./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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/popl20-queue-add-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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:54:52,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:54:52,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:54:52,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:54:52,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:54:52,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:54:52,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:54:52,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:54:52,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:54:52,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:54:52,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:54:52,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:54:52,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:54:52,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:54:52,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:54:52,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:54:52,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:54:52,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:54:52,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:54:52,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:54:52,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:54:52,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:54:52,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:54:52,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:54:52,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:54:52,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:54:52,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:54:52,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:54:52,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:54:52,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:54:52,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:54:52,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:54:52,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:54:52,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:54:52,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:54:52,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:54:52,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:54:52,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:54:52,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:54:52,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:54:52,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:54:52,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:54:52,894 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:54:52,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:54:52,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:54:52,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:54:52,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:54:52,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:54:52,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:54:52,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:54:52,898 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:54:52,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:54:52,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:54:52,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:54:52,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:54:52,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:54:52,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:54:52,900 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:54:52,900 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:54:52,900 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:54:52,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:54:52,900 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:54:52,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:54:52,901 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:54:52,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:54:52,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:54:52,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:54:52,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:54:52,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:54:52,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:54:52,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:54:52,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:54:52,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:54:52,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:54:52,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:54:52,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:54:52,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:54:53,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:54:53,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:54:53,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:54:53,241 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:54:53,242 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:54:53,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 00:54:54,464 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:54:54,667 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:54:54,668 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 00:54:54,673 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ee5166/0df4d97cca79484d867c5b82651cf31a/FLAG4f43b3867 [2023-08-30 00:54:54,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ee5166/0df4d97cca79484d867c5b82651cf31a [2023-08-30 00:54:54,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:54:54,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:54:54,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:54:54,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:54:54,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:54:54,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:54:54" (1/1) ... [2023-08-30 00:54:54,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44175134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:54, skipping insertion in model container [2023-08-30 00:54:54,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:54:54" (1/1) ... [2023-08-30 00:54:54,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:54:54,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:54:54,937 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 00:54:54,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:54:54,966 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 00:54:54,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10612354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:54, skipping insertion in model container [2023-08-30 00:54:54,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:54:54,969 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:54:54,970 INFO L158 Benchmark]: Toolchain (without parser) took 270.44ms. Allocated memory is still 81.8MB. Free memory was 62.9MB in the beginning and 52.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:54:54,971 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 62.9MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:54:54,972 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.83ms. Allocated memory is still 81.8MB. Free memory was 62.7MB in the beginning and 52.9MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 00:54:54,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 62.9MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.83ms. Allocated memory is still 81.8MB. Free memory was 62.7MB in the beginning and 52.9MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:54:56,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:54:56,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:54:56,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:54:56,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:54:56,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:54:56,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:54:56,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:54:56,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:54:56,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:54:56,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:54:56,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:54:56,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:54:56,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:54:56,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:54:56,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:54:56,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:54:56,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:54:56,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:54:56,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:54:56,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:54:56,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:54:56,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:54:56,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:54:56,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:54:56,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:54:56,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:54:56,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:54:56,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:54:56,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:54:56,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:54:56,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:54:56,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:54:56,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:54:56,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:54:56,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:54:56,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:54:56,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:54:56,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:54:56,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:54:56,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:54:56,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:54:56,860 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:54:56,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:54:56,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:54:56,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:54:56,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:54:56,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:54:56,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:54:56,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:54:56,864 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:54:56,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:54:56,865 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:54:56,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:54:56,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:54:56,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:54:56,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:54:56,866 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:54:56,866 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:54:56,866 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:54:56,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:54:56,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:54:56,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:54:56,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:54:56,867 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:54:56,868 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:54:56,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:54:56,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:54:56,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:54:56,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:54:56,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:54:56,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:54:56,869 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:54:56,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:54:56,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:54:56,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:54:56,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:54:56,870 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:54:56,870 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:54:56,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:54:57,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:54:57,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:54:57,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:54:57,186 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:54:57,187 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:54:57,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 00:54:58,374 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:54:58,608 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:54:58,608 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-30 00:54:58,613 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866bb9994/c9bc71d1655d4378b364afb60853c94b/FLAGce16fa85e [2023-08-30 00:54:58,625 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866bb9994/c9bc71d1655d4378b364afb60853c94b [2023-08-30 00:54:58,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:54:58,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:54:58,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:54:58,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:54:58,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:54:58,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:58,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9715d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58, skipping insertion in model container [2023-08-30 00:54:58,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:58,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:54:58,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:54:58,844 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 00:54:58,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:54:58,879 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:54:58,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:54:58,917 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 00:54:58,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:54:58,930 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:54:58,963 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-08-30 00:54:58,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:54:58,981 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:54:58,983 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:54:58,989 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:54:58,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58 WrapperNode [2023-08-30 00:54:58,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:54:58,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:54:58,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:54:58,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:54:58,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,080 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2023-08-30 00:54:59,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:54:59,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:54:59,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:54:59,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:54:59,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:54:59,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:54:59,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:54:59,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:54:59,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (1/1) ... [2023-08-30 00:54:59,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:54:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:54:59,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:54:59,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:54:59,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:54:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:54:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:54:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:54:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:54:59,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:54:59,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:54:59,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:54:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:54:59,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:54:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:54:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:54:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:54:59,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:54:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:54:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:54:59,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:54:59,209 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:54:59,327 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:54:59,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:54:59,897 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:55:00,054 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:55:00,054 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 00:55:00,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:55:00 BoogieIcfgContainer [2023-08-30 00:55:00,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:55:00,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:55:00,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:55:00,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:55:00,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:54:58" (1/3) ... [2023-08-30 00:55:00,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a41e2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:55:00, skipping insertion in model container [2023-08-30 00:55:00,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:54:58" (2/3) ... [2023-08-30 00:55:00,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a41e2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:55:00, skipping insertion in model container [2023-08-30 00:55:00,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:55:00" (3/3) ... [2023-08-30 00:55:00,066 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-08-30 00:55:00,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:55:00,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:55:00,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:55:00,169 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:55:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 00:55:00,307 INFO L130 PetriNetUnfolder]: 18/221 cut-off events. [2023-08-30 00:55:00,307 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:55:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 18/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 00:55:00,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 224 transitions, 472 flow [2023-08-30 00:55:00,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 452 flow [2023-08-30 00:55:00,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:55:00,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 00:55:00,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 452 flow [2023-08-30 00:55:00,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 452 flow [2023-08-30 00:55:00,406 INFO L130 PetriNetUnfolder]: 18/217 cut-off events. [2023-08-30 00:55:00,406 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:55:00,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 217 events. 18/217 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 174. Up to 3 conditions per place. [2023-08-30 00:55:00,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-08-30 00:55:22,815 INFO L134 LiptonReduction]: Checked pairs total: 4207 [2023-08-30 00:55:22,815 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-30 00:55:22,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:55:22,833 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;@3876000a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:55:22,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 00:55:22,836 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:55:22,836 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:55:22,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:22,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:55:22,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:22,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash 32725, now seen corresponding path program 1 times [2023-08-30 00:55:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067708903] [2023-08-30 00:55:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:22,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:22,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:22,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:22,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 00:55:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:22,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:55:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:23,153 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:55:23,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:55:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:23,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:23,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067708903] [2023-08-30 00:55:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067708903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:23,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:23,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:55:23,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091072638] [2023-08-30 00:55:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:23,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:55:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:55:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:55:23,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 00:55:23,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:23,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:23,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 00:55:23,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:24,635 INFO L130 PetriNetUnfolder]: 5982/7543 cut-off events. [2023-08-30 00:55:24,636 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 00:55:24,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 7543 events. 5982/7543 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 33477 event pairs, 3015 based on Foata normal form. 0/1885 useless extension candidates. Maximal degree in co-relation 13723. Up to 7494 conditions per place. [2023-08-30 00:55:24,683 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 00:55:24,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 216 flow [2023-08-30 00:55:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-30 00:55:24,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274252370532458 [2023-08-30 00:55:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-30 00:55:24,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-30 00:55:24,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:24,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-30 00:55:24,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:24,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:24,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:24,725 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 586 transitions. [2023-08-30 00:55:24,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 216 flow [2023-08-30 00:55:24,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:55:24,734 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 110 flow [2023-08-30 00:55:24,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 00:55:24,741 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 00:55:24,742 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 110 flow [2023-08-30 00:55:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:24,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:24,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:55:24,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:24,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:24,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 32726, now seen corresponding path program 1 times [2023-08-30 00:55:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:24,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348223722] [2023-08-30 00:55:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:24,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:24,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:24,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:24,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 00:55:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:55:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:25,134 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:55:25,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:55:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:25,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:25,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348223722] [2023-08-30 00:55:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348223722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:25,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:25,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:55:25,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604756480] [2023-08-30 00:55:25,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:25,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:55:25,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:55:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:55:25,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 00:55:25,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:25,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:25,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 00:55:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:27,371 INFO L130 PetriNetUnfolder]: 11950/15070 cut-off events. [2023-08-30 00:55:27,371 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 00:55:27,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30173 conditions, 15070 events. 11950/15070 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 72986 event pairs, 6027 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 30167. Up to 7491 conditions per place. [2023-08-30 00:55:27,462 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 00:55:27,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 392 flow [2023-08-30 00:55:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-30 00:55:27,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587892049598833 [2023-08-30 00:55:27,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-30 00:55:27,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-30 00:55:27,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:27,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-30 00:55:27,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:27,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:27,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:27,472 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 110 flow. Second operand 3 states and 629 transitions. [2023-08-30 00:55:27,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 392 flow [2023-08-30 00:55:27,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:55:27,475 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 141 flow [2023-08-30 00:55:27,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 00:55:27,476 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-30 00:55:27,476 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 141 flow [2023-08-30 00:55:27,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:27,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:27,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:55:27,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:27,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1018781, now seen corresponding path program 1 times [2023-08-30 00:55:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144285835] [2023-08-30 00:55:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:27,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:27,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:55:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:55:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:27,908 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 00:55:27,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:55:27,938 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:55:27,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:55:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:28,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:55:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:28,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:28,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144285835] [2023-08-30 00:55:28,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144285835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:28,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:28,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:55:28,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384309571] [2023-08-30 00:55:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:28,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:55:28,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:55:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:55:28,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 00:55:28,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:28,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:28,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 00:55:28,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:29,782 INFO L130 PetriNetUnfolder]: 9351/11909 cut-off events. [2023-08-30 00:55:29,782 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 00:55:29,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23866 conditions, 11909 events. 9351/11909 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 57655 event pairs, 4696 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 23857. Up to 11811 conditions per place. [2023-08-30 00:55:29,832 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 48 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-30 00:55:29,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 235 flow [2023-08-30 00:55:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-30 00:55:29,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43326039387308535 [2023-08-30 00:55:29,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-30 00:55:29,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-30 00:55:29,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:29,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-30 00:55:29,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:29,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:29,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:29,841 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 141 flow. Second operand 3 states and 594 transitions. [2023-08-30 00:55:29,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 235 flow [2023-08-30 00:55:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:55:29,843 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 131 flow [2023-08-30 00:55:29,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-30 00:55:29,844 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-08-30 00:55:29,844 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 131 flow [2023-08-30 00:55:29,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:29,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:29,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:55:29,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:30,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:30,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1017782, now seen corresponding path program 1 times [2023-08-30 00:55:30,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:30,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824176174] [2023-08-30 00:55:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:30,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:30,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 00:55:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:55:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:30,252 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:55:30,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:55:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:30,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:55:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:30,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824176174] [2023-08-30 00:55:30,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824176174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:55:30,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:55:30,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:55:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414764599] [2023-08-30 00:55:30,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:55:30,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:55:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:55:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:55:31,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 457 [2023-08-30 00:55:31,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:31,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:31,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 457 [2023-08-30 00:55:31,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:33,619 INFO L130 PetriNetUnfolder]: 14006/17846 cut-off events. [2023-08-30 00:55:33,619 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 00:55:33,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35759 conditions, 17846 events. 14006/17846 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 90803 event pairs, 7038 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 35750. Up to 5907 conditions per place. [2023-08-30 00:55:33,719 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 125 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2023-08-30 00:55:33,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 145 transitions, 631 flow [2023-08-30 00:55:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:55:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:55:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-30 00:55:33,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 00:55:33,723 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-30 00:55:33,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-30 00:55:33,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:33,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-30 00:55:33,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,733 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 131 flow. Second operand 6 states and 1156 transitions. [2023-08-30 00:55:33,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 145 transitions, 631 flow [2023-08-30 00:55:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:55:33,736 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 259 flow [2023-08-30 00:55:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-08-30 00:55:33,737 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 00:55:33,737 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 259 flow [2023-08-30 00:55:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:33,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:33,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:55:33,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:33,956 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:33,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1018782, now seen corresponding path program 1 times [2023-08-30 00:55:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693744239] [2023-08-30 00:55:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:33,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:33,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 00:55:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:55:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:34,138 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 00:55:34,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 00:55:34,501 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 00:55:34,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:55:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:34,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:34,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693744239] [2023-08-30 00:55:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693744239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:55:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342312606] [2023-08-30 00:55:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:55:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:55:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:55:34,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-08-30 00:55:34,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:34,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:34,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-08-30 00:55:34,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:36,051 INFO L130 PetriNetUnfolder]: 10112/13109 cut-off events. [2023-08-30 00:55:36,052 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 00:55:36,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26332 conditions, 13109 events. 10112/13109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 67461 event pairs, 5043 based on Foata normal form. 0/3886 useless extension candidates. Maximal degree in co-relation 26318. Up to 12962 conditions per place. [2023-08-30 00:55:36,115 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 00:55:36,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 355 flow [2023-08-30 00:55:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-30 00:55:36,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961342086068566 [2023-08-30 00:55:36,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-30 00:55:36,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-30 00:55:36,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:36,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-30 00:55:36,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:36,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:36,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:36,124 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 259 flow. Second operand 3 states and 589 transitions. [2023-08-30 00:55:36,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 355 flow [2023-08-30 00:55:36,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:55:36,127 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 222 flow [2023-08-30 00:55:36,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-30 00:55:36,128 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 00:55:36,128 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 222 flow [2023-08-30 00:55:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:36,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:55:36,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:55:36,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:36,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:36,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash 979074907, now seen corresponding path program 1 times [2023-08-30 00:55:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546135925] [2023-08-30 00:55:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:36,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:36,342 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 (7)] Waiting until timeout for monitored process [2023-08-30 00:55:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:55:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:36,494 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 00:55:36,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 00:55:36,731 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 00:55:36,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 00:55:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:36,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:36,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:36,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546135925] [2023-08-30 00:55:36,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546135925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:36,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:36,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:55:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630959153] [2023-08-30 00:55:36,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:36,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:55:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:55:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:55:37,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 457 [2023-08-30 00:55:37,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:37,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:37,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 457 [2023-08-30 00:55:37,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:38,048 INFO L130 PetriNetUnfolder]: 9707/12563 cut-off events. [2023-08-30 00:55:38,048 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 00:55:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25231 conditions, 12563 events. 9707/12563 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 64156 event pairs, 4827 based on Foata normal form. 0/3790 useless extension candidates. Maximal degree in co-relation 25216. Up to 12416 conditions per place. [2023-08-30 00:55:38,103 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 00:55:38,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 330 flow [2023-08-30 00:55:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-30 00:55:38,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42815463165572576 [2023-08-30 00:55:38,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-30 00:55:38,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-30 00:55:38,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:38,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-30 00:55:38,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:38,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:38,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:38,110 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 222 flow. Second operand 3 states and 587 transitions. [2023-08-30 00:55:38,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 330 flow [2023-08-30 00:55:38,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:55:38,112 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 219 flow [2023-08-30 00:55:38,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-30 00:55:38,113 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-30 00:55:38,113 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 219 flow [2023-08-30 00:55:38,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:38,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:55:38,121 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 00:55:38,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:38,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:38,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 979074905, now seen corresponding path program 1 times [2023-08-30 00:55:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:38,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105243867] [2023-08-30 00:55:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:55:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:38,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:38,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 00:55:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:55:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:55:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:38,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:38,472 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-30 00:55:38,473 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 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-30 00:55:38,486 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 39 treesize of output 37 [2023-08-30 00:55:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:55:38,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:55:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:38,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:55:38,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105243867] [2023-08-30 00:55:38,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105243867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:55:38,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:55:38,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:55:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752621185] [2023-08-30 00:55:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:55:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:55:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:55:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:55:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 00:55:38,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:38,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:38,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 00:55:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:39,691 INFO L130 PetriNetUnfolder]: 9302/12017 cut-off events. [2023-08-30 00:55:39,691 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 00:55:39,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24140 conditions, 12017 events. 9302/12017 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 60998 event pairs, 4611 based on Foata normal form. 0/3694 useless extension candidates. Maximal degree in co-relation 24124. Up to 11870 conditions per place. [2023-08-30 00:55:39,743 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 00:55:39,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 323 flow [2023-08-30 00:55:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:55:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:55:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-30 00:55:39,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-08-30 00:55:39,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-30 00:55:39,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-30 00:55:39,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:39,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-30 00:55:39,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:39,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:39,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:39,750 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 219 flow. Second operand 3 states and 588 transitions. [2023-08-30 00:55:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 323 flow [2023-08-30 00:55:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:55:39,752 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 216 flow [2023-08-30 00:55:39,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 00:55:39,752 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-30 00:55:39,753 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 216 flow [2023-08-30 00:55:39,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:39,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:55:39,753 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:55:39,765 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 00:55:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:39,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:55:39,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:55:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash 259225558, now seen corresponding path program 2 times [2023-08-30 00:55:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:55:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897861423] [2023-08-30 00:55:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:55:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:55:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:55:39,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:55:39,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 00:55:40,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:55:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:55:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:55:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:55:40,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:55:40,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:55:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:40,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:55:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:55:40,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:55:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897861423] [2023-08-30 00:55:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897861423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:55:40,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:55:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:55:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016047595] [2023-08-30 00:55:40,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:55:40,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:55:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:55:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:55:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:55:43,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 00:55:43,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:43,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:55:43,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 00:55:43,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:46,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:55:48,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:55:50,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:55:52,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:55:53,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:56:01,551 INFO L130 PetriNetUnfolder]: 30876/39910 cut-off events. [2023-08-30 00:56:01,551 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-30 00:56:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80071 conditions, 39910 events. 30876/39910 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 221455 event pairs, 15343 based on Foata normal form. 12/12409 useless extension candidates. Maximal degree in co-relation 80054. Up to 3962 conditions per place. [2023-08-30 00:56:01,756 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-08-30 00:56:01,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 380 transitions, 1774 flow [2023-08-30 00:56:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:56:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:56:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2429 transitions. [2023-08-30 00:56:01,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429248723559446 [2023-08-30 00:56:01,764 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2429 transitions. [2023-08-30 00:56:01,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2429 transitions. [2023-08-30 00:56:01,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:01,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2429 transitions. [2023-08-30 00:56:01,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.41666666666666) internal successors, (2429), 12 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:01,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:01,780 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:01,780 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 216 flow. Second operand 12 states and 2429 transitions. [2023-08-30 00:56:01,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 380 transitions, 1774 flow [2023-08-30 00:56:01,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:56:01,787 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 459 flow [2023-08-30 00:56:01,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 00:56:01,787 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-08-30 00:56:01,788 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 459 flow [2023-08-30 00:56:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:01,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:01,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:56:01,803 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 (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:02,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:02,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:56:02,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 286544683, now seen corresponding path program 1 times [2023-08-30 00:56:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352361983] [2023-08-30 00:56:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:02,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:02,006 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:02,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 00:56:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:56:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:02,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:56:02,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:02,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352361983] [2023-08-30 00:56:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352361983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:56:02,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:56:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:56:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571254824] [2023-08-30 00:56:02,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:56:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:56:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:56:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:56:02,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 00:56:02,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:02,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:02,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 00:56:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:05,873 INFO L130 PetriNetUnfolder]: 30944/40180 cut-off events. [2023-08-30 00:56:05,873 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 00:56:05,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80768 conditions, 40180 events. 30944/40180 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 225046 event pairs, 15370 based on Foata normal form. 270/12859 useless extension candidates. Maximal degree in co-relation 80743. Up to 39396 conditions per place. [2023-08-30 00:56:06,085 INFO L137 encePairwiseOnDemand]: 443/457 looper letters, 97 selfloop transitions, 3 changer transitions 1/104 dead transitions. [2023-08-30 00:56:06,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 841 flow [2023-08-30 00:56:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:56:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:56:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 784 transitions. [2023-08-30 00:56:06,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288840262582057 [2023-08-30 00:56:06,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 784 transitions. [2023-08-30 00:56:06,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 784 transitions. [2023-08-30 00:56:06,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:06,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 784 transitions. [2023-08-30 00:56:06,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:06,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:06,093 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:06,093 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 459 flow. Second operand 4 states and 784 transitions. [2023-08-30 00:56:06,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 841 flow [2023-08-30 00:56:06,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 758 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-30 00:56:06,098 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 429 flow [2023-08-30 00:56:06,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 00:56:06,099 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2023-08-30 00:56:06,099 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 429 flow [2023-08-30 00:56:06,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:06,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:06,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:06,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:06,309 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:56:06,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 293171228, now seen corresponding path program 1 times [2023-08-30 00:56:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248732971] [2023-08-30 00:56:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:06,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:06,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 00:56:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:56:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:06,447 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:56:06,447 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 33 treesize of output 44 [2023-08-30 00:56:06,473 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:56:06,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:56:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:06,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:56:06,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248732971] [2023-08-30 00:56:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248732971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:56:06,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:56:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:56:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886592677] [2023-08-30 00:56:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:56:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:56:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:56:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:56:06,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 00:56:06,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:06,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:06,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 00:56:06,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:10,291 INFO L130 PetriNetUnfolder]: 29254/37870 cut-off events. [2023-08-30 00:56:10,291 INFO L131 PetriNetUnfolder]: For 3109/3109 co-relation queries the response was YES. [2023-08-30 00:56:10,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97436 conditions, 37870 events. 29254/37870 cut-off events. For 3109/3109 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 209972 event pairs, 14450 based on Foata normal form. 0/12210 useless extension candidates. Maximal degree in co-relation 97409. Up to 37350 conditions per place. [2023-08-30 00:56:10,550 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 70 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 00:56:10,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 567 flow [2023-08-30 00:56:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:56:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:56:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-08-30 00:56:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208606856309263 [2023-08-30 00:56:10,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-08-30 00:56:10,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-08-30 00:56:10,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:10,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-08-30 00:56:10,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:10,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:10,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:10,556 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 429 flow. Second operand 3 states and 577 transitions. [2023-08-30 00:56:10,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 567 flow [2023-08-30 00:56:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 561 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 00:56:10,559 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 421 flow [2023-08-30 00:56:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-30 00:56:10,560 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-08-30 00:56:10,560 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 421 flow [2023-08-30 00:56:10,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:10,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:10,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:10,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:10,771 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:56:10,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash 293171230, now seen corresponding path program 1 times [2023-08-30 00:56:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905354285] [2023-08-30 00:56:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:10,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:10,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 00:56:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:56:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:10,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:56:10,958 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 00:56:10,959 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 15 treesize of output 38 [2023-08-30 00:56:10,976 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 298 treesize of output 290 [2023-08-30 00:56:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:56:11,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 00:56:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:11,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:56:11,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:11,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905354285] [2023-08-30 00:56:11,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905354285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:56:11,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:56:11,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:56:11,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872052433] [2023-08-30 00:56:11,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:56:11,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:56:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:11,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:56:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:56:11,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 457 [2023-08-30 00:56:11,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 421 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:11,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:11,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 457 [2023-08-30 00:56:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:15,094 INFO L130 PetriNetUnfolder]: 27434/35430 cut-off events. [2023-08-30 00:56:15,094 INFO L131 PetriNetUnfolder]: For 3091/3091 co-relation queries the response was YES. [2023-08-30 00:56:15,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90894 conditions, 35430 events. 27434/35430 cut-off events. For 3091/3091 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 194183 event pairs, 13500 based on Foata normal form. 0/11820 useless extension candidates. Maximal degree in co-relation 90866. Up to 34910 conditions per place. [2023-08-30 00:56:15,308 INFO L137 encePairwiseOnDemand]: 454/457 looper letters, 68 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-08-30 00:56:15,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 555 flow [2023-08-30 00:56:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:56:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:56:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 00:56:15,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 00:56:15,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 00:56:15,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 00:56:15,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:15,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 00:56:15,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:15,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:15,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:15,314 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 421 flow. Second operand 3 states and 578 transitions. [2023-08-30 00:56:15,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 555 flow [2023-08-30 00:56:15,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:56:15,318 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 418 flow [2023-08-30 00:56:15,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-30 00:56:15,319 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-30 00:56:15,319 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 418 flow [2023-08-30 00:56:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:15,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:15,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:15,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:15,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:56:15,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -526619824, now seen corresponding path program 1 times [2023-08-30 00:56:15,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:15,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365126489] [2023-08-30 00:56:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:15,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:15,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 00:56:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:56:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:15,689 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:56:15,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:56:15,711 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 00:56:15,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 00:56:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:56:15,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:56:15,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:15,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365126489] [2023-08-30 00:56:15,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365126489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:56:15,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:56:15,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:56:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336943852] [2023-08-30 00:56:15,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:56:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:56:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:15,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:56:15,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:56:15,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 00:56:15,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:15,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:15,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 00:56:15,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:18,257 INFO L130 PetriNetUnfolder]: 17174/22510 cut-off events. [2023-08-30 00:56:18,257 INFO L131 PetriNetUnfolder]: For 2621/2621 co-relation queries the response was YES. [2023-08-30 00:56:18,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56985 conditions, 22510 events. 17174/22510 cut-off events. For 2621/2621 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 121006 event pairs, 8530 based on Foata normal form. 0/8620 useless extension candidates. Maximal degree in co-relation 56956. Up to 22167 conditions per place. [2023-08-30 00:56:18,379 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 54 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-08-30 00:56:18,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 538 flow [2023-08-30 00:56:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:56:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:56:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-30 00:56:18,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048140043763676 [2023-08-30 00:56:18,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-30 00:56:18,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-30 00:56:18,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:56:18,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-30 00:56:18,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:18,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:18,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:18,387 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 418 flow. Second operand 4 states and 740 transitions. [2023-08-30 00:56:18,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 538 flow [2023-08-30 00:56:18,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:56:18,391 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 429 flow [2023-08-30 00:56:18,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-30 00:56:18,392 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-08-30 00:56:18,392 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 429 flow [2023-08-30 00:56:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:18,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:18,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:18,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:18,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:56:18,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash -526619823, now seen corresponding path program 1 times [2023-08-30 00:56:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:56:18,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606151391] [2023-08-30 00:56:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:56:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:56:18,605 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:56:18,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 00:56:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 00:56:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:18,831 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:56:18,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:56:18,943 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:56:18,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:56:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:56:19,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:56:19,061 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:56:19,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:56:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:19,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:56:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:26,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:56:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606151391] [2023-08-30 00:56:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606151391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:56:26,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:56:26,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:56:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178401567] [2023-08-30 00:56:26,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:56:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:56:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:56:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:56:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:56:30,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:56:33,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:56:36,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:56:36,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 457 [2023-08-30 00:56:36,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:36,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:36,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 457 [2023-08-30 00:56:36,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:56:49,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 00:56:59,500 WARN L222 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:57:06,289 INFO L130 PetriNetUnfolder]: 34766/46026 cut-off events. [2023-08-30 00:57:06,289 INFO L131 PetriNetUnfolder]: For 6942/6942 co-relation queries the response was YES. [2023-08-30 00:57:06,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114881 conditions, 46026 events. 34766/46026 cut-off events. For 6942/6942 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 274513 event pairs, 17490 based on Foata normal form. 0/19856 useless extension candidates. Maximal degree in co-relation 114851. Up to 22251 conditions per place. [2023-08-30 00:57:06,602 INFO L137 encePairwiseOnDemand]: 447/457 looper letters, 151 selfloop transitions, 31 changer transitions 1/186 dead transitions. [2023-08-30 00:57:06,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 186 transitions, 1298 flow [2023-08-30 00:57:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:57:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:57:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2528 transitions. [2023-08-30 00:57:06,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687819110138585 [2023-08-30 00:57:06,609 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2528 transitions. [2023-08-30 00:57:06,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2528 transitions. [2023-08-30 00:57:06,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:06,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2528 transitions. [2023-08-30 00:57:06,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.53333333333333) internal successors, (2528), 15 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,623 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,623 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 429 flow. Second operand 15 states and 2528 transitions. [2023-08-30 00:57:06,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 186 transitions, 1298 flow [2023-08-30 00:57:06,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 186 transitions, 1285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:06,630 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 676 flow [2023-08-30 00:57:06,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=676, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-30 00:57:06,631 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 31 predicate places. [2023-08-30 00:57:06,631 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 676 flow [2023-08-30 00:57:06,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.5) internal successors, (1284), 8 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:06,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:06,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 00:57:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,841 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:06,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 731257828, now seen corresponding path program 1 times [2023-08-30 00:57:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087107835] [2023-08-30 00:57:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:06,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:06,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:06,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 00:57:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:06,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 00:57:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:06,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:06,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:06,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087107835] [2023-08-30 00:57:06,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087107835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:06,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:06,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914102505] [2023-08-30 00:57:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:06,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:06,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-08-30 00:57:06,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 676 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:06,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:06,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-08-30 00:57:06,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:11,120 INFO L130 PetriNetUnfolder]: 28396/38096 cut-off events. [2023-08-30 00:57:11,120 INFO L131 PetriNetUnfolder]: For 20321/20321 co-relation queries the response was YES. [2023-08-30 00:57:11,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102802 conditions, 38096 events. 28396/38096 cut-off events. For 20321/20321 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 229998 event pairs, 3920 based on Foata normal form. 880/19496 useless extension candidates. Maximal degree in co-relation 102766. Up to 36321 conditions per place. [2023-08-30 00:57:11,469 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 94 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-08-30 00:57:11,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 918 flow [2023-08-30 00:57:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 00:57:11,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412837345003647 [2023-08-30 00:57:11,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 00:57:11,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 00:57:11,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:11,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 00:57:11,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:11,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:11,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:11,475 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 676 flow. Second operand 3 states and 605 transitions. [2023-08-30 00:57:11,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 918 flow [2023-08-30 00:57:11,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 897 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:11,502 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 684 flow [2023-08-30 00:57:11,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=684, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-08-30 00:57:11,503 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-08-30 00:57:11,503 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 684 flow [2023-08-30 00:57:11,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:11,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:11,503 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:11,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:11,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:11,715 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:11,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1102361743, now seen corresponding path program 2 times [2023-08-30 00:57:11,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:11,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010381057] [2023-08-30 00:57:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:57:11,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:11,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:57:11,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:57:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:57:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:11,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:57:11,927 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:57:12,050 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:57:12,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:57:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:57:12,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 00:57:12,202 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 00:57:12,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 00:57:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:57:12,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:12,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:12,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010381057] [2023-08-30 00:57:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010381057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:12,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:57:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993185851] [2023-08-30 00:57:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:12,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:12,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-08-30 00:57:12,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 684 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:12,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:12,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-08-30 00:57:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:15,730 INFO L130 PetriNetUnfolder]: 19296/26636 cut-off events. [2023-08-30 00:57:15,731 INFO L131 PetriNetUnfolder]: For 29049/29049 co-relation queries the response was YES. [2023-08-30 00:57:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75955 conditions, 26636 events. 19296/26636 cut-off events. For 29049/29049 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 163759 event pairs, 8160 based on Foata normal form. 1450/14316 useless extension candidates. Maximal degree in co-relation 75917. Up to 26203 conditions per place. [2023-08-30 00:57:15,896 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 71 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 00:57:15,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 818 flow [2023-08-30 00:57:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-30 00:57:15,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39223194748358864 [2023-08-30 00:57:15,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-30 00:57:15,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-30 00:57:15,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:15,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-30 00:57:15,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:15,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:15,902 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:15,902 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 684 flow. Second operand 4 states and 717 transitions. [2023-08-30 00:57:15,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 818 flow [2023-08-30 00:57:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 800 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 00:57:15,915 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 658 flow [2023-08-30 00:57:15,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=658, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-08-30 00:57:15,915 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 00:57:15,915 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 658 flow [2023-08-30 00:57:15,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:15,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:15,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:15,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:16,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642692, now seen corresponding path program 1 times [2023-08-30 00:57:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238821543] [2023-08-30 00:57:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:16,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:16,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:57:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:57:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:16,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 00:57:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:16,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:16,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238821543] [2023-08-30 00:57:16,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238821543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:16,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:16,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:57:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025966451] [2023-08-30 00:57:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:16,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:16,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:16,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 00:57:16,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 658 flow. Second operand has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:16,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:16,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 00:57:16,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:18,776 INFO L130 PetriNetUnfolder]: 12496/17776 cut-off events. [2023-08-30 00:57:18,776 INFO L131 PetriNetUnfolder]: For 4149/4149 co-relation queries the response was YES. [2023-08-30 00:57:18,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 17776 events. 12496/17776 cut-off events. For 4149/4149 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 109186 event pairs, 5300 based on Foata normal form. 0/9916 useless extension candidates. Maximal degree in co-relation 43388. Up to 17344 conditions per place. [2023-08-30 00:57:18,857 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2023-08-30 00:57:18,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 814 flow [2023-08-30 00:57:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-30 00:57:18,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40153172866520787 [2023-08-30 00:57:18,859 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-30 00:57:18,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-30 00:57:18,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:18,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-30 00:57:18,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:18,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:18,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:18,861 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 658 flow. Second operand 4 states and 734 transitions. [2023-08-30 00:57:18,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 814 flow [2023-08-30 00:57:18,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 801 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:18,867 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 673 flow [2023-08-30 00:57:18,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=673, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-30 00:57:18,868 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 29 predicate places. [2023-08-30 00:57:18,868 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 673 flow [2023-08-30 00:57:18,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:18,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:18,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:18,881 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 00:57:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:19,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:19,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2098642691, now seen corresponding path program 1 times [2023-08-30 00:57:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245398273] [2023-08-30 00:57:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:19,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:19,080 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:19,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 00:57:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:57:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:19,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:19,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245398273] [2023-08-30 00:57:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245398273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:19,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:57:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298068964] [2023-08-30 00:57:19,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:57:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:19,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:57:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:57:19,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2023-08-30 00:57:19,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 673 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:19,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:19,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2023-08-30 00:57:19,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:21,125 INFO L130 PetriNetUnfolder]: 11716/17096 cut-off events. [2023-08-30 00:57:21,125 INFO L131 PetriNetUnfolder]: For 3741/3741 co-relation queries the response was YES. [2023-08-30 00:57:21,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41149 conditions, 17096 events. 11716/17096 cut-off events. For 3741/3741 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 102946 event pairs, 2040 based on Foata normal form. 620/10486 useless extension candidates. Maximal degree in co-relation 41112. Up to 13741 conditions per place. [2023-08-30 00:57:21,204 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 87 selfloop transitions, 3 changer transitions 2/95 dead transitions. [2023-08-30 00:57:21,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 889 flow [2023-08-30 00:57:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:57:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:57:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 00:57:21,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2023-08-30 00:57:21,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 00:57:21,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 00:57:21,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:21,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 00:57:21,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:21,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:21,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:21,209 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 673 flow. Second operand 3 states and 597 transitions. [2023-08-30 00:57:21,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 889 flow [2023-08-30 00:57:21,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 871 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:57:21,214 INFO L231 Difference]: Finished difference. Result has 89 places, 84 transitions, 664 flow [2023-08-30 00:57:21,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=664, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2023-08-30 00:57:21,214 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 00:57:21,214 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 664 flow [2023-08-30 00:57:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:21,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:21,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:21,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-08-30 00:57:21,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:21,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:21,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 508704700, now seen corresponding path program 1 times [2023-08-30 00:57:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:21,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607756051] [2023-08-30 00:57:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:21,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:21,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:21,427 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:21,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:57:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:57:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:21,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:57:21,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607756051] [2023-08-30 00:57:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607756051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:57:21,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:57:21,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:57:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456856242] [2023-08-30 00:57:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:57:21,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:57:21,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:57:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:57:21,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 457 [2023-08-30 00:57:21,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 664 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:21,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:21,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 457 [2023-08-30 00:57:21,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:23,556 INFO L130 PetriNetUnfolder]: 10660/15618 cut-off events. [2023-08-30 00:57:23,556 INFO L131 PetriNetUnfolder]: For 4298/4298 co-relation queries the response was YES. [2023-08-30 00:57:23,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 15618 events. 10660/15618 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 93046 event pairs, 4050 based on Foata normal form. 30/9117 useless extension candidates. Maximal degree in co-relation 44468. Up to 15053 conditions per place. [2023-08-30 00:57:23,649 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 66 selfloop transitions, 14 changer transitions 16/99 dead transitions. [2023-08-30 00:57:23,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 918 flow [2023-08-30 00:57:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:57:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:57:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-30 00:57:23,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41575492341356673 [2023-08-30 00:57:23,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-30 00:57:23,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-30 00:57:23,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:23,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-30 00:57:23,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:23,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:23,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:23,655 INFO L175 Difference]: Start difference. First operand has 89 places, 84 transitions, 664 flow. Second operand 4 states and 760 transitions. [2023-08-30 00:57:23,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 918 flow [2023-08-30 00:57:23,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 99 transitions, 913 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:57:23,659 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 706 flow [2023-08-30 00:57:23,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-08-30 00:57:23,660 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2023-08-30 00:57:23,660 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 706 flow [2023-08-30 00:57:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:23,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:23,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:57:23,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 00:57:23,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:23,865 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:23,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash -376902577, now seen corresponding path program 1 times [2023-08-30 00:57:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:23,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829880930] [2023-08-30 00:57:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:57:23,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:23,867 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:23,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 00:57:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:57:23,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:57:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:23,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:57:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:57:25,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829880930] [2023-08-30 00:57:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829880930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:25,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 00:57:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343931909] [2023-08-30 00:57:25,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:57:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:57:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:57:28,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 457 [2023-08-30 00:57:28,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:28,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:28,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 457 [2023-08-30 00:57:28,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:33,039 INFO L130 PetriNetUnfolder]: 9142/13440 cut-off events. [2023-08-30 00:57:33,039 INFO L131 PetriNetUnfolder]: For 6653/6653 co-relation queries the response was YES. [2023-08-30 00:57:33,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39121 conditions, 13440 events. 9142/13440 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 78705 event pairs, 3402 based on Foata normal form. 288/9078 useless extension candidates. Maximal degree in co-relation 39081. Up to 10045 conditions per place. [2023-08-30 00:57:33,130 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 96 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2023-08-30 00:57:33,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1148 flow [2023-08-30 00:57:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:57:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:57:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1389 transitions. [2023-08-30 00:57:33,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799234135667396 [2023-08-30 00:57:33,135 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1389 transitions. [2023-08-30 00:57:33,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1389 transitions. [2023-08-30 00:57:33,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:33,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1389 transitions. [2023-08-30 00:57:33,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.625) internal successors, (1389), 8 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:33,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:33,139 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:33,139 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 706 flow. Second operand 8 states and 1389 transitions. [2023-08-30 00:57:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1148 flow [2023-08-30 00:57:33,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1101 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 00:57:33,165 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 770 flow [2023-08-30 00:57:33,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=770, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2023-08-30 00:57:33,166 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2023-08-30 00:57:33,166 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 770 flow [2023-08-30 00:57:33,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 166.25) internal successors, (1330), 8 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:33,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:57:33,166 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 00:57:33,174 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 00:57:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:33,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:57:33,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:57:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1003449302, now seen corresponding path program 3 times [2023-08-30 00:57:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:57:33,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441228518] [2023-08-30 00:57:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:57:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:57:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:57:33,369 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:57:33,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 00:57:33,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:57:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:57:33,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:57:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:57:33,633 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:57:33,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:57:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:34,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:57:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:57:36,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:57:36,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441228518] [2023-08-30 00:57:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441228518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:57:36,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:57:36,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 00:57:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279855625] [2023-08-30 00:57:36,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:57:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:57:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:57:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:57:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:57:56,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 00:57:56,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 770 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:56,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:57:56,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 00:57:56,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:58:03,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:05,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:07,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:09,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:11,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:13,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:16,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:18,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:19,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:21,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:58:33,870 INFO L130 PetriNetUnfolder]: 12664/18582 cut-off events. [2023-08-30 00:58:33,870 INFO L131 PetriNetUnfolder]: For 15452/15452 co-relation queries the response was YES. [2023-08-30 00:58:33,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57279 conditions, 18582 events. 12664/18582 cut-off events. For 15452/15452 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 112260 event pairs, 4734 based on Foata normal form. 24/13545 useless extension candidates. Maximal degree in co-relation 57239. Up to 7561 conditions per place. [2023-08-30 00:58:34,042 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 337 selfloop transitions, 65 changer transitions 0/405 dead transitions. [2023-08-30 00:58:34,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 405 transitions, 3072 flow [2023-08-30 00:58:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:58:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:58:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4417 transitions. [2023-08-30 00:58:34,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027169948942378 [2023-08-30 00:58:34,050 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4417 transitions. [2023-08-30 00:58:34,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4417 transitions. [2023-08-30 00:58:34,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:58:34,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4417 transitions. [2023-08-30 00:58:34,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 184.04166666666666) internal successors, (4417), 24 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:34,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:34,065 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:34,065 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 770 flow. Second operand 24 states and 4417 transitions. [2023-08-30 00:58:34,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 405 transitions, 3072 flow [2023-08-30 00:58:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 405 transitions, 2914 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 00:58:34,099 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 1150 flow [2023-08-30 00:58:34,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-08-30 00:58:34,100 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 70 predicate places. [2023-08-30 00:58:34,100 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 1150 flow [2023-08-30 00:58:34,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:34,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:58:34,101 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:58:34,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:58:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:34,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:58:34,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:58:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1868282756, now seen corresponding path program 2 times [2023-08-30 00:58:34,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:58:34,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457020560] [2023-08-30 00:58:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:58:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:58:34,313 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:58:34,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 00:58:34,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:58:34,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:58:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:58:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:58:34,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:58:34,568 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 00:58:34,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:58:34,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:58:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457020560] [2023-08-30 00:58:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457020560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:58:34,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:58:34,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:58:34,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955685864] [2023-08-30 00:58:34,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:58:34,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:58:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:58:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:58:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:58:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 457 [2023-08-30 00:58:34,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 1150 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:34,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:58:34,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 457 [2023-08-30 00:58:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:58:36,439 INFO L130 PetriNetUnfolder]: 8452/12750 cut-off events. [2023-08-30 00:58:36,439 INFO L131 PetriNetUnfolder]: For 12603/12603 co-relation queries the response was YES. [2023-08-30 00:58:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36130 conditions, 12750 events. 8452/12750 cut-off events. For 12603/12603 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 75914 event pairs, 2952 based on Foata normal form. 1944/10626 useless extension candidates. Maximal degree in co-relation 36077. Up to 12285 conditions per place. [2023-08-30 00:58:36,549 INFO L137 encePairwiseOnDemand]: 453/457 looper letters, 69 selfloop transitions, 41 changer transitions 0/113 dead transitions. [2023-08-30 00:58:36,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 113 transitions, 1354 flow [2023-08-30 00:58:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:58:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:58:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-08-30 00:58:36,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40043763676148797 [2023-08-30 00:58:36,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-08-30 00:58:36,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-08-30 00:58:36,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:58:36,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-08-30 00:58:36,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:36,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:36,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:36,554 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 1150 flow. Second operand 4 states and 732 transitions. [2023-08-30 00:58:36,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 113 transitions, 1354 flow [2023-08-30 00:58:36,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1191 flow, removed 35 selfloop flow, removed 12 redundant places. [2023-08-30 00:58:36,563 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 1053 flow [2023-08-30 00:58:36,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1053, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2023-08-30 00:58:36,564 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2023-08-30 00:58:36,564 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 1053 flow [2023-08-30 00:58:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:36,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:58:36,564 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 1, 1, 1] [2023-08-30 00:58:36,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:58:36,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:36,769 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 00:58:36,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:58:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1687515259, now seen corresponding path program 1 times [2023-08-30 00:58:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:58:36,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464256605] [2023-08-30 00:58:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:58:36,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:58:36,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:58:36,771 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 00:58:36,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 00:58:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:58:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:58:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:58:36,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 00:58:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:58:37,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:58:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:58:41,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:58:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464256605] [2023-08-30 00:58:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464256605] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:58:41,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:58:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-08-30 00:58:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532157683] [2023-08-30 00:58:41,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:58:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 00:58:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:58:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 00:58:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-08-30 00:59:15,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 457 [2023-08-30 00:59:15,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 1053 flow. Second operand has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:15,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:59:15,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 457 [2023-08-30 00:59:15,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:59:26,638 WARN L222 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 00:59:29,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:31,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:32,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:34,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:36,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:38,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:40,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:42,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:44,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:46,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:48,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:50,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:52,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 00:59:58,943 WARN L222 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:00:33,548 INFO L130 PetriNetUnfolder]: 18284/27570 cut-off events. [2023-08-30 01:00:33,548 INFO L131 PetriNetUnfolder]: For 16709/16709 co-relation queries the response was YES. [2023-08-30 01:00:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77700 conditions, 27570 events. 18284/27570 cut-off events. For 16709/16709 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 172403 event pairs, 6396 based on Foata normal form. 60/18891 useless extension candidates. Maximal degree in co-relation 77649. Up to 11233 conditions per place. [2023-08-30 01:00:33,861 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 689 selfloop transitions, 77 changer transitions 0/769 dead transitions. [2023-08-30 01:00:33,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 769 transitions, 5616 flow [2023-08-30 01:00:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 01:00:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 01:00:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5643 transitions. [2023-08-30 01:00:33,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115973741794311 [2023-08-30 01:00:33,870 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5643 transitions. [2023-08-30 01:00:33,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5643 transitions. [2023-08-30 01:00:33,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:00:33,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5643 transitions. [2023-08-30 01:00:33,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 188.1) internal successors, (5643), 30 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:33,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:33,883 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:33,883 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 1053 flow. Second operand 30 states and 5643 transitions. [2023-08-30 01:00:33,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 769 transitions, 5616 flow [2023-08-30 01:00:33,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 769 transitions, 5486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:00:33,903 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1490 flow [2023-08-30 01:00:33,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1490, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2023-08-30 01:00:33,904 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 102 predicate places. [2023-08-30 01:00:33,904 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1490 flow [2023-08-30 01:00:33,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 169.03333333333333) internal successors, (5071), 30 states have internal predecessors, (5071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:33,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:00:33,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:00:33,914 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 01:00:34,108 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 01:00:34,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:00:34,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:00:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1465022338, now seen corresponding path program 1 times [2023-08-30 01:00:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:00:34,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542411162] [2023-08-30 01:00:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:00:34,110 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 01:00:34,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:00:34,111 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 01:00:34,114 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 (24)] Waiting until timeout for monitored process [2023-08-30 01:00:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:00:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:00:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:00:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:00:34,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:00:34,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:00:34,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542411162] [2023-08-30 01:00:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542411162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:00:34,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:00:34,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:00:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65733501] [2023-08-30 01:00:34,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:00:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:00:34,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:00:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:00:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:00:34,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2023-08-30 01:00:34,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1490 flow. Second operand has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:34,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:00:34,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2023-08-30 01:00:34,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:00:40,805 INFO L130 PetriNetUnfolder]: 25975/41236 cut-off events. [2023-08-30 01:00:40,805 INFO L131 PetriNetUnfolder]: For 14526/14526 co-relation queries the response was YES. [2023-08-30 01:00:41,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114564 conditions, 41236 events. 25975/41236 cut-off events. For 14526/14526 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 297632 event pairs, 8112 based on Foata normal form. 78/29302 useless extension candidates. Maximal degree in co-relation 114496. Up to 18045 conditions per place. [2023-08-30 01:00:41,356 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 136 selfloop transitions, 30 changer transitions 2/170 dead transitions. [2023-08-30 01:00:41,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 170 transitions, 1936 flow [2023-08-30 01:00:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:00:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:00:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-30 01:00:41,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215900802334063 [2023-08-30 01:00:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-30 01:00:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-30 01:00:41,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:00:41,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-30 01:00:41,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:41,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:41,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:41,361 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1490 flow. Second operand 6 states and 1156 transitions. [2023-08-30 01:00:41,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 170 transitions, 1936 flow [2023-08-30 01:00:41,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 1818 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-08-30 01:00:41,383 INFO L231 Difference]: Finished difference. Result has 155 places, 136 transitions, 1446 flow [2023-08-30 01:00:41,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1446, PETRI_PLACES=155, PETRI_TRANSITIONS=136} [2023-08-30 01:00:41,383 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 96 predicate places. [2023-08-30 01:00:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 136 transitions, 1446 flow [2023-08-30 01:00:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:41,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:00:41,384 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-08-30 01:00:41,392 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 01:00:41,584 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 01:00:41,584 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:00:41,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:00:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1181897686, now seen corresponding path program 4 times [2023-08-30 01:00:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:00:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668087925] [2023-08-30 01:00:41,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:00:41,586 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 01:00:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:00:41,587 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 01:00:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 01:00:41,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:00:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:00:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 01:00:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:00:41,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:00:41,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:00:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:00:42,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:00:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:00:53,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:00:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668087925] [2023-08-30 01:00:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668087925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:00:53,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:00:53,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-08-30 01:00:53,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680387028] [2023-08-30 01:00:53,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:00:53,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 01:00:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:00:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 01:00:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-08-30 01:02:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 457 [2023-08-30 01:02:19,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 136 transitions, 1446 flow. Second operand has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:02:19,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:02:19,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 457 [2023-08-30 01:02:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:02:48,524 WARN L222 SmtUtils]: Spent 15.75s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:03:09,603 WARN L222 SmtUtils]: Spent 18.59s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:03:11,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:13,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:15,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:17,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:19,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:21,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:23,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:25,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:27,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:29,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:31,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:33,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:35,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:37,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:39,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:41,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:43,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:45,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:47,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:49,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:51,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:53,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:04:09,289 WARN L222 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:04:23,323 WARN L222 SmtUtils]: Spent 11.13s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:04:33,812 WARN L222 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:04:42,463 WARN L222 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:04:50,816 WARN L222 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:04:59,701 WARN L222 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:05:07,213 WARN L222 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:05:40,787 INFO L130 PetriNetUnfolder]: 25484/40338 cut-off events. [2023-08-30 01:05:40,787 INFO L131 PetriNetUnfolder]: For 35168/35168 co-relation queries the response was YES. [2023-08-30 01:05:41,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119042 conditions, 40338 events. 25484/40338 cut-off events. For 35168/35168 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 290250 event pairs, 12792 based on Foata normal form. 24/33030 useless extension candidates. Maximal degree in co-relation 118972. Up to 16849 conditions per place. [2023-08-30 01:05:41,273 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 680 selfloop transitions, 130 changer transitions 0/813 dead transitions. [2023-08-30 01:05:41,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 813 transitions, 6827 flow [2023-08-30 01:05:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 01:05:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 01:05:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 8786 transitions. [2023-08-30 01:05:41,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40052881108679794 [2023-08-30 01:05:41,284 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 8786 transitions. [2023-08-30 01:05:41,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 8786 transitions. [2023-08-30 01:05:41,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:41,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 8786 transitions. [2023-08-30 01:05:41,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 183.04166666666666) internal successors, (8786), 48 states have internal predecessors, (8786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:41,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:41,314 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 457.0) internal successors, (22393), 49 states have internal predecessors, (22393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:41,314 INFO L175 Difference]: Start difference. First operand has 155 places, 136 transitions, 1446 flow. Second operand 48 states and 8786 transitions. [2023-08-30 01:05:41,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 813 transitions, 6827 flow [2023-08-30 01:05:41,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 813 transitions, 6651 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-30 01:05:41,387 INFO L231 Difference]: Finished difference. Result has 225 places, 187 transitions, 2371 flow [2023-08-30 01:05:41,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2371, PETRI_PLACES=225, PETRI_TRANSITIONS=187} [2023-08-30 01:05:41,387 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 166 predicate places. [2023-08-30 01:05:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 187 transitions, 2371 flow [2023-08-30 01:05:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 171.0) internal successors, (8208), 48 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:41,400 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 01:05:41,589 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 01:05:41,589 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:05:41,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1564745327, now seen corresponding path program 1 times [2023-08-30 01:05:41,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:41,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163959514] [2023-08-30 01:05:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:05:41,590 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 01:05:41,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:41,591 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:05:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 01:05:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:41,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:05:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:05:41,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:05:41,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163959514] [2023-08-30 01:05:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163959514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:05:41,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:05:41,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:05:41,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233167328] [2023-08-30 01:05:41,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:05:41,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:05:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:05:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:05:42,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 457 [2023-08-30 01:05:42,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 187 transitions, 2371 flow. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:42,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:42,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 457 [2023-08-30 01:05:42,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:49,505 INFO L130 PetriNetUnfolder]: 26966/43764 cut-off events. [2023-08-30 01:05:49,505 INFO L131 PetriNetUnfolder]: For 29170/29170 co-relation queries the response was YES. [2023-08-30 01:05:50,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127371 conditions, 43764 events. 26966/43764 cut-off events. For 29170/29170 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 333037 event pairs, 5148 based on Foata normal form. 1092/37212 useless extension candidates. Maximal degree in co-relation 127276. Up to 32449 conditions per place. [2023-08-30 01:05:50,274 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 197 selfloop transitions, 5 changer transitions 0/205 dead transitions. [2023-08-30 01:05:50,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 2828 flow [2023-08-30 01:05:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:05:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:05:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-08-30 01:05:50,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152078774617068 [2023-08-30 01:05:50,277 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-08-30 01:05:50,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-08-30 01:05:50,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:50,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-08-30 01:05:50,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:50,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:50,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:50,279 INFO L175 Difference]: Start difference. First operand has 225 places, 187 transitions, 2371 flow. Second operand 4 states and 759 transitions. [2023-08-30 01:05:50,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 2828 flow [2023-08-30 01:05:50,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 205 transitions, 2539 flow, removed 66 selfloop flow, removed 21 redundant places. [2023-08-30 01:05:50,330 INFO L231 Difference]: Finished difference. Result has 208 places, 189 transitions, 2109 flow [2023-08-30 01:05:50,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2109, PETRI_PLACES=208, PETRI_TRANSITIONS=189} [2023-08-30 01:05:50,330 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 149 predicate places. [2023-08-30 01:05:50,330 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 189 transitions, 2109 flow [2023-08-30 01:05:50,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:50,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:50,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:50,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-08-30 01:05:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:50,533 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:05:50,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 771711053, now seen corresponding path program 2 times [2023-08-30 01:05:50,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:50,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119054156] [2023-08-30 01:05:50,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:05:50,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:50,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:50,536 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:05:50,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 01:05:50,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:05:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:05:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:50,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 01:05:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:05:51,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 01:05:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:05:51,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:05:51,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119054156] [2023-08-30 01:05:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119054156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:05:51,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:05:51,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:05:51,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594835571] [2023-08-30 01:05:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:05:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 01:05:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 01:05:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 01:05:52,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 457 [2023-08-30 01:05:52,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 189 transitions, 2109 flow. Second operand has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:52,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:52,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 457 [2023-08-30 01:05:52,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:00,747 INFO L130 PetriNetUnfolder]: 27210/44643 cut-off events. [2023-08-30 01:06:00,747 INFO L131 PetriNetUnfolder]: For 53840/53840 co-relation queries the response was YES. [2023-08-30 01:06:01,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143018 conditions, 44643 events. 27210/44643 cut-off events. For 53840/53840 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 345092 event pairs, 5250 based on Foata normal form. 1050/39318 useless extension candidates. Maximal degree in co-relation 142921. Up to 32026 conditions per place. [2023-08-30 01:06:01,596 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 198 selfloop transitions, 5 changer transitions 0/206 dead transitions. [2023-08-30 01:06:01,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 206 transitions, 2570 flow [2023-08-30 01:06:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:06:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:06:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2023-08-30 01:06:01,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399890590809628 [2023-08-30 01:06:01,599 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2023-08-30 01:06:01,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2023-08-30 01:06:01,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:01,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2023-08-30 01:06:01,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:01,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:01,602 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 457.0) internal successors, (2285), 5 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:01,602 INFO L175 Difference]: Start difference. First operand has 208 places, 189 transitions, 2109 flow. Second operand 4 states and 731 transitions. [2023-08-30 01:06:01,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 206 transitions, 2570 flow [2023-08-30 01:06:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 206 transitions, 2561 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 01:06:01,668 INFO L231 Difference]: Finished difference. Result has 210 places, 190 transitions, 2125 flow [2023-08-30 01:06:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2125, PETRI_PLACES=210, PETRI_TRANSITIONS=190} [2023-08-30 01:06:01,669 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 151 predicate places. [2023-08-30 01:06:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 190 transitions, 2125 flow [2023-08-30 01:06:01,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 174.14285714285714) internal successors, (1219), 7 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:01,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:01,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:01,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:01,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:01,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:06:01,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1284076598, now seen corresponding path program 1 times [2023-08-30 01:06:01,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852384386] [2023-08-30 01:06:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:06:01,882 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 01:06:01,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:01,883 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:06:01,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 01:06:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:06:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:06:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:06:02,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:06:02,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852384386] [2023-08-30 01:06:02,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852384386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:02,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 01:06:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003712144] [2023-08-30 01:06:02,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:02,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:06:02,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:02,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:06:02,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:06:03,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 457 [2023-08-30 01:06:03,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 190 transitions, 2125 flow. Second operand has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:03,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:03,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 457 [2023-08-30 01:06:03,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:11,414 INFO L130 PetriNetUnfolder]: 22910/38493 cut-off events. [2023-08-30 01:06:11,414 INFO L131 PetriNetUnfolder]: For 65465/65465 co-relation queries the response was YES. [2023-08-30 01:06:11,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132744 conditions, 38493 events. 22910/38493 cut-off events. For 65465/65465 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 299976 event pairs, 11250 based on Foata normal form. 1175/34718 useless extension candidates. Maximal degree in co-relation 132646. Up to 28756 conditions per place. [2023-08-30 01:06:12,084 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 240 selfloop transitions, 27 changer transitions 20/290 dead transitions. [2023-08-30 01:06:12,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 290 transitions, 3526 flow [2023-08-30 01:06:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:06:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:06:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1625 transitions. [2023-08-30 01:06:12,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950887430099684 [2023-08-30 01:06:12,087 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1625 transitions. [2023-08-30 01:06:12,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1625 transitions. [2023-08-30 01:06:12,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:12,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1625 transitions. [2023-08-30 01:06:12,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.55555555555554) internal successors, (1625), 9 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:12,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:12,092 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:12,092 INFO L175 Difference]: Start difference. First operand has 210 places, 190 transitions, 2125 flow. Second operand 9 states and 1625 transitions. [2023-08-30 01:06:12,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 290 transitions, 3526 flow [2023-08-30 01:06:12,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 290 transitions, 3510 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 01:06:12,182 INFO L231 Difference]: Finished difference. Result has 219 places, 192 transitions, 2277 flow [2023-08-30 01:06:12,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=219, PETRI_TRANSITIONS=192} [2023-08-30 01:06:12,183 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 160 predicate places. [2023-08-30 01:06:12,183 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 192 transitions, 2277 flow [2023-08-30 01:06:12,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.4) internal successors, (1764), 10 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:12,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:12,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:12,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:12,402 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:06:12,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 391159394, now seen corresponding path program 2 times [2023-08-30 01:06:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161019170] [2023-08-30 01:06:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:06:12,403 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 01:06:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:12,404 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:06:12,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 01:06:12,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:06:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:06:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:12,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 01:06:12,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:06:12,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 01:06:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:06:13,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:13,179 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1121 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1121) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 01:06:13,597 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:13,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 279 treesize of output 257 [2023-08-30 01:06:13,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 97 [2023-08-30 01:06:13,795 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:13,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 155 treesize of output 149 [2023-08-30 01:06:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:06:14,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161019170] [2023-08-30 01:06:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161019170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:14,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-08-30 01:06:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355114577] [2023-08-30 01:06:14,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 01:06:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 01:06:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2023-08-30 01:06:14,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 457 [2023-08-30 01:06:14,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 192 transitions, 2277 flow. Second operand has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:14,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:14,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 457 [2023-08-30 01:06:14,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:24,616 INFO L130 PetriNetUnfolder]: 27507/44700 cut-off events. [2023-08-30 01:06:24,616 INFO L131 PetriNetUnfolder]: For 74177/74177 co-relation queries the response was YES. [2023-08-30 01:06:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154387 conditions, 44700 events. 27507/44700 cut-off events. For 74177/74177 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 339265 event pairs, 3075 based on Foata normal form. 500/39550 useless extension candidates. Maximal degree in co-relation 154286. Up to 27076 conditions per place. [2023-08-30 01:06:25,590 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 172 selfloop transitions, 57 changer transitions 2/233 dead transitions. [2023-08-30 01:06:25,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 233 transitions, 2915 flow [2023-08-30 01:06:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:06:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:06:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1125 transitions. [2023-08-30 01:06:25,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35167239762425756 [2023-08-30 01:06:25,593 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1125 transitions. [2023-08-30 01:06:25,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1125 transitions. [2023-08-30 01:06:25,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:25,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1125 transitions. [2023-08-30 01:06:25,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:25,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:25,596 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:25,596 INFO L175 Difference]: Start difference. First operand has 219 places, 192 transitions, 2277 flow. Second operand 7 states and 1125 transitions. [2023-08-30 01:06:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 233 transitions, 2915 flow [2023-08-30 01:06:25,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 233 transitions, 2885 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 01:06:25,890 INFO L231 Difference]: Finished difference. Result has 224 places, 195 transitions, 2404 flow [2023-08-30 01:06:25,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2404, PETRI_PLACES=224, PETRI_TRANSITIONS=195} [2023-08-30 01:06:25,890 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 165 predicate places. [2023-08-30 01:06:25,890 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 195 transitions, 2404 flow [2023-08-30 01:06:25,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:25,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:25,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:25,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:26,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:26,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:06:26,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash 552670952, now seen corresponding path program 3 times [2023-08-30 01:06:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211310936] [2023-08-30 01:06:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:06:26,098 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 01:06:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:26,099 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:06:26,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 01:06:26,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:06:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:06:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:26,370 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 18 treesize of output 16 [2023-08-30 01:06:26,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 01:06:26,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 01:06:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:06:26,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:26,773 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1175 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1175) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 01:06:27,159 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:27,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 475 treesize of output 418 [2023-08-30 01:06:27,316 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:27,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 209 treesize of output 203 [2023-08-30 01:06:27,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:06:27,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 70 [2023-08-30 01:06:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-08-30 01:06:28,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:28,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211310936] [2023-08-30 01:06:28,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211310936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:28,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:28,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 01:06:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654137858] [2023-08-30 01:06:28,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 01:06:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 01:06:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2023-08-30 01:06:28,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 457 [2023-08-30 01:06:28,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 195 transitions, 2404 flow. Second operand has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:28,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:28,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 457 [2023-08-30 01:06:28,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:40,668 INFO L130 PetriNetUnfolder]: 36357/57850 cut-off events. [2023-08-30 01:06:40,668 INFO L131 PetriNetUnfolder]: For 116096/116096 co-relation queries the response was YES. [2023-08-30 01:06:41,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211710 conditions, 57850 events. 36357/57850 cut-off events. For 116096/116096 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 440226 event pairs, 3575 based on Foata normal form. 400/53200 useless extension candidates. Maximal degree in co-relation 211607. Up to 30301 conditions per place. [2023-08-30 01:06:42,076 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 175 selfloop transitions, 61 changer transitions 0/238 dead transitions. [2023-08-30 01:06:42,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 238 transitions, 3076 flow [2023-08-30 01:06:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:06:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:06:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2023-08-30 01:06:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363551109721788 [2023-08-30 01:06:42,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2023-08-30 01:06:42,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2023-08-30 01:06:42,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:42,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2023-08-30 01:06:42,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:42,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:42,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:42,083 INFO L175 Difference]: Start difference. First operand has 224 places, 195 transitions, 2404 flow. Second operand 7 states and 1076 transitions. [2023-08-30 01:06:42,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 238 transitions, 3076 flow [2023-08-30 01:06:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 238 transitions, 2954 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 01:06:43,564 INFO L231 Difference]: Finished difference. Result has 229 places, 202 transitions, 2491 flow [2023-08-30 01:06:43,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2491, PETRI_PLACES=229, PETRI_TRANSITIONS=202} [2023-08-30 01:06:43,567 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 170 predicate places. [2023-08-30 01:06:43,567 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 202 transitions, 2491 flow [2023-08-30 01:06:43,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.71428571428572) internal successors, (2054), 14 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:43,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:43,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:43,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:43,768 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:06:43,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -530428964, now seen corresponding path program 4 times [2023-08-30 01:06:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:43,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22110848] [2023-08-30 01:06:43,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:06:43,769 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 01:06:43,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:43,770 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:06:43,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 01:06:44,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:06:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:06:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 01:06:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:44,125 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 18 treesize of output 16 [2023-08-30 01:06:44,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 01:06:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:06:44,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 01:06:44,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-08-30 01:06:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 01:06:44,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:45,006 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1230) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 01:06:45,037 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1229 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1230) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2023-08-30 01:06:45,403 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:45,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 467 treesize of output 445 [2023-08-30 01:06:45,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 231 [2023-08-30 01:06:45,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 177 [2023-08-30 01:06:45,570 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 01:06:45,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 235 treesize of output 229 [2023-08-30 01:06:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-08-30 01:06:46,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22110848] [2023-08-30 01:06:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22110848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:46,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:46,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 01:06:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688701397] [2023-08-30 01:06:46,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 01:06:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 01:06:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=145, Unknown=2, NotChecked=50, Total=240 [2023-08-30 01:06:46,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 457 [2023-08-30 01:06:46,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 202 transitions, 2491 flow. Second operand has 16 states, 16 states have (on average 139.4375) internal successors, (2231), 16 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:46,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:46,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 457 [2023-08-30 01:06:46,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:07:01,189 INFO L130 PetriNetUnfolder]: 40557/64450 cut-off events. [2023-08-30 01:07:01,189 INFO L131 PetriNetUnfolder]: For 180196/180196 co-relation queries the response was YES. [2023-08-30 01:07:02,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247313 conditions, 64450 events. 40557/64450 cut-off events. For 180196/180196 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 497707 event pairs, 3625 based on Foata normal form. 400/58850 useless extension candidates. Maximal degree in co-relation 247207. Up to 25801 conditions per place. [2023-08-30 01:07:02,655 INFO L137 encePairwiseOnDemand]: 446/457 looper letters, 178 selfloop transitions, 69 changer transitions 2/251 dead transitions. [2023-08-30 01:07:02,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 251 transitions, 3212 flow [2023-08-30 01:07:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 01:07:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 01:07:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1174 transitions. [2023-08-30 01:07:02,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211159737417943 [2023-08-30 01:07:02,658 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1174 transitions. [2023-08-30 01:07:02,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1174 transitions. [2023-08-30 01:07:02,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:07:02,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1174 transitions. [2023-08-30 01:07:02,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 146.75) internal successors, (1174), 8 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:02,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:02,663 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:02,663 INFO L175 Difference]: Start difference. First operand has 229 places, 202 transitions, 2491 flow. Second operand 8 states and 1174 transitions. [2023-08-30 01:07:02,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 251 transitions, 3212 flow [2023-08-30 01:07:03,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 251 transitions, 3114 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:07:03,739 INFO L231 Difference]: Finished difference. Result has 237 places, 210 transitions, 2626 flow [2023-08-30 01:07:03,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2626, PETRI_PLACES=237, PETRI_TRANSITIONS=210} [2023-08-30 01:07:03,740 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 178 predicate places. [2023-08-30 01:07:03,740 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 210 transitions, 2626 flow [2023-08-30 01:07:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 139.4375) internal successors, (2231), 16 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:03,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:07:03,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:07:03,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-30 01:07:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:07:03,942 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:07:03,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:07:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1699281233, now seen corresponding path program 1 times [2023-08-30 01:07:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:07:03,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67455603] [2023-08-30 01:07:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:07:03,943 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 01:07:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:07:03,944 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:07:03,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 01:07:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:07:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:07:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:07:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:07:04,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:07:04,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:07:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67455603] [2023-08-30 01:07:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67455603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:07:04,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:07:04,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:07:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488550816] [2023-08-30 01:07:04,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:07:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:07:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:07:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:07:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:07:04,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 457 [2023-08-30 01:07:04,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 210 transitions, 2626 flow. Second operand has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:04,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:07:04,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 457 [2023-08-30 01:07:04,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:07:18,335 INFO L130 PetriNetUnfolder]: 40482/65250 cut-off events. [2023-08-30 01:07:18,335 INFO L131 PetriNetUnfolder]: For 304296/304296 co-relation queries the response was YES. [2023-08-30 01:07:19,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287667 conditions, 65250 events. 40482/65250 cut-off events. For 304296/304296 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 510193 event pairs, 13425 based on Foata normal form. 450/65700 useless extension candidates. Maximal degree in co-relation 287557. Up to 51176 conditions per place. [2023-08-30 01:07:19,967 INFO L137 encePairwiseOnDemand]: 449/457 looper letters, 221 selfloop transitions, 7 changer transitions 5/235 dead transitions. [2023-08-30 01:07:19,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 235 transitions, 3214 flow [2023-08-30 01:07:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:07:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:07:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-08-30 01:07:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40656455142231945 [2023-08-30 01:07:19,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-08-30 01:07:19,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-08-30 01:07:19,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:07:19,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-08-30 01:07:19,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:19,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:19,972 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:19,972 INFO L175 Difference]: Start difference. First operand has 237 places, 210 transitions, 2626 flow. Second operand 5 states and 929 transitions. [2023-08-30 01:07:19,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 235 transitions, 3214 flow [2023-08-30 01:07:25,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 235 transitions, 3085 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 01:07:25,205 INFO L231 Difference]: Finished difference. Result has 237 places, 212 transitions, 2544 flow [2023-08-30 01:07:25,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2544, PETRI_PLACES=237, PETRI_TRANSITIONS=212} [2023-08-30 01:07:25,205 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 178 predicate places. [2023-08-30 01:07:25,205 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 212 transitions, 2544 flow [2023-08-30 01:07:25,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:07:25,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:07:25,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:07:25,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 01:07:25,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:07:25,407 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 01:07:25,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:07:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash -173216341, now seen corresponding path program 2 times [2023-08-30 01:07:25,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:07:25,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815253010] [2023-08-30 01:07:25,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:07:25,408 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 01:07:25,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:07:25,409 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:07:25,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 01:07:25,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:07:25,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:07:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:07:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:07:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:07:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates...