:25:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 82 transitions, 671 flow [2023-08-29 23:25:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:53,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:53,957 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:53,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:25:54,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:54,175 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:25:54,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash 506397479, now seen corresponding path program 2 times [2023-08-29 23:25:54,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:25:54,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661265514] [2023-08-29 23:25:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:25:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:25:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:25:54,177 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:25:54,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-29 23:25:54,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:25:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:25:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:25:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:25:54,384 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:25:54,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:25:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:54,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:25:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:55,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:25:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661265514] [2023-08-29 23:25:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661265514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:25:55,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:25:55,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-29 23:25:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915914139] [2023-08-29 23:25:55,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:25:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:25:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:25:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:25:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:26:03,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 397 [2023-08-29 23:26:03,967 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) [2023-08-29 23:26:03,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:03,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 397 [2023-08-29 23:26:03,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:16,596 INFO L130 PetriNetUnfolder]: 32779/48005 cut-off events. [2023-08-29 23:26:16,596 INFO L131 PetriNetUnfolder]: For 133495/133495 co-relation queries the response was YES. [2023-08-29 23:26:16,820 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. [2023-08-29 23:26:16,960 INFO L137 encePairwiseOnDemand]: 389/397 looper letters, 315 selfloop transitions, 24 changer transitions 0/339 dead transitions. [2023-08-29 23:26:16,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 339 transitions, 2711 flow [2023-08-29 23:26:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-29 23:26:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-29 23:26:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3146 transitions. [2023-08-29 23:26:16,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.417075434177383 [2023-08-29 23:26:16,965 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3146 transitions. [2023-08-29 23:26:16,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3146 transitions. [2023-08-29 23:26:16,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:16,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3146 transitions. [2023-08-29 23:26:16,968 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) [2023-08-29 23:26:16,972 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) [2023-08-29 23:26:16,972 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) [2023-08-29 23:26:16,973 INFO L175 Difference]: Start difference. First operand has 136 places, 82 transitions, 671 flow. Second operand 19 states and 3146 transitions. [2023-08-29 23:26:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 339 transitions, 2711 flow [2023-08-29 23:26:17,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 339 transitions, 2657 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-08-29 23:26:17,435 INFO L231 Difference]: Finished difference. Result has 149 places, 96 transitions, 786 flow [2023-08-29 23:26:17,435 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} [2023-08-29 23:26:17,435 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 89 predicate places. [2023-08-29 23:26:17,436 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 96 transitions, 786 flow [2023-08-29 23:26:17,436 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) [2023-08-29 23:26:17,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:17,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:17,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:17,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:17,646 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:26:17,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1920332437, now seen corresponding path program 3 times [2023-08-29 23:26:17,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:17,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758690222] [2023-08-29 23:26:17,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:26:17,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:17,648 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-29 23:26:17,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:26:17,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:26:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:17,905 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:26:17,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:26:17,954 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 [2023-08-29 23:26:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:26:18,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:26:18,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758690222] [2023-08-29 23:26:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758690222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:18,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:26:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-29 23:26:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117830625] [2023-08-29 23:26:18,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:26:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:26:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:26:20,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-08-29 23:26:20,268 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) [2023-08-29 23:26:20,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:20,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-08-29 23:26:20,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:26,747 INFO L130 PetriNetUnfolder]: 31201/45639 cut-off events. [2023-08-29 23:26:26,747 INFO L131 PetriNetUnfolder]: For 166466/166466 co-relation queries the response was YES. [2023-08-29 23:26:26,946 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. [2023-08-29 23:26:27,060 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 240 selfloop transitions, 21 changer transitions 0/261 dead transitions. [2023-08-29 23:26:27,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 261 transitions, 2279 flow [2023-08-29 23:26:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:26:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:26:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2492 transitions. [2023-08-29 23:26:27,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184718723761545 [2023-08-29 23:26:27,063 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2492 transitions. [2023-08-29 23:26:27,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2492 transitions. [2023-08-29 23:26:27,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:27,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2492 transitions. [2023-08-29 23:26:27,065 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) [2023-08-29 23:26:27,068 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) [2023-08-29 23:26:27,068 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) [2023-08-29 23:26:27,068 INFO L175 Difference]: Start difference. First operand has 149 places, 96 transitions, 786 flow. Second operand 15 states and 2492 transitions. [2023-08-29 23:26:27,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 261 transitions, 2279 flow [2023-08-29 23:26:27,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 261 transitions, 2135 flow, removed 66 selfloop flow, removed 4 redundant places. [2023-08-29 23:26:27,817 INFO L231 Difference]: Finished difference. Result has 164 places, 100 transitions, 850 flow [2023-08-29 23:26:27,817 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} [2023-08-29 23:26:27,817 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2023-08-29 23:26:27,817 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 100 transitions, 850 flow [2023-08-29 23:26:27,818 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) [2023-08-29 23:26:27,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:27,818 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:27,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:28,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:28,026 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:26:28,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2034447274, now seen corresponding path program 4 times [2023-08-29 23:26:28,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:26:28,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384993636] [2023-08-29 23:26:28,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:26:28,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:26:28,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:26:28,028 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:26:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-29 23:26:28,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:26:28,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:26:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:28,219 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:26:28,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:26:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:28,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:29,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:26:29,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384993636] [2023-08-29 23:26:29,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384993636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:29,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:26:29,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:26:29,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368302163] [2023-08-29 23:26:29,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:29,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:26:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:26:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:26:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:26:41,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-29 23:26:41,026 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) [2023-08-29 23:26:41,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:41,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-29 23:26:41,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:05,884 INFO L130 PetriNetUnfolder]: 48031/68793 cut-off events. [2023-08-29 23:27:05,884 INFO L131 PetriNetUnfolder]: For 278121/278121 co-relation queries the response was YES. [2023-08-29 23:27:06,488 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. [2023-08-29 23:27:06,692 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 590 selfloop transitions, 46 changer transitions 0/636 dead transitions. [2023-08-29 23:27:06,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 636 transitions, 5095 flow [2023-08-29 23:27:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 23:27:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 23:27:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5939 transitions. [2023-08-29 23:27:06,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41554715924993 [2023-08-29 23:27:06,699 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5939 transitions. [2023-08-29 23:27:06,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5939 transitions. [2023-08-29 23:27:06,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:06,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5939 transitions. [2023-08-29 23:27:06,704 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) [2023-08-29 23:27:06,710 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) [2023-08-29 23:27:06,711 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) [2023-08-29 23:27:06,711 INFO L175 Difference]: Start difference. First operand has 164 places, 100 transitions, 850 flow. Second operand 36 states and 5939 transitions. [2023-08-29 23:27:06,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 636 transitions, 5095 flow [2023-08-29 23:27:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 636 transitions, 5049 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-29 23:27:12,442 INFO L231 Difference]: Finished difference. Result has 197 places, 111 transitions, 1035 flow [2023-08-29 23:27:12,442 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} [2023-08-29 23:27:12,443 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 137 predicate places. [2023-08-29 23:27:12,443 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 111 transitions, 1035 flow [2023-08-29 23:27:12,443 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) [2023-08-29 23:27:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:12,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:12,650 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:27:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -694757469, now seen corresponding path program 5 times [2023-08-29 23:27:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757936763] [2023-08-29 23:27:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:27:12,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:12,652 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:12,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-29 23:27:12,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:27:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:27:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:12,858 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:27:12,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:27:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 23:27:13,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-08-29 23:27:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:27:13,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:27:13,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-29 23:27:13,375 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-29 23:27:13,378 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-29 23:27:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:14,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757936763] [2023-08-29 23:27:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757936763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:27:14,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:27:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2023-08-29 23:27:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863208828] [2023-08-29 23:27:14,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:27:14,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 23:27:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 23:27:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-08-29 23:27:27,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-29 23:27:27,389 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) [2023-08-29 23:27:27,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:27,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-29 23:27:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:40,493 INFO L130 PetriNetUnfolder]: 47467/68001 cut-off events. [2023-08-29 23:27:40,493 INFO L131 PetriNetUnfolder]: For 286304/286304 co-relation queries the response was YES. [2023-08-29 23:27:41,099 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. [2023-08-29 23:27:41,321 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 361 selfloop transitions, 38 changer transitions 0/399 dead transitions. [2023-08-29 23:27:41,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 399 transitions, 3349 flow [2023-08-29 23:27:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:27:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:27:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3770 transitions. [2023-08-29 23:27:41,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41287920271602235 [2023-08-29 23:27:41,356 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3770 transitions. [2023-08-29 23:27:41,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3770 transitions. [2023-08-29 23:27:41,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:41,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3770 transitions. [2023-08-29 23:27:41,361 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) [2023-08-29 23:27:41,365 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) [2023-08-29 23:27:41,366 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) [2023-08-29 23:27:41,366 INFO L175 Difference]: Start difference. First operand has 197 places, 111 transitions, 1035 flow. Second operand 23 states and 3770 transitions. [2023-08-29 23:27:41,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 399 transitions, 3349 flow [2023-08-29 23:27:50,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 399 transitions, 3134 flow, removed 37 selfloop flow, removed 31 redundant places. [2023-08-29 23:27:50,137 INFO L231 Difference]: Finished difference. Result has 189 places, 125 transitions, 1040 flow [2023-08-29 23:27:50,137 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} [2023-08-29 23:27:50,137 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 129 predicate places. [2023-08-29 23:27:50,137 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 125 transitions, 1040 flow [2023-08-29 23:27:50,138 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) [2023-08-29 23:27:50,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:50,138 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:50,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:50,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:50,346 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:27:50,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425492, now seen corresponding path program 3 times [2023-08-29 23:27:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:27:50,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852698351] [2023-08-29 23:27:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:27:50,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:27:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:27:50,348 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:27:50,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-29 23:27:50,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:27:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:27:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:50,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:27:50,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:27:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:50,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:27:50,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-29 23:27:50,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-29 23:27:50,978 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-29 23:27:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:51,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:27:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852698351] [2023-08-29 23:27:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852698351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:27:51,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:27:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-08-29 23:27:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220004795] [2023-08-29 23:27:51,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:27:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:27:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:27:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:27:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:27:58,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 397 [2023-08-29 23:27:58,606 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) [2023-08-29 23:27:58,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:58,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 397 [2023-08-29 23:27:58,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:12,919 INFO L130 PetriNetUnfolder]: 46623/66957 cut-off events. [2023-08-29 23:28:12,919 INFO L131 PetriNetUnfolder]: For 290328/290328 co-relation queries the response was YES. [2023-08-29 23:28:13,458 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. [2023-08-29 23:28:13,674 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 440 selfloop transitions, 34 changer transitions 0/474 dead transitions. [2023-08-29 23:28:13,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 474 transitions, 3910 flow [2023-08-29 23:28:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:28:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:28:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3498 transitions. [2023-08-29 23:28:13,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195753868297949 [2023-08-29 23:28:13,679 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3498 transitions. [2023-08-29 23:28:13,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3498 transitions. [2023-08-29 23:28:13,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:13,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3498 transitions. [2023-08-29 23:28:13,682 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) [2023-08-29 23:28:13,686 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) [2023-08-29 23:28:13,686 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) [2023-08-29 23:28:13,686 INFO L175 Difference]: Start difference. First operand has 189 places, 125 transitions, 1040 flow. Second operand 21 states and 3498 transitions. [2023-08-29 23:28:13,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 474 transitions, 3910 flow [2023-08-29 23:28:22,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 474 transitions, 3800 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-29 23:28:22,550 INFO L231 Difference]: Finished difference. Result has 204 places, 127 transitions, 1142 flow [2023-08-29 23:28:22,550 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} [2023-08-29 23:28:22,550 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 144 predicate places. [2023-08-29 23:28:22,551 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 127 transitions, 1142 flow [2023-08-29 23:28:22,551 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) [2023-08-29 23:28:22,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:22,551 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:22,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-29 23:28:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:28:22,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:28:22,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2026595935, now seen corresponding path program 4 times [2023-08-29 23:28:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:28:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900228274] [2023-08-29 23:28:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:28:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:28:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:28:22,761 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:28:22,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-29 23:28:22,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:28:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:28:22,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:22,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:28:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:28:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:23,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:24,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:28:24,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900228274] [2023-08-29 23:28:24,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900228274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:24,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:28:24,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-29 23:28:24,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212937290] [2023-08-29 23:28:24,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:24,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:28:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:28:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:28:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:28:35,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-29 23:28:35,523 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) [2023-08-29 23:28:35,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:35,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-29 23:28:35,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:05,993 INFO L130 PetriNetUnfolder]: 73131/102997 cut-off events. [2023-08-29 23:29:05,994 INFO L131 PetriNetUnfolder]: For 543435/543435 co-relation queries the response was YES. [2023-08-29 23:29:07,029 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. [2023-08-29 23:29:07,430 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 628 selfloop transitions, 58 changer transitions 0/686 dead transitions. [2023-08-29 23:29:07,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 686 transitions, 5340 flow [2023-08-29 23:29:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 23:29:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 23:29:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6081 transitions. [2023-08-29 23:29:07,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41398325277418474 [2023-08-29 23:29:07,444 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6081 transitions. [2023-08-29 23:29:07,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6081 transitions. [2023-08-29 23:29:07,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:07,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6081 transitions. [2023-08-29 23:29:07,470 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) [2023-08-29 23:29:07,482 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) [2023-08-29 23:29:07,483 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) [2023-08-29 23:29:07,483 INFO L175 Difference]: Start difference. First operand has 204 places, 127 transitions, 1142 flow. Second operand 37 states and 6081 transitions. [2023-08-29 23:29:07,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 686 transitions, 5340 flow [2023-08-29 23:29:15,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 686 transitions, 5259 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-08-29 23:29:15,178 INFO L231 Difference]: Finished difference. Result has 236 places, 138 transitions, 1327 flow [2023-08-29 23:29:15,178 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} [2023-08-29 23:29:15,178 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 176 predicate places. [2023-08-29 23:29:15,178 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 138 transitions, 1327 flow [2023-08-29 23:29:15,179 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) [2023-08-29 23:29:15,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:29:15,179 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 23:29:15,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-29 23:29:15,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:29:15,384 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:29:15,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:29:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1856037898, now seen corresponding path program 6 times [2023-08-29 23:29:15,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:29:15,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879199404] [2023-08-29 23:29:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:29:15,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:29:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:29:15,386 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:29:15,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-29 23:29:15,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-29 23:29:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:29:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:29:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:29:15,859 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:29:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:29:15,986 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 [2023-08-29 23:29:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 23:29:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:29:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 23:29:17,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:29:17,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879199404] [2023-08-29 23:29:17,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879199404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:29:17,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:29:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-08-29 23:29:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695330723] [2023-08-29 23:29:17,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:29:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:29:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:29:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:29:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:29:23,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 397 [2023-08-29 23:29:23,667 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) [2023-08-29 23:29:23,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:23,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 397 [2023-08-29 23:29:23,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:42,871 INFO L130 PetriNetUnfolder]: 70117/98957 cut-off events. [2023-08-29 23:29:42,872 INFO L131 PetriNetUnfolder]: For 638774/638774 co-relation queries the response was YES. [2023-08-29 23:29:43,920 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. [2023-08-29 23:29:44,436 INFO L137 encePairwiseOnDemand]: 390/397 looper letters, 609 selfloop transitions, 49 changer transitions 0/658 dead transitions. [2023-08-29 23:29:44,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 658 transitions, 6867 flow [2023-08-29 23:29:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 23:29:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 23:29:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6178 transitions. [2023-08-29 23:29:44,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058683368507044 [2023-08-29 23:29:44,441 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6178 transitions. [2023-08-29 23:29:44,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6178 transitions. [2023-08-29 23:29:44,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:44,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6178 transitions. [2023-08-29 23:29:44,447 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) [2023-08-29 23:29:44,453 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) [2023-08-29 23:29:44,454 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) [2023-08-29 23:29:44,455 INFO L175 Difference]: Start difference. First operand has 236 places, 138 transitions, 1327 flow. Second operand 37 states and 6178 transitions. [2023-08-29 23:29:44,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 658 transitions, 6867 flow [2023-08-29 23:29:59,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 658 transitions, 5356 flow, removed 460 selfloop flow, removed 25 redundant places. [2023-08-29 23:29:59,051 INFO L231 Difference]: Finished difference. Result has 252 places, 153 transitions, 1309 flow [2023-08-29 23:29:59,051 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} [2023-08-29 23:29:59,054 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 192 predicate places. [2023-08-29 23:29:59,054 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 153 transitions, 1309 flow [2023-08-29 23:29:59,055 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) [2023-08-29 23:29:59,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:29:59,055 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1] [2023-08-29 23:29:59,068 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 [2023-08-29 23:29:59,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:29:59,265 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:29:59,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:29:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1918483722, now seen corresponding path program 7 times [2023-08-29 23:29:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:29:59,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310411554] [2023-08-29 23:29:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:29:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:29:59,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:29:59,267 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:29:59,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-29 23:29:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 23:29:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:29:59,516 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:29:59,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:30:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:30:00,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:30:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:30:03,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:30:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310411554] [2023-08-29 23:30:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310411554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:30:03,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:30:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 37 [2023-08-29 23:30:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993487982] [2023-08-29 23:30:03,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:30:03,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-29 23:30:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:30:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-29 23:30:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2023-08-29 23:30:34,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 397 [2023-08-29 23:30:34,009 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) [2023-08-29 23:30:34,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:30:34,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 397 [2023-08-29 23:30:34,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:31:25,728 INFO L130 PetriNetUnfolder]: 72355/103037 cut-off events. [2023-08-29 23:31:25,729 INFO L131 PetriNetUnfolder]: For 633944/633944 co-relation queries the response was YES. [2023-08-29 23:31:26,857 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. [2023-08-29 23:31:27,240 INFO L137 encePairwiseOnDemand]: 387/397 looper letters, 1585 selfloop transitions, 127 changer transitions 0/1712 dead transitions. [2023-08-29 23:31:27,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1712 transitions, 14669 flow [2023-08-29 23:31:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-29 23:31:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-29 23:31:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 12707 transitions. [2023-08-29 23:31:27,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051589452539617 [2023-08-29 23:31:27,283 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 12707 transitions. [2023-08-29 23:31:27,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 12707 transitions. [2023-08-29 23:31:27,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:31:27,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 12707 transitions. [2023-08-29 23:31:27,317 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) [2023-08-29 23:31:27,339 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) [2023-08-29 23:31:27,341 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) [2023-08-29 23:31:27,341 INFO L175 Difference]: Start difference. First operand has 252 places, 153 transitions, 1309 flow. Second operand 79 states and 12707 transitions. [2023-08-29 23:31:27,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1712 transitions, 14669 flow [2023-08-29 23:31:55,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1712 transitions, 14600 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-08-29 23:31:55,462 INFO L231 Difference]: Finished difference. Result has 321 places, 217 transitions, 2173 flow [2023-08-29 23:31:55,462 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} [2023-08-29 23:31:55,462 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 261 predicate places. [2023-08-29 23:31:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 217 transitions, 2173 flow [2023-08-29 23:31:55,463 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) [2023-08-29 23:31:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:31:55,463 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:31:55,475 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 (30)] Ended with exit code 0 [2023-08-29 23:31:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:31:55,676 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:31:55,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:31:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1932636167, now seen corresponding path program 5 times [2023-08-29 23:31:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:31:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997788222] [2023-08-29 23:31:55,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:31:55,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:31:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:31:55,678 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:31:55,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-29 23:31:55,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-29 23:31:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:31:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-29 23:31:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:31:55,992 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 23:31:55,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 23:31:56,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 23:31:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:31:56,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:31:56,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-08-29 23:31:56,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2023-08-29 23:31:56,748 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-29 23:31:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:59,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:31:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997788222] [2023-08-29 23:31:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997788222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:31:59,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:31:59,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 34 [2023-08-29 23:31:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817676116] [2023-08-29 23:31:59,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:31:59,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-29 23:31:59,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:31:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-29 23:31:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-08-29 23:32:32,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 397 [2023-08-29 23:32:32,521 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) [2023-08-29 23:32:32,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:32:32,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 397 [2023-08-29 23:32:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:33:16,399 INFO L130 PetriNetUnfolder]: 73727/106305 cut-off events. [2023-08-29 23:33:16,400 INFO L131 PetriNetUnfolder]: For 837260/837260 co-relation queries the response was YES. [2023-08-29 23:33:17,540 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. [2023-08-29 23:33:17,886 INFO L137 encePairwiseOnDemand]: 388/397 looper letters, 1143 selfloop transitions, 114 changer transitions 0/1257 dead transitions. [2023-08-29 23:33:17,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1257 transitions, 12787 flow [2023-08-29 23:33:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-29 23:33:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-29 23:33:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 8908 transitions. [2023-08-29 23:33:17,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415523836178748 [2023-08-29 23:33:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 8908 transitions. [2023-08-29 23:33:17,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 8908 transitions. [2023-08-29 23:33:17,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:33:17,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 8908 transitions. [2023-08-29 23:33:17,899 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) [2023-08-29 23:33:17,908 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) [2023-08-29 23:33:17,909 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) [2023-08-29 23:33:17,909 INFO L175 Difference]: Start difference. First operand has 321 places, 217 transitions, 2173 flow. Second operand 54 states and 8908 transitions. [2023-08-29 23:33:17,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1257 transitions, 12787 flow [2023-08-29 23:34:00,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1257 transitions, 10786 flow, removed 508 selfloop flow, removed 45 redundant places. [2023-08-29 23:34:00,950 INFO L231 Difference]: Finished difference. Result has 341 places, 266 transitions, 2554 flow [2023-08-29 23:34:00,951 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} [2023-08-29 23:34:00,951 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 281 predicate places. [2023-08-29 23:34:00,951 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 266 transitions, 2554 flow [2023-08-29 23:34:00,952 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) [2023-08-29 23:34:00,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:34:00,952 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] [2023-08-29 23:34:00,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-29 23:34:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:34:01,162 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:34:01,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:34:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 929375108, now seen corresponding path program 1 times [2023-08-29 23:34:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:34:01,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060083941] [2023-08-29 23:34:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:34:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:34:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:34:01,164 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:34:01,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-29 23:34:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:34:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:34:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:34:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:34:01,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:34:01,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:34:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060083941] [2023-08-29 23:34:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060083941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:34:01,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:34:01,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:34:01,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128659319] [2023-08-29 23:34:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:34:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:34:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:34:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:34:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:34:01,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 397 [2023-08-29 23:34:01,373 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) [2023-08-29 23:34:01,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:34:01,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 397 [2023-08-29 23:34:01,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:34:23,346 INFO L130 PetriNetUnfolder]: 91276/133856 cut-off events. [2023-08-29 23:34:23,346 INFO L131 PetriNetUnfolder]: For 910176/910176 co-relation queries the response was YES. [2023-08-29 23:34:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685827 conditions, 133856 events. 91276/133856 cut-off events. For 910176/910176 co-relation queries the response was YES. Maximal size of possible extension queue 2275. Compared 958809 event pairs, 12654 based on Foata normal form. 162/134018 useless extension candidates. Maximal degree in co-relation 685737. Up to 94218 conditions per place. [2023-08-29 23:34:25,648 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 492 selfloop transitions, 22 changer transitions 153/667 dead transitions. [2023-08-29 23:34:25,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 667 transitions, 7523 flow [2023-08-29 23:34:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:34:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:34:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 903 transitions. [2023-08-29 23:34:25,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454911838790932 [2023-08-29 23:34:25,650 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 903 transitions. [2023-08-29 23:34:25,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 903 transitions. [2023-08-29 23:34:25,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:34:25,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 903 transitions. [2023-08-29 23:34:25,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:25,651 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) [2023-08-29 23:34:25,651 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) [2023-08-29 23:34:25,652 INFO L175 Difference]: Start difference. First operand has 341 places, 266 transitions, 2554 flow. Second operand 5 states and 903 transitions. [2023-08-29 23:34:25,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 667 transitions, 7523 flow [2023-08-29 23:36:12,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 667 transitions, 7061 flow, removed 90 selfloop flow, removed 30 redundant places. [2023-08-29 23:36:12,282 INFO L231 Difference]: Finished difference. Result has 317 places, 269 transitions, 2394 flow [2023-08-29 23:36:12,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2394, PETRI_PLACES=317, PETRI_TRANSITIONS=269} [2023-08-29 23:36:12,283 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 257 predicate places. [2023-08-29 23:36:12,283 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 269 transitions, 2394 flow [2023-08-29 23:36:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-29 23:36:12,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:12,284 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] [2023-08-29 23:36:12,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:12,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:36:12,491 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-29 23:36:12,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -223291108, now seen corresponding path program 2 times [2023-08-29 23:36:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:36:12,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977996245] [2023-08-29 23:36:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:36:12,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:36:12,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:36:12,494 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:36:12,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-29 23:36:12,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:36:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:36:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:13,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 23:36:13,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 119 [2023-08-29 23:36:13,130 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 119 treesize of output 111 [2023-08-29 23:36:13,132 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 111 treesize of output 103 [2023-08-29 23:36:19,236 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:36:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:36:19,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:21,902 INFO L321 Elim1Store]: treesize reduction 168, result has 2.9 percent of original size [2023-08-29 23:36:21,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 221 treesize of output 99 [2023-08-29 23:36:21,917 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 93 treesize of output 87 [2023-08-29 23:36:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:36:22,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:36:22,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977996245] [2023-08-29 23:36:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977996245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:22,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:36:22,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-29 23:36:22,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493976864] [2023-08-29 23:36:22,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:22,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:36:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:36:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:36:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2023-08-29 23:36:24,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:26,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:28,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:30,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:32,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:34,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:36,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:38,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:40,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:42,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:44,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:46,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:48,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:50,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:52,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:54,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:56,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:36:58,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:01,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:03,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:05,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:07,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:09,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:11,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:13,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:15,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:17,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:19,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:21,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:23,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:25,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:27,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:29,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:31,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:33,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:36,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:38,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:40,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:42,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:44,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-29 23:37:44,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 397 [2023-08-29 23:37:44,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 269 transitions, 2394 flow. Second operand has 12 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:44,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:44,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 397 [2023-08-29 23:37:44,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:51,418 WARN L222 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:37:57,679 WARN L222 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:38:03,887 WARN L222 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15