./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-3.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/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:19:46,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:19:46,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:19:46,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:19:46,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:19:46,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:19:46,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:19:46,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:19:46,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:19:46,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:19:46,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:19:46,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:19:46,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:19:46,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:19:46,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:19:46,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:19:46,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:19:46,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:19:46,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:19:46,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:19:46,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:19:46,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:19:46,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:19:46,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:19:46,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:19:46,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:19:46,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:19:46,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:19:46,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:19:46,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:19:46,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:19:46,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:19:46,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:19:46,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:19:46,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:19:46,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:19:46,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:19:46,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:19:46,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:19:46,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:19:46,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:19:46,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:19:46,778 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:19:46,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:19:46,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:19:46,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:19:46,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:19:46,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:19:46,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:19:46,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:19:46,782 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:19:46,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:19:46,783 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:19:46,783 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:19:46,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:19:46,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:19:46,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:19:46,784 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:19:46,784 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:19:46,785 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:19:46,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:19:46,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:19:46,785 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:19:46,785 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:19:46,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:19:46,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:19:46,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:19:46,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:19:46,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:19:46,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:19:46,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:19:46,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:19:46,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:19:46,788 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:19:46,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:19:46,789 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:19:46,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:19:47,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:19:47,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:19:47,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:19:47,173 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:19:47,173 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:19:47,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 01:19:48,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:19:48,668 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:19:48,668 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 01:19:48,675 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7646aa574/488f10b3191744a3b16caadf9fd38e82/FLAG69ff6eb67 [2023-08-30 01:19:48,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7646aa574/488f10b3191744a3b16caadf9fd38e82 [2023-08-30 01:19:48,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:19:48,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:19:48,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:19:48,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:19:48,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:19:48,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:19:48" (1/1) ... [2023-08-30 01:19:48,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c364f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:48, skipping insertion in model container [2023-08-30 01:19:48,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:19:48" (1/1) ... [2023-08-30 01:19:48,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:19:48,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:19:48,926 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/unroll-3.wvr.c[2500,2513] [2023-08-30 01:19:48,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:19:48,955 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:19:48,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2bef2bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:48, skipping insertion in model container [2023-08-30 01:19:48,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:19:48,958 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:19:48,960 INFO L158 Benchmark]: Toolchain (without parser) took 260.19ms. Allocated memory is still 71.3MB. Free memory was 48.7MB in the beginning and 39.0MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:19:48,961 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:19:48,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.64ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 39.0MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:19:48,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 34.0MB in the beginning and 33.9MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.64ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 39.0MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:19:50,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:19:50,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:19:50,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:19:50,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:19:50,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:19:50,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:19:50,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:19:50,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:19:50,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:19:50,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:19:50,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:19:50,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:19:50,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:19:50,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:19:50,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:19:50,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:19:50,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:19:50,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:19:50,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:19:50,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:19:50,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:19:50,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:19:50,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:19:50,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:19:50,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:19:50,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:19:50,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:19:50,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:19:50,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:19:50,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:19:50,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:19:50,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:19:50,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:19:50,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:19:50,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:19:50,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:19:50,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:19:50,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:19:50,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:19:50,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:19:50,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:19:50,837 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:19:50,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:19:50,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:19:50,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:19:50,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:19:50,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:19:50,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:19:50,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:19:50,840 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:19:50,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:19:50,841 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:19:50,842 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:19:50,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:19:50,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:19:50,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:19:50,842 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:19:50,843 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:19:50,843 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:19:50,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:19:50,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:19:50,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:19:50,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:19:50,844 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:19:50,844 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:19:50,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:19:50,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:19:50,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:19:50,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:19:50,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:19:50,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:19:50,845 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:19:50,846 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:19:50,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:19:50,846 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:19:50,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:19:50,847 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:19:50,847 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:19:50,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:19:51,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:19:51,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:19:51,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:19:51,179 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:19:51,180 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:19:51,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 01:19:52,409 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:19:52,638 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:19:52,639 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 01:19:52,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d08f0ec9/14e29745177a47b99582864efaf39b51/FLAG08eb0226c [2023-08-30 01:19:52,655 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d08f0ec9/14e29745177a47b99582864efaf39b51 [2023-08-30 01:19:52,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:19:52,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:19:52,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:19:52,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:19:52,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:19:52,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:52,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c25f858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52, skipping insertion in model container [2023-08-30 01:19:52,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:52,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:19:52,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:19:52,822 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/unroll-3.wvr.c[2500,2513] [2023-08-30 01:19:52,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:19:52,842 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:19:52,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:19:52,864 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/unroll-3.wvr.c[2500,2513] [2023-08-30 01:19:52,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:19:52,872 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:19:52,890 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/unroll-3.wvr.c[2500,2513] [2023-08-30 01:19:52,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:19:52,908 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:19:52,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52 WrapperNode [2023-08-30 01:19:52,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:19:52,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:19:52,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:19:52,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:19:52,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:52,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:52,973 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 145 [2023-08-30 01:19:52,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:19:52,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:19:52,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:19:52,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:19:52,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:52,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:19:53,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:19:53,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:19:53,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:19:53,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (1/1) ... [2023-08-30 01:19:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:19:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:19:53,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:19:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:19:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:19:53,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:19:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:19:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:19:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:19:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:19:53,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:19:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:19:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:19:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:19:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:19:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:19:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:19:53,129 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:19:53,268 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:19:53,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:19:53,707 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:19:53,719 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:19:53,720 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:19:53,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:19:53 BoogieIcfgContainer [2023-08-30 01:19:53,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:19:53,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:19:53,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:19:53,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:19:53,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:19:52" (1/3) ... [2023-08-30 01:19:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72270719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:19:53, skipping insertion in model container [2023-08-30 01:19:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:19:52" (2/3) ... [2023-08-30 01:19:53,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72270719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:19:53, skipping insertion in model container [2023-08-30 01:19:53,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:19:53" (3/3) ... [2023-08-30 01:19:53,730 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-08-30 01:19:53,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:19:53,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-08-30 01:19:53,747 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:19:53,898 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:19:53,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 190 transitions, 396 flow [2023-08-30 01:19:54,012 INFO L130 PetriNetUnfolder]: 15/188 cut-off events. [2023-08-30 01:19:54,013 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:19:54,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 262 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:19:54,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 190 transitions, 396 flow [2023-08-30 01:19:54,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 184 transitions, 380 flow [2023-08-30 01:19:54,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:19:54,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 184 transitions, 380 flow [2023-08-30 01:19:54,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 184 transitions, 380 flow [2023-08-30 01:19:54,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 184 transitions, 380 flow [2023-08-30 01:19:54,082 INFO L130 PetriNetUnfolder]: 15/184 cut-off events. [2023-08-30 01:19:54,083 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:19:54,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 15/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 244 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-08-30 01:19:54,086 INFO L119 LiptonReduction]: Number of co-enabled transitions 3708 [2023-08-30 01:20:11,289 INFO L134 LiptonReduction]: Checked pairs total: 3611 [2023-08-30 01:20:11,295 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-30 01:20:11,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:20:11,313 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;@3e998cbc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:20:11,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-30 01:20:11,316 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:20:11,316 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:20:11,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:11,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:20:11,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:11,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 23967, now seen corresponding path program 1 times [2023-08-30 01:20:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239748084] [2023-08-30 01:20:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:11,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:11,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:11,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 01:20:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:11,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:20:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:11,549 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:20:11,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:20:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:11,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:11,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:11,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239748084] [2023-08-30 01:20:11,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239748084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:11,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:11,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218366616] [2023-08-30 01:20:11,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:11,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-08-30 01:20:11,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:11,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:11,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-08-30 01:20:11,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:12,040 INFO L130 PetriNetUnfolder]: 457/652 cut-off events. [2023-08-30 01:20:12,040 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 01:20:12,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 652 events. 457/652 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2728 event pairs, 216 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 1138. Up to 646 conditions per place. [2023-08-30 01:20:12,046 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 01:20:12,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 136 flow [2023-08-30 01:20:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 01:20:12,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503367003367003 [2023-08-30 01:20:12,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 01:20:12,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 01:20:12,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:12,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 01:20:12,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,078 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 84 flow. Second operand 3 states and 535 transitions. [2023-08-30 01:20:12,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 136 flow [2023-08-30 01:20:12,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:20:12,083 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-08-30 01:20:12,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-30 01:20:12,088 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-08-30 01:20:12,088 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-08-30 01:20:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:12,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:20:12,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:12,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:12,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:12,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash 24051, now seen corresponding path program 1 times [2023-08-30 01:20:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:12,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095587606] [2023-08-30 01:20:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:12,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:12,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:12,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 01:20:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:20:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:12,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:12,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:12,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095587606] [2023-08-30 01:20:12,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095587606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:12,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:12,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445234334] [2023-08-30 01:20:12,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:12,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-08-30 01:20:12,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:12,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-08-30 01:20:12,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:12,767 INFO L130 PetriNetUnfolder]: 457/654 cut-off events. [2023-08-30 01:20:12,768 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:20:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 654 events. 457/654 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2755 event pairs, 216 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 1306. Up to 647 conditions per place. [2023-08-30 01:20:12,772 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 01:20:12,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 138 flow [2023-08-30 01:20:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-30 01:20:12,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562289562289562 [2023-08-30 01:20:12,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-30 01:20:12,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-30 01:20:12,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:12,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-30 01:20:12,783 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) [2023-08-30 01:20:12,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,787 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 542 transitions. [2023-08-30 01:20:12,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 138 flow [2023-08-30 01:20:12,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:12,789 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 85 flow [2023-08-30 01:20:12,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-30 01:20:12,790 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-08-30 01:20:12,790 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 85 flow [2023-08-30 01:20:12,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:12,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:12,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:20:12,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:13,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:13,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:13,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 23966, now seen corresponding path program 1 times [2023-08-30 01:20:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:13,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98031680] [2023-08-30 01:20:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:13,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:13,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:13,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 01:20:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:20:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:13,137 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:13,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:13,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:13,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98031680] [2023-08-30 01:20:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98031680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:13,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801239890] [2023-08-30 01:20:13,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-08-30 01:20:13,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:13,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:13,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-08-30 01:20:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:13,565 INFO L130 PetriNetUnfolder]: 457/653 cut-off events. [2023-08-30 01:20:13,565 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:20:13,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 653 events. 457/653 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 2718 event pairs, 216 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 1310. Up to 647 conditions per place. [2023-08-30 01:20:13,569 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 01:20:13,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 147 flow [2023-08-30 01:20:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-30 01:20:13,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44865319865319864 [2023-08-30 01:20:13,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-30 01:20:13,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-30 01:20:13,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:13,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-30 01:20:13,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:13,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:13,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:13,576 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 85 flow. Second operand 3 states and 533 transitions. [2023-08-30 01:20:13,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 147 flow [2023-08-30 01:20:13,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:13,578 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 89 flow [2023-08-30 01:20:13,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-30 01:20:13,579 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-08-30 01:20:13,579 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 89 flow [2023-08-30 01:20:13,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:13,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:13,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:20:13,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:13,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:13,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:13,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash 745832, now seen corresponding path program 1 times [2023-08-30 01:20:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:13,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673908036] [2023-08-30 01:20:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:13,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:13,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:13,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:13,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 01:20:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:20:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:13,927 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:13,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:13,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:14,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673908036] [2023-08-30 01:20:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673908036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:14,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:20:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890198286] [2023-08-30 01:20:14,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:20:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:20:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:20:15,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2023-08-30 01:20:15,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:15,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:15,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2023-08-30 01:20:15,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:15,875 INFO L130 PetriNetUnfolder]: 919/1311 cut-off events. [2023-08-30 01:20:15,875 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:20:15,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 1311 events. 919/1311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 6221 event pairs, 432 based on Foata normal form. 3/327 useless extension candidates. Maximal degree in co-relation 2639. Up to 650 conditions per place. [2023-08-30 01:20:15,883 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 56 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2023-08-30 01:20:15,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 323 flow [2023-08-30 01:20:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:20:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:20:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1042 transitions. [2023-08-30 01:20:15,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385521885521885 [2023-08-30 01:20:15,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1042 transitions. [2023-08-30 01:20:15,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1042 transitions. [2023-08-30 01:20:15,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:15,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1042 transitions. [2023-08-30 01:20:15,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.66666666666666) internal successors, (1042), 6 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:15,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:15,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:15,895 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 89 flow. Second operand 6 states and 1042 transitions. [2023-08-30 01:20:15,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 323 flow [2023-08-30 01:20:15,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:20:15,897 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 183 flow [2023-08-30 01:20:15,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-30 01:20:15,898 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-30 01:20:15,898 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 183 flow [2023-08-30 01:20:15,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:15,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:15,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:20:15,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:16,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:16,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 745917, now seen corresponding path program 1 times [2023-08-30 01:20:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207385083] [2023-08-30 01:20:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:16,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:16,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:16,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 01:20:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:16,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:20:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:16,197 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 01:20:16,198 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 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 01:20:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:16,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:16,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207385083] [2023-08-30 01:20:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207385083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337618339] [2023-08-30 01:20:16,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:16,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:20:16,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:16,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:16,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:20:16,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:16,594 INFO L130 PetriNetUnfolder]: 695/1015 cut-off events. [2023-08-30 01:20:16,594 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:20:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2083 conditions, 1015 events. 695/1015 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 4789 event pairs, 326 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 2069. Up to 1003 conditions per place. [2023-08-30 01:20:16,599 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-30 01:20:16,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 229 flow [2023-08-30 01:20:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-30 01:20:16,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-08-30 01:20:16,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-30 01:20:16,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-30 01:20:16,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:16,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-30 01:20:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:16,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:16,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:16,607 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 183 flow. Second operand 3 states and 522 transitions. [2023-08-30 01:20:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 229 flow [2023-08-30 01:20:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 213 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:16,611 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 143 flow [2023-08-30 01:20:16,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-30 01:20:16,614 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-30 01:20:16,615 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 143 flow [2023-08-30 01:20:16,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:16,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:16,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:20:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:16,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:16,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 745918, now seen corresponding path program 1 times [2023-08-30 01:20:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389087733] [2023-08-30 01:20:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:16,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:16,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:20:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:20:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:16,964 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 01:20:16,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 01:20:16,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 01:20:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:17,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:17,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:17,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389087733] [2023-08-30 01:20:17,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389087733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:17,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:17,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203906384] [2023-08-30 01:20:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:17,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:17,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-08-30 01:20:17,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:17,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-08-30 01:20:17,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:17,418 INFO L130 PetriNetUnfolder]: 471/719 cut-off events. [2023-08-30 01:20:17,418 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:20:17,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 719 events. 471/719 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 3349 event pairs, 220 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 1460. Up to 707 conditions per place. [2023-08-30 01:20:17,421 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 01:20:17,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 185 flow [2023-08-30 01:20:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-08-30 01:20:17,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452861952861953 [2023-08-30 01:20:17,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-08-30 01:20:17,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-08-30 01:20:17,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:17,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-08-30 01:20:17,426 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) [2023-08-30 01:20:17,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,428 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 143 flow. Second operand 3 states and 529 transitions. [2023-08-30 01:20:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 185 flow [2023-08-30 01:20:17,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:17,430 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 122 flow [2023-08-30 01:20:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-30 01:20:17,431 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-30 01:20:17,431 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 122 flow [2023-08-30 01:20:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:17,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:20:17,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:17,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:17,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 716841913, now seen corresponding path program 1 times [2023-08-30 01:20:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042320334] [2023-08-30 01:20:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:17,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:17,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 01:20:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:20:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:17,744 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:20:17,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 01:20:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:17,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:17,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042320334] [2023-08-30 01:20:17,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042320334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:17,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:17,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208279713] [2023-08-30 01:20:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:17,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:17,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:20:17,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:17,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:17,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:20:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:18,074 INFO L130 PetriNetUnfolder]: 433/657 cut-off events. [2023-08-30 01:20:18,074 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:20:18,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 657 events. 433/657 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 3005 event pairs, 202 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 1336. Up to 645 conditions per place. [2023-08-30 01:20:18,078 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 01:20:18,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 178 flow [2023-08-30 01:20:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 01:20:18,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43602693602693604 [2023-08-30 01:20:18,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 01:20:18,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 01:20:18,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:18,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 01:20:18,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,084 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 122 flow. Second operand 3 states and 518 transitions. [2023-08-30 01:20:18,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 178 flow [2023-08-30 01:20:18,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:18,086 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 119 flow [2023-08-30 01:20:18,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 01:20:18,087 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-30 01:20:18,087 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 119 flow [2023-08-30 01:20:18,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:18,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:20:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:18,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:18,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:18,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 716841914, now seen corresponding path program 1 times [2023-08-30 01:20:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:18,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484055228] [2023-08-30 01:20:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:18,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:18,300 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:20:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:20:18,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:20:18,404 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 01:20:18,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 01:20:18,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 01:20:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:18,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:18,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484055228] [2023-08-30 01:20:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484055228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:18,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:18,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:20:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836774506] [2023-08-30 01:20:18,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:20:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:20:18,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:20:18,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2023-08-30 01:20:18,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:18,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2023-08-30 01:20:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:18,713 INFO L130 PetriNetUnfolder]: 395/595 cut-off events. [2023-08-30 01:20:18,713 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:20:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 595 events. 395/595 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 2621 event pairs, 184 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 1212. Up to 583 conditions per place. [2023-08-30 01:20:18,716 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 01:20:18,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 171 flow [2023-08-30 01:20:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:20:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:20:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-30 01:20:18,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2023-08-30 01:20:18,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-30 01:20:18,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-30 01:20:18,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:18,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-30 01:20:18,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,723 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 119 flow. Second operand 3 states and 525 transitions. [2023-08-30 01:20:18,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 171 flow [2023-08-30 01:20:18,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:18,725 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 116 flow [2023-08-30 01:20:18,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 01:20:18,725 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-30 01:20:18,725 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 116 flow [2023-08-30 01:20:18,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:18,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:18,726 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:20:18,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:18,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:18,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash 747110430, now seen corresponding path program 2 times [2023-08-30 01:20:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:18,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212658574] [2023-08-30 01:20:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:20:18,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:18,938 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:18,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 01:20:19,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:20:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:20:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:19,075 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:19,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:19,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212658574] [2023-08-30 01:20:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212658574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:19,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:19,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:20:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014988221] [2023-08-30 01:20:19,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:20:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:20:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:20:22,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2023-08-30 01:20:22,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 116 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:22,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:22,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2023-08-30 01:20:22,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:26,067 INFO L130 PetriNetUnfolder]: 1766/2651 cut-off events. [2023-08-30 01:20:26,067 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-30 01:20:26,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2651 events. 1766/2651 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14337 event pairs, 828 based on Foata normal form. 6/1014 useless extension candidates. Maximal degree in co-relation 5342. Up to 289 conditions per place. [2023-08-30 01:20:26,079 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 173 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2023-08-30 01:20:26,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 187 transitions, 874 flow [2023-08-30 01:20:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:20:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:20:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2147 transitions. [2023-08-30 01:20:26,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45180976430976433 [2023-08-30 01:20:26,087 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2147 transitions. [2023-08-30 01:20:26,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2147 transitions. [2023-08-30 01:20:26,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:26,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2147 transitions. [2023-08-30 01:20:26,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 178.91666666666666) internal successors, (2147), 12 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:26,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:26,100 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:26,100 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 116 flow. Second operand 12 states and 2147 transitions. [2023-08-30 01:20:26,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 187 transitions, 874 flow [2023-08-30 01:20:26,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 187 transitions, 873 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:20:26,103 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 201 flow [2023-08-30 01:20:26,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-30 01:20:26,104 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2023-08-30 01:20:26,104 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 201 flow [2023-08-30 01:20:26,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:26,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:26,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:20:26,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:26,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:26,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:26,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 747256410, now seen corresponding path program 1 times [2023-08-30 01:20:26,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:26,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060652900] [2023-08-30 01:20:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:26,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:26,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 01:20:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:20:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:26,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:26,579 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 35 treesize of output 31 [2023-08-30 01:20:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:26,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:26,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060652900] [2023-08-30 01:20:26,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060652900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:26,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:26,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:20:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198917653] [2023-08-30 01:20:26,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:26,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:20:26,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:20:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:20:27,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 396 [2023-08-30 01:20:27,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 201 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:27,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:27,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 396 [2023-08-30 01:20:27,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:28,984 INFO L130 PetriNetUnfolder]: 2333/3659 cut-off events. [2023-08-30 01:20:28,984 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 01:20:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7451 conditions, 3659 events. 2333/3659 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23221 event pairs, 522 based on Foata normal form. 0/1469 useless extension candidates. Maximal degree in co-relation 7425. Up to 2260 conditions per place. [2023-08-30 01:20:29,008 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 59 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-08-30 01:20:29,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 420 flow [2023-08-30 01:20:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:20:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:20:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1173 transitions. [2023-08-30 01:20:29,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231601731601732 [2023-08-30 01:20:29,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1173 transitions. [2023-08-30 01:20:29,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1173 transitions. [2023-08-30 01:20:29,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:29,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1173 transitions. [2023-08-30 01:20:29,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.57142857142858) internal successors, (1173), 7 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 396.0) internal successors, (3168), 8 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,022 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 396.0) internal successors, (3168), 8 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,022 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 201 flow. Second operand 7 states and 1173 transitions. [2023-08-30 01:20:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 420 flow [2023-08-30 01:20:29,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 407 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 01:20:29,026 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 233 flow [2023-08-30 01:20:29,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2023-08-30 01:20:29,027 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 22 predicate places. [2023-08-30 01:20:29,027 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 233 flow [2023-08-30 01:20:29,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:29,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:20:29,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:29,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:29,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:29,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash 747256409, now seen corresponding path program 1 times [2023-08-30 01:20:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108564430] [2023-08-30 01:20:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:29,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:29,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 01:20:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:20:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:29,330 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:20:29,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 01:20:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:29,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:29,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108564430] [2023-08-30 01:20:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108564430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:29,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:29,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:20:29,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201406035] [2023-08-30 01:20:29,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:29,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:20:29,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 396 [2023-08-30 01:20:29,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:29,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 396 [2023-08-30 01:20:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:29,861 INFO L130 PetriNetUnfolder]: 1406/2318 cut-off events. [2023-08-30 01:20:29,862 INFO L131 PetriNetUnfolder]: For 659/659 co-relation queries the response was YES. [2023-08-30 01:20:29,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5330 conditions, 2318 events. 1406/2318 cut-off events. For 659/659 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13811 event pairs, 801 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 5301. Up to 2260 conditions per place. [2023-08-30 01:20:29,882 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 30 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-30 01:20:29,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 301 flow [2023-08-30 01:20:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-08-30 01:20:29,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41035353535353536 [2023-08-30 01:20:29,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-08-30 01:20:29,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-08-30 01:20:29,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:29,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-08-30 01:20:29,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,890 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 233 flow. Second operand 4 states and 650 transitions. [2023-08-30 01:20:29,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 301 flow [2023-08-30 01:20:29,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 38 transitions, 287 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 01:20:29,893 INFO L231 Difference]: Finished difference. Result has 61 places, 38 transitions, 227 flow [2023-08-30 01:20:29,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=61, PETRI_TRANSITIONS=38} [2023-08-30 01:20:29,893 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-08-30 01:20:29,893 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 38 transitions, 227 flow [2023-08-30 01:20:29,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:29,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:29,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:29,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:30,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:30,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1690112978, now seen corresponding path program 1 times [2023-08-30 01:20:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860267578] [2023-08-30 01:20:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:20:30,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:30,105 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 01:20:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:20:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:20:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:30,217 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:30,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:30,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:20:30,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860267578] [2023-08-30 01:20:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860267578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:30,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:30,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:20:30,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531472840] [2023-08-30 01:20:30,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:30,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:20:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:20:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:20:36,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 396 [2023-08-30 01:20:36,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 38 transitions, 227 flow. Second operand has 8 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:36,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:36,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 396 [2023-08-30 01:20:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:38,881 INFO L130 PetriNetUnfolder]: 1109/1871 cut-off events. [2023-08-30 01:20:38,881 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2023-08-30 01:20:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 1871 events. 1109/1871 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10915 event pairs, 624 based on Foata normal form. 21/1252 useless extension candidates. Maximal degree in co-relation 4276. Up to 1507 conditions per place. [2023-08-30 01:20:38,889 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 50 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2023-08-30 01:20:38,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 414 flow [2023-08-30 01:20:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:20:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:20:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1481 transitions. [2023-08-30 01:20:38,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155443322109989 [2023-08-30 01:20:38,894 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1481 transitions. [2023-08-30 01:20:38,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1481 transitions. [2023-08-30 01:20:38,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:38,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1481 transitions. [2023-08-30 01:20:38,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.55555555555554) internal successors, (1481), 9 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:38,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:38,903 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:38,903 INFO L175 Difference]: Start difference. First operand has 61 places, 38 transitions, 227 flow. Second operand 9 states and 1481 transitions. [2023-08-30 01:20:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 414 flow [2023-08-30 01:20:38,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:20:38,906 INFO L231 Difference]: Finished difference. Result has 69 places, 38 transitions, 261 flow [2023-08-30 01:20:38,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=69, PETRI_TRANSITIONS=38} [2023-08-30 01:20:38,907 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2023-08-30 01:20:38,907 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 38 transitions, 261 flow [2023-08-30 01:20:38,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.5) internal successors, (1276), 8 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:38,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:38,908 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 01:20:38,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:39,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:39,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:39,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1346410616, now seen corresponding path program 2 times [2023-08-30 01:20:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:39,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630972974] [2023-08-30 01:20:39,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:20:39,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:39,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:39,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 01:20:39,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:20:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:39,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:20:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:39,256 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:39,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 01:20:39,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:20:39,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630972974] [2023-08-30 01:20:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630972974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:20:39,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:20:39,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:20:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305794713] [2023-08-30 01:20:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:20:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:20:39,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:20:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:20:39,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:20:39,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 38 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:39,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:39,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:20:39,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:20:39,846 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 01:20:39,846 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2023-08-30 01:20:39,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 977 events. 515/977 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5382 event pairs, 270 based on Foata normal form. 138/899 useless extension candidates. Maximal degree in co-relation 2233. Up to 919 conditions per place. [2023-08-30 01:20:39,851 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 01:20:39,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-08-30 01:20:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:20:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:20:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-08-30 01:20:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2023-08-30 01:20:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-08-30 01:20:39,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-08-30 01:20:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:20:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-08-30 01:20:39,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:39,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:39,859 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:39,859 INFO L175 Difference]: Start difference. First operand has 69 places, 38 transitions, 261 flow. Second operand 4 states and 676 transitions. [2023-08-30 01:20:39,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-08-30 01:20:39,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-30 01:20:39,861 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-08-30 01:20:39,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 01:20:39,862 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2023-08-30 01:20:39,862 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-08-30 01:20:39,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:39,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:20:39,863 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:20:39,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 01:20:40,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:40,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:20:40,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:20:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1167221794, now seen corresponding path program 3 times [2023-08-30 01:20:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:20:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117138789] [2023-08-30 01:20:40,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:20:40,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:20:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:20:40,075 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:20:40,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:20:40,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:20:40,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:20:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:20:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:20:40,274 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:20:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 01:20:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:40,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:20:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:20:42,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:20:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117138789] [2023-08-30 01:20:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117138789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:20:42,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:20:42,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:20:42,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060590695] [2023-08-30 01:20:42,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:20:42,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:20:42,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:20:42,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:20:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:20:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2023-08-30 01:20:53,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:20:53,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:20:53,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2023-08-30 01:20:53,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:08,080 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 01:21:08,080 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-08-30 01:21:08,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 2273 events. 1199/2273 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13351 event pairs, 630 based on Foata normal form. 12/1861 useless extension candidates. Maximal degree in co-relation 4998. Up to 504 conditions per place. [2023-08-30 01:21:08,089 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 01:21:08,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-08-30 01:21:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:21:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:21:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4223 transitions. [2023-08-30 01:21:08,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44433922558922556 [2023-08-30 01:21:08,099 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4223 transitions. [2023-08-30 01:21:08,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4223 transitions. [2023-08-30 01:21:08,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:08,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4223 transitions. [2023-08-30 01:21:08,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.95833333333334) internal successors, (4223), 24 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,118 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,118 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 4223 transitions. [2023-08-30 01:21:08,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-08-30 01:21:08,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:21:08,124 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-08-30 01:21:08,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-08-30 01:21:08,125 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2023-08-30 01:21:08,125 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-08-30 01:21:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.0) internal successors, (3936), 24 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:08,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:08,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:08,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:08,337 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:08,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:08,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1486666684, now seen corresponding path program 1 times [2023-08-30 01:21:08,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970719272] [2023-08-30 01:21:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:08,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:08,339 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:08,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:21:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:21:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:08,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:08,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970719272] [2023-08-30 01:21:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970719272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:08,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:08,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:08,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875088591] [2023-08-30 01:21:08,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:08,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:08,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:08,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:08,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 396 [2023-08-30 01:21:08,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:08,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 396 [2023-08-30 01:21:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:08,898 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 01:21:08,898 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-08-30 01:21:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16646 event pairs, 273 based on Foata normal form. 21/2231 useless extension candidates. Maximal degree in co-relation 6151. Up to 2101 conditions per place. [2023-08-30 01:21:08,910 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 01:21:08,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-08-30 01:21:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-30 01:21:08,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-08-30 01:21:08,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-30 01:21:08,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-30 01:21:08,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:08,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-30 01:21:08,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,916 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 534 transitions. [2023-08-30 01:21:08,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-08-30 01:21:08,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 01:21:08,921 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-08-30 01:21:08,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-08-30 01:21:08,921 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2023-08-30 01:21:08,921 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-08-30 01:21:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:08,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:08,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:08,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:09,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:09,128 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:09,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1394674302, now seen corresponding path program 1 times [2023-08-30 01:21:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292172144] [2023-08-30 01:21:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:09,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:09,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 01:21:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:21:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:09,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:09,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292172144] [2023-08-30 01:21:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292172144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:21:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438497388] [2023-08-30 01:21:09,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:21:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:21:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:21:09,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-08-30 01:21:09,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:09,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:09,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-08-30 01:21:09,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:09,689 INFO L130 PetriNetUnfolder]: 1463/2827 cut-off events. [2023-08-30 01:21:09,689 INFO L131 PetriNetUnfolder]: For 1193/1193 co-relation queries the response was YES. [2023-08-30 01:21:09,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7128 conditions, 2827 events. 1463/2827 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 17918 event pairs, 300 based on Foata normal form. 160/2867 useless extension candidates. Maximal degree in co-relation 7090. Up to 1582 conditions per place. [2023-08-30 01:21:09,705 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 50 selfloop transitions, 12 changer transitions 2/65 dead transitions. [2023-08-30 01:21:09,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 65 transitions, 521 flow [2023-08-30 01:21:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:21:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:21:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 863 transitions. [2023-08-30 01:21:09,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43585858585858583 [2023-08-30 01:21:09,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 863 transitions. [2023-08-30 01:21:09,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 863 transitions. [2023-08-30 01:21:09,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:09,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 863 transitions. [2023-08-30 01:21:09,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:09,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:09,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:09,714 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 5 states and 863 transitions. [2023-08-30 01:21:09,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 65 transitions, 521 flow [2023-08-30 01:21:09,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 65 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:09,719 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 387 flow [2023-08-30 01:21:09,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2023-08-30 01:21:09,720 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-08-30 01:21:09,720 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 387 flow [2023-08-30 01:21:09,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:09,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:09,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:09,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:09,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:09,931 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:09,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash 121831332, now seen corresponding path program 2 times [2023-08-30 01:21:09,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:09,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394525646] [2023-08-30 01:21:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:21:09,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:09,933 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:09,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:21:10,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:21:10,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:21:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:10,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:10,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394525646] [2023-08-30 01:21:10,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394525646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:10,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:10,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 01:21:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349750457] [2023-08-30 01:21:10,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:10,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 01:21:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 01:21:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-30 01:21:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 396 [2023-08-30 01:21:10,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 387 flow. Second operand has 11 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:10,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:10,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 396 [2023-08-30 01:21:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:11,359 INFO L130 PetriNetUnfolder]: 2383/4627 cut-off events. [2023-08-30 01:21:11,359 INFO L131 PetriNetUnfolder]: For 4717/4717 co-relation queries the response was YES. [2023-08-30 01:21:11,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13952 conditions, 4627 events. 2383/4627 cut-off events. For 4717/4717 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 29831 event pairs, 520 based on Foata normal form. 320/4947 useless extension candidates. Maximal degree in co-relation 13912. Up to 1382 conditions per place. [2023-08-30 01:21:11,382 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 66 selfloop transitions, 29 changer transitions 4/99 dead transitions. [2023-08-30 01:21:11,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 786 flow [2023-08-30 01:21:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:21:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:21:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1677 transitions. [2023-08-30 01:21:11,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42348484848484846 [2023-08-30 01:21:11,387 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1677 transitions. [2023-08-30 01:21:11,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1677 transitions. [2023-08-30 01:21:11,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:11,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1677 transitions. [2023-08-30 01:21:11,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.7) internal successors, (1677), 10 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:11,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:11,395 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:11,395 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 387 flow. Second operand 10 states and 1677 transitions. [2023-08-30 01:21:11,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 786 flow [2023-08-30 01:21:11,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 736 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 01:21:11,404 INFO L231 Difference]: Finished difference. Result has 99 places, 69 transitions, 577 flow [2023-08-30 01:21:11,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=99, PETRI_TRANSITIONS=69} [2023-08-30 01:21:11,404 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2023-08-30 01:21:11,405 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 69 transitions, 577 flow [2023-08-30 01:21:11,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.36363636363637) internal successors, (1797), 11 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:11,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:11,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:11,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:11,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:11,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash -768683172, now seen corresponding path program 3 times [2023-08-30 01:21:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349342178] [2023-08-30 01:21:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:21:11,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:11,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:11,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 01:21:11,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:21:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:21:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:11,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:11,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:11,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349342178] [2023-08-30 01:21:11,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349342178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:11,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:11,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:21:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90794954] [2023-08-30 01:21:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:11,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:21:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:21:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:21:11,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:21:11,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 69 transitions, 577 flow. Second operand has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:11,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:11,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:21:11,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:12,923 INFO L130 PetriNetUnfolder]: 3703/7227 cut-off events. [2023-08-30 01:21:12,924 INFO L131 PetriNetUnfolder]: For 14700/14700 co-relation queries the response was YES. [2023-08-30 01:21:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28758 conditions, 7227 events. 3703/7227 cut-off events. For 14700/14700 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 50604 event pairs, 900 based on Foata normal form. 80/7307 useless extension candidates. Maximal degree in co-relation 28712. Up to 3202 conditions per place. [2023-08-30 01:21:12,963 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 87 selfloop transitions, 19 changer transitions 1/107 dead transitions. [2023-08-30 01:21:12,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 1035 flow [2023-08-30 01:21:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:21:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:21:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1027 transitions. [2023-08-30 01:21:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43223905723905726 [2023-08-30 01:21:12,967 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1027 transitions. [2023-08-30 01:21:12,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1027 transitions. [2023-08-30 01:21:12,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:12,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1027 transitions. [2023-08-30 01:21:12,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:12,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:12,971 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:12,971 INFO L175 Difference]: Start difference. First operand has 99 places, 69 transitions, 577 flow. Second operand 6 states and 1027 transitions. [2023-08-30 01:21:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 1035 flow [2023-08-30 01:21:13,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 107 transitions, 1003 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:13,081 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 685 flow [2023-08-30 01:21:13,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=685, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2023-08-30 01:21:13,082 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2023-08-30 01:21:13,082 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 685 flow [2023-08-30 01:21:13,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:13,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:13,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:13,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:13,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:13,297 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:13,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -311231742, now seen corresponding path program 4 times [2023-08-30 01:21:13,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:13,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134135686] [2023-08-30 01:21:13,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:21:13,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:13,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 01:21:13,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:21:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:21:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:13,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:21:13,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134135686] [2023-08-30 01:21:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134135686] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:21:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:21:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-30 01:21:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125110718] [2023-08-30 01:21:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:21:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:21:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 01:21:13,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-08-30 01:21:13,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 685 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:13,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:13,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-08-30 01:21:13,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:14,617 INFO L130 PetriNetUnfolder]: 3343/6527 cut-off events. [2023-08-30 01:21:14,618 INFO L131 PetriNetUnfolder]: For 22863/23183 co-relation queries the response was YES. [2023-08-30 01:21:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27902 conditions, 6527 events. 3343/6527 cut-off events. For 22863/23183 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 46093 event pairs, 940 based on Foata normal form. 160/6507 useless extension candidates. Maximal degree in co-relation 27854. Up to 4680 conditions per place. [2023-08-30 01:21:14,661 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 68 selfloop transitions, 17 changer transitions 4/91 dead transitions. [2023-08-30 01:21:14,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 91 transitions, 948 flow [2023-08-30 01:21:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:21:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:21:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-08-30 01:21:14,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44002525252525254 [2023-08-30 01:21:14,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-08-30 01:21:14,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-08-30 01:21:14,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:14,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-08-30 01:21:14,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:14,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:14,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:14,669 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 685 flow. Second operand 4 states and 697 transitions. [2023-08-30 01:21:14,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 91 transitions, 948 flow [2023-08-30 01:21:14,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 91 transitions, 922 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:14,923 INFO L231 Difference]: Finished difference. Result has 109 places, 79 transitions, 755 flow [2023-08-30 01:21:14,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=755, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2023-08-30 01:21:14,925 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2023-08-30 01:21:14,925 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 755 flow [2023-08-30 01:21:14,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:14,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:14,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:14,939 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 [2023-08-30 01:21:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:15,137 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:15,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash 836745722, now seen corresponding path program 1 times [2023-08-30 01:21:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:15,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862584751] [2023-08-30 01:21:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:15,139 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:15,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 01:21:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:21:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:21:15,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:15,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862584751] [2023-08-30 01:21:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862584751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:15,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:21:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673759174] [2023-08-30 01:21:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:21:15,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:15,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:21:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:21:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:21:15,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:15,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:15,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:21:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:16,185 INFO L130 PetriNetUnfolder]: 2963/5667 cut-off events. [2023-08-30 01:21:16,186 INFO L131 PetriNetUnfolder]: For 19774/19894 co-relation queries the response was YES. [2023-08-30 01:21:16,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 5667 events. 2963/5667 cut-off events. For 19774/19894 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 36879 event pairs, 1140 based on Foata normal form. 220/5887 useless extension candidates. Maximal degree in co-relation 24294. Up to 4282 conditions per place. [2023-08-30 01:21:16,224 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 75 selfloop transitions, 13 changer transitions 2/95 dead transitions. [2023-08-30 01:21:16,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 95 transitions, 1013 flow [2023-08-30 01:21:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:21:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:21:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-08-30 01:21:16,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297979797979798 [2023-08-30 01:21:16,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-08-30 01:21:16,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-08-30 01:21:16,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:16,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-08-30 01:21:16,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:16,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:16,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:16,231 INFO L175 Difference]: Start difference. First operand has 109 places, 79 transitions, 755 flow. Second operand 5 states and 851 transitions. [2023-08-30 01:21:16,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 95 transitions, 1013 flow [2023-08-30 01:21:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 95 transitions, 955 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 01:21:16,395 INFO L231 Difference]: Finished difference. Result has 109 places, 79 transitions, 750 flow [2023-08-30 01:21:16,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=750, PETRI_PLACES=109, PETRI_TRANSITIONS=79} [2023-08-30 01:21:16,396 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2023-08-30 01:21:16,396 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 79 transitions, 750 flow [2023-08-30 01:21:16,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:16,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:16,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:16,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:16,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:16,607 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:16,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:16,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1034117090, now seen corresponding path program 2 times [2023-08-30 01:21:16,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:16,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388791110] [2023-08-30 01:21:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:21:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:16,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:16,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 01:21:16,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:21:16,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:16,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:21:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:16,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:16,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388791110] [2023-08-30 01:21:16,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388791110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:16,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:16,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:21:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375769874] [2023-08-30 01:21:16,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:16,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:21:16,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:21:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:21:17,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2023-08-30 01:21:17,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 79 transitions, 750 flow. Second operand has 10 states, 10 states have (on average 168.5) internal successors, (1685), 10 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:17,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:17,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2023-08-30 01:21:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:18,522 INFO L130 PetriNetUnfolder]: 4723/8687 cut-off events. [2023-08-30 01:21:18,522 INFO L131 PetriNetUnfolder]: For 29123/30043 co-relation queries the response was YES. [2023-08-30 01:21:18,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38725 conditions, 8687 events. 4723/8687 cut-off events. For 29123/30043 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 61150 event pairs, 580 based on Foata normal form. 1520/10107 useless extension candidates. Maximal degree in co-relation 38676. Up to 2680 conditions per place. [2023-08-30 01:21:18,574 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 88 selfloop transitions, 41 changer transitions 3/134 dead transitions. [2023-08-30 01:21:18,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 134 transitions, 1388 flow [2023-08-30 01:21:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:21:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:21:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1721 transitions. [2023-08-30 01:21:18,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345959595959596 [2023-08-30 01:21:18,577 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1721 transitions. [2023-08-30 01:21:18,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1721 transitions. [2023-08-30 01:21:18,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:18,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1721 transitions. [2023-08-30 01:21:18,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.1) internal successors, (1721), 10 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:18,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:18,583 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 396.0) internal successors, (4356), 11 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:18,583 INFO L175 Difference]: Start difference. First operand has 109 places, 79 transitions, 750 flow. Second operand 10 states and 1721 transitions. [2023-08-30 01:21:18,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 134 transitions, 1388 flow [2023-08-30 01:21:18,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 134 transitions, 1314 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 01:21:18,860 INFO L231 Difference]: Finished difference. Result has 119 places, 88 transitions, 891 flow [2023-08-30 01:21:18,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=891, PETRI_PLACES=119, PETRI_TRANSITIONS=88} [2023-08-30 01:21:18,861 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 79 predicate places. [2023-08-30 01:21:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 88 transitions, 891 flow [2023-08-30 01:21:18,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 168.5) internal successors, (1685), 10 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:18,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:18,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:18,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:19,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:19,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1708162462, now seen corresponding path program 3 times [2023-08-30 01:21:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:19,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038593697] [2023-08-30 01:21:19,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:21:19,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:19,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:19,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:19,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 01:21:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:21:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:21:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:21:19,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:19,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:19,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038593697] [2023-08-30 01:21:19,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038593697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:19,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:19,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 01:21:19,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517174721] [2023-08-30 01:21:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:21:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:21:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:21:19,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2023-08-30 01:21:19,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 88 transitions, 891 flow. Second operand has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:19,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:19,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2023-08-30 01:21:19,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:20,956 INFO L130 PetriNetUnfolder]: 5623/10127 cut-off events. [2023-08-30 01:21:20,957 INFO L131 PetriNetUnfolder]: For 39448/39628 co-relation queries the response was YES. [2023-08-30 01:21:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49709 conditions, 10127 events. 5623/10127 cut-off events. For 39448/39628 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 68898 event pairs, 860 based on Foata normal form. 400/10527 useless extension candidates. Maximal degree in co-relation 49656. Up to 8780 conditions per place. [2023-08-30 01:21:21,055 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 84 selfloop transitions, 15 changer transitions 1/105 dead transitions. [2023-08-30 01:21:21,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 105 transitions, 1205 flow [2023-08-30 01:21:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:21:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:21:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-08-30 01:21:21,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297979797979798 [2023-08-30 01:21:21,058 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-08-30 01:21:21,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-08-30 01:21:21,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:21,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-08-30 01:21:21,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,162 INFO L175 Difference]: Start difference. First operand has 119 places, 88 transitions, 891 flow. Second operand 5 states and 851 transitions. [2023-08-30 01:21:21,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 105 transitions, 1205 flow [2023-08-30 01:21:21,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 105 transitions, 1102 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 01:21:21,543 INFO L231 Difference]: Finished difference. Result has 121 places, 90 transitions, 869 flow [2023-08-30 01:21:21,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=121, PETRI_TRANSITIONS=90} [2023-08-30 01:21:21,546 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2023-08-30 01:21:21,546 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 90 transitions, 869 flow [2023-08-30 01:21:21,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:21,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:21,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:21,560 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 (23)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:21,757 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:21,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash 569297098, now seen corresponding path program 4 times [2023-08-30 01:21:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:21,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530808380] [2023-08-30 01:21:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:21:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:21,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 01:21:21,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:21:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:21:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:21:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:22,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:21:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:21:22,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:22,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530808380] [2023-08-30 01:21:22,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530808380] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:21:22,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:21:22,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-08-30 01:21:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582326093] [2023-08-30 01:21:22,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:21:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 01:21:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 01:21:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-08-30 01:21:22,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 396 [2023-08-30 01:21:22,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 90 transitions, 869 flow. Second operand has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:22,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:22,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 396 [2023-08-30 01:21:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:25,753 INFO L130 PetriNetUnfolder]: 7923/14527 cut-off events. [2023-08-30 01:21:25,754 INFO L131 PetriNetUnfolder]: For 57495/57495 co-relation queries the response was YES. [2023-08-30 01:21:25,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65513 conditions, 14527 events. 7923/14527 cut-off events. For 57495/57495 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 106404 event pairs, 1900 based on Foata normal form. 520/15047 useless extension candidates. Maximal degree in co-relation 65458. Up to 8042 conditions per place. [2023-08-30 01:21:25,887 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 129 selfloop transitions, 64 changer transitions 1/194 dead transitions. [2023-08-30 01:21:25,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 194 transitions, 1902 flow [2023-08-30 01:21:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 01:21:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 01:21:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3329 transitions. [2023-08-30 01:21:25,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42032828282828283 [2023-08-30 01:21:25,891 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3329 transitions. [2023-08-30 01:21:25,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3329 transitions. [2023-08-30 01:21:25,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:25,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3329 transitions. [2023-08-30 01:21:25,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 166.45) internal successors, (3329), 20 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 396.0) internal successors, (8316), 21 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,899 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 396.0) internal successors, (8316), 21 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:25,899 INFO L175 Difference]: Start difference. First operand has 121 places, 90 transitions, 869 flow. Second operand 20 states and 3329 transitions. [2023-08-30 01:21:25,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 194 transitions, 1902 flow [2023-08-30 01:21:26,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1862 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 01:21:26,611 INFO L231 Difference]: Finished difference. Result has 149 places, 141 transitions, 1529 flow [2023-08-30 01:21:26,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1529, PETRI_PLACES=149, PETRI_TRANSITIONS=141} [2023-08-30 01:21:26,611 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2023-08-30 01:21:26,612 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 141 transitions, 1529 flow [2023-08-30 01:21:26,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:26,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:26,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:21:26,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 01:21:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:26,813 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-30 01:21:26,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash -854847242, now seen corresponding path program 1 times [2023-08-30 01:21:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:26,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106438708] [2023-08-30 01:21:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:26,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:21:26,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:26,815 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:21:26,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 01:21:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 01:21:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:28,211 INFO L321 Elim1Store]: treesize reduction 420, result has 20.6 percent of original size [2023-08-30 01:21:28,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1313 treesize of output 237 [2023-08-30 01:25:39,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-08-30 01:25:39,526 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-08-30 01:25:39,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:25:39,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106438708] [2023-08-30 01:25:39,528 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-08-30 01:25:39,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 01:25:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:25:39,739 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:311) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 51 more [2023-08-30 01:25:39,743 INFO L158 Benchmark]: Toolchain (without parser) took 347084.52ms. Allocated memory was 79.7MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 54.5MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2023-08-30 01:25:39,743 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.4MB in the beginning and 38.4MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:25:39,743 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.03ms. Allocated memory is still 79.7MB. Free memory was 54.3MB in the beginning and 41.0MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 01:25:39,744 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.87ms. Allocated memory is still 79.7MB. Free memory was 40.8MB in the beginning and 39.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 01:25:39,744 INFO L158 Benchmark]: Boogie Preprocessor took 71.03ms. Allocated memory is still 79.7MB. Free memory was 39.0MB in the beginning and 58.5MB in the end (delta: -19.5MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2023-08-30 01:25:39,744 INFO L158 Benchmark]: RCFGBuilder took 675.38ms. Allocated memory is still 79.7MB. Free memory was 58.5MB in the beginning and 35.5MB in the end (delta: 23.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-08-30 01:25:39,744 INFO L158 Benchmark]: TraceAbstraction took 346018.74ms. Allocated memory was 79.7MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 34.8MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2023-08-30 01:25:39,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 60.8MB. Free memory was 38.4MB in the beginning and 38.4MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.03ms. Allocated memory is still 79.7MB. Free memory was 54.3MB in the beginning and 41.0MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.87ms. Allocated memory is still 79.7MB. Free memory was 40.8MB in the beginning and 39.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.03ms. Allocated memory is still 79.7MB. Free memory was 39.0MB in the beginning and 58.5MB in the end (delta: -19.5MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * RCFGBuilder took 675.38ms. Allocated memory is still 79.7MB. Free memory was 58.5MB in the beginning and 35.5MB in the end (delta: 23.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 346018.74ms. Allocated memory was 79.7MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 34.8MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 17.2s, 176 PlacesBefore, 40 PlacesAfterwards, 184 TransitionsBefore, 36 TransitionsAfterwards, 3708 CoEnabledTransitionPairs, 7 FixpointIterations, 86 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 9 ConcurrentYvCompositions, 12 ChoiceCompositions, 206 TotalNumberOfCompositions, 3611 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3524, independent: 3514, independent conditional: 0, independent unconditional: 3514, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1931, independent: 1927, independent conditional: 0, independent unconditional: 1927, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3524, independent: 1587, independent conditional: 0, independent unconditional: 1587, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 1931, unknown conditional: 0, unknown unconditional: 1931] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")