./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:09:55,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:09:55,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:09:55,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:09:55,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:09:55,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:09:55,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:09:55,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:09:55,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:09:55,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:09:55,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:09:55,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:09:55,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:09:55,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:09:55,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:09:55,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:09:55,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:09:55,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:09:55,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:09:55,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:09:55,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:09:55,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:09:55,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:09:55,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:09:55,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:09:55,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:09:55,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:09:55,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:09:55,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:09:55,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:09:55,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:09:55,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:09:55,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:09:55,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:09:55,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:09:55,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:09:55,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:09:55,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:09:55,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:09:55,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:09:55,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:09:55,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:09:56,017 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:09:56,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:09:56,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:09:56,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:09:56,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:09:56,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:09:56,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:09:56,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:09:56,020 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:09:56,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:09:56,021 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:09:56,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:09:56,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:09:56,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:09:56,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:09:56,022 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:09:56,023 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:09:56,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:09:56,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:09:56,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:09:56,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:09:56,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:09:56,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:09:56,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:09:56,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:09:56,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:09:56,025 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:09:56,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:09:56,025 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:09:56,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:09:56,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:09:56,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:09:56,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:09:56,380 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:09:56,380 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:09:56,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-30 06:09:57,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:09:57,851 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:09:57,852 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-30 06:09:57,858 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb066f50c/26663e6f5b644e1c84fe193e5ba800ce/FLAG24fc52f9b [2023-08-30 06:09:57,870 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb066f50c/26663e6f5b644e1c84fe193e5ba800ce [2023-08-30 06:09:57,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:09:57,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:09:57,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:09:57,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:09:57,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:09:57,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:09:57" (1/1) ... [2023-08-30 06:09:57,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ed73bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:09:57, skipping insertion in model container [2023-08-30 06:09:57,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:09:57" (1/1) ... [2023-08-30 06:09:57,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:09:57,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:09:58,107 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-30 06:09:58,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:09:58,139 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:09:58,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c0a7d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:09:58, skipping insertion in model container [2023-08-30 06:09:58,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:09:58,142 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:09:58,144 INFO L158 Benchmark]: Toolchain (without parser) took 268.85ms. Allocated memory is still 94.4MB. Free memory was 72.2MB in the beginning and 61.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 06:09:58,144 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:09:58,145 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.89ms. Allocated memory is still 94.4MB. Free memory was 71.9MB in the beginning and 61.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:09:58,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.89ms. Allocated memory is still 94.4MB. Free memory was 71.9MB in the beginning and 61.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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-bad-dot-product-alt.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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:09:59,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:09:59,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:09:59,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:09:59,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:09:59,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:09:59,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:09:59,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:09:59,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:09:59,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:09:59,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:09:59,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:09:59,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:09:59,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:09:59,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:09:59,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:09:59,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:09:59,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:09:59,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:09:59,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:09:59,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:10:00,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:10:00,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:10:00,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:10:00,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:10:00,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:10:00,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:10:00,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:10:00,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:10:00,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:10:00,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:10:00,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:10:00,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:10:00,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:10:00,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:10:00,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:10:00,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:10:00,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:10:00,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:10:00,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:10:00,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:10:00,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:10:00,056 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:10:00,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:10:00,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:10:00,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:10:00,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:10:00,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:10:00,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:10:00,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:10:00,062 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:10:00,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:10:00,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:10:00,063 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:10:00,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:10:00,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:10:00,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:10:00,064 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:10:00,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:10:00,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:10:00,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:10:00,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:10:00,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:10:00,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:10:00,066 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:10:00,066 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:10:00,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:10:00,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:10:00,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:10:00,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:00,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:10:00,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:10:00,067 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:10:00,068 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:10:00,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:10:00,068 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:10:00,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:10:00,068 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:10:00,069 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:10:00,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:10:00,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:10:00,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:10:00,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:10:00,426 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:10:00,426 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:10:00,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-30 06:10:01,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:10:01,841 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:10:01,843 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-08-30 06:10:01,856 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2c7d646/83059eec042042fb99010b1ac961b75e/FLAG32696b82d [2023-08-30 06:10:01,877 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2c7d646/83059eec042042fb99010b1ac961b75e [2023-08-30 06:10:01,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:10:01,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:10:01,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:01,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:10:01,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:10:01,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:01" (1/1) ... [2023-08-30 06:10:01,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1deeb686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:01, skipping insertion in model container [2023-08-30 06:10:01,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:10:01" (1/1) ... [2023-08-30 06:10:01,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:10:01,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:02,133 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-30 06:10:02,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:02,161 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:10:02,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:10:02,200 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-30 06:10:02,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:02,228 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:10:02,270 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-bad-dot-product-alt.wvr.c[3182,3195] [2023-08-30 06:10:02,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:10:02,299 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:02,299 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:10:02,305 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:10:02,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02 WrapperNode [2023-08-30 06:10:02,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:10:02,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:02,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:10:02,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:10:02,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,382 INFO L138 Inliner]: procedures = 30, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 359 [2023-08-30 06:10:02,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:10:02,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:10:02,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:10:02,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:10:02,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:10:02,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:10:02,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:10:02,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:10:02,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (1/1) ... [2023-08-30 06:10:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:10:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:10:02,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:10:02,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:10:02,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:10:02,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:10:02,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:10:02,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:10:02,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:10:02,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:10:02,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:10:02,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:10:02,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:10:02,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:10:02,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:10:02,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:10:02,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:10:02,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:10:02,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:10:02,699 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:10:02,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:10:03,737 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:10:04,008 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:10:04,009 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-30 06:10:04,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:04 BoogieIcfgContainer [2023-08-30 06:10:04,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:10:04,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:10:04,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:10:04,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:10:04,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:10:01" (1/3) ... [2023-08-30 06:10:04,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b7170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:04, skipping insertion in model container [2023-08-30 06:10:04,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:10:02" (2/3) ... [2023-08-30 06:10:04,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b7170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:10:04, skipping insertion in model container [2023-08-30 06:10:04,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:10:04" (3/3) ... [2023-08-30 06:10:04,022 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2023-08-30 06:10:04,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:10:04,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2023-08-30 06:10:04,048 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:10:04,260 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:10:04,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 395 transitions, 814 flow [2023-08-30 06:10:04,504 INFO L130 PetriNetUnfolder]: 35/392 cut-off events. [2023-08-30 06:10:04,505 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:04,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 392 events. 35/392 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1070 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 302. Up to 2 conditions per place. [2023-08-30 06:10:04,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 370 places, 395 transitions, 814 flow [2023-08-30 06:10:04,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 388 transitions, 794 flow [2023-08-30 06:10:04,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:10:04,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 363 places, 388 transitions, 794 flow [2023-08-30 06:10:04,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 363 places, 388 transitions, 794 flow [2023-08-30 06:10:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 388 transitions, 794 flow [2023-08-30 06:10:04,653 INFO L130 PetriNetUnfolder]: 35/388 cut-off events. [2023-08-30 06:10:04,654 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:10:04,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 388 events. 35/388 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1064 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 302. Up to 2 conditions per place. [2023-08-30 06:10:04,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 24090 [2023-08-30 06:11:35,852 INFO L134 LiptonReduction]: Checked pairs total: 37816 [2023-08-30 06:11:35,852 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-08-30 06:11:35,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:11:35,873 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;@6031125d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:11:35,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-08-30 06:11:35,875 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:11:35,876 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:11:35,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:35,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:35,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:11:35,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:35,881 INFO L85 PathProgramCache]: Analyzing trace with hash 58542, now seen corresponding path program 1 times [2023-08-30 06:11:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:35,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095190853] [2023-08-30 06:11:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:35,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:35,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:35,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:11:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:36,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:11:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:36,168 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:11:36,169 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 06:11:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:36,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:36,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095190853] [2023-08-30 06:11:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095190853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869643289] [2023-08-30 06:11:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:36,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:36,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:36,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 872 [2023-08-30 06:11:36,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 110 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:36,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:36,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 872 [2023-08-30 06:11:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:11:47,317 INFO L130 PetriNetUnfolder]: 70595/88893 cut-off events. [2023-08-30 06:11:47,317 INFO L131 PetriNetUnfolder]: For 857/857 co-relation queries the response was YES. [2023-08-30 06:11:47,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178713 conditions, 88893 events. 70595/88893 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 6286. Compared 526214 event pairs, 44649 based on Foata normal form. 0/19155 useless extension candidates. Maximal degree in co-relation 171375. Up to 88832 conditions per place. [2023-08-30 06:11:47,898 INFO L137 encePairwiseOnDemand]: 850/872 looper letters, 85 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-30 06:11:47,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 368 flow [2023-08-30 06:11:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:11:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:11:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1106 transitions. [2023-08-30 06:11:47,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422782874617737 [2023-08-30 06:11:47,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1106 transitions. [2023-08-30 06:11:47,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1106 transitions. [2023-08-30 06:11:47,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:11:47,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1106 transitions. [2023-08-30 06:11:47,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:47,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:47,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:47,953 INFO L175 Difference]: Start difference. First operand has 110 places, 110 transitions, 238 flow. Second operand 3 states and 1106 transitions. [2023-08-30 06:11:47,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 368 flow [2023-08-30 06:11:48,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 356 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:11:48,057 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 186 flow [2023-08-30 06:11:48,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2023-08-30 06:11:48,063 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -24 predicate places. [2023-08-30 06:11:48,064 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 186 flow [2023-08-30 06:11:48,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:48,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:11:48,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:11:48,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 06:11:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:48,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:11:48,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:11:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash 58541, now seen corresponding path program 1 times [2023-08-30 06:11:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:11:48,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210159253] [2023-08-30 06:11:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:11:48,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:11:48,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:11:48,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:11:48,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:11:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:11:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:11:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:11:48,483 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:11:48,483 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 06:11:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:11:48,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:11:48,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:11:48,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210159253] [2023-08-30 06:11:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210159253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:11:48,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:11:48,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:11:48,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013073814] [2023-08-30 06:11:48,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:11:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:11:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:11:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:11:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:11:48,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 872 [2023-08-30 06:11:48,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:11:48,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:11:48,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 872 [2023-08-30 06:11:48,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:06,039 INFO L130 PetriNetUnfolder]: 141054/177647 cut-off events. [2023-08-30 06:12:06,039 INFO L131 PetriNetUnfolder]: For 268/268 co-relation queries the response was YES. [2023-08-30 06:12:06,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355932 conditions, 177647 events. 141054/177647 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 10486. Compared 1104620 event pairs, 89218 based on Foata normal form. 0/38483 useless extension candidates. Maximal degree in co-relation 355926. Up to 88834 conditions per place. [2023-08-30 06:12:06,844 INFO L137 encePairwiseOnDemand]: 862/872 looper letters, 161 selfloop transitions, 7 changer transitions 0/171 dead transitions. [2023-08-30 06:12:06,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 171 transitions, 692 flow [2023-08-30 06:12:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:12:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:12:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1167 transitions. [2023-08-30 06:12:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461009174311927 [2023-08-30 06:12:06,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1167 transitions. [2023-08-30 06:12:06,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1167 transitions. [2023-08-30 06:12:06,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:06,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1167 transitions. [2023-08-30 06:12:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:06,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:06,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:06,860 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 186 flow. Second operand 3 states and 1167 transitions. [2023-08-30 06:12:06,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 171 transitions, 692 flow [2023-08-30 06:12:06,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 171 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:12:06,866 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 243 flow [2023-08-30 06:12:06,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-08-30 06:12:06,867 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -21 predicate places. [2023-08-30 06:12:06,869 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 243 flow [2023-08-30 06:12:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:06,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:06,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:12:06,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:12:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:07,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:12:07,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1820519, now seen corresponding path program 1 times [2023-08-30 06:12:07,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:07,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847481554] [2023-08-30 06:12:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:07,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:07,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:12:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:07,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:12:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:07,262 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:12:07,263 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 06:12:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:07,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:12:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:07,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847481554] [2023-08-30 06:12:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847481554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:12:07,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:12:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:12:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558165628] [2023-08-30 06:12:07,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:12:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:12:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:12:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:12:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 872 [2023-08-30 06:12:09,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:09,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:09,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 872 [2023-08-30 06:12:09,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:12:10,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:12:37,820 INFO L130 PetriNetUnfolder]: 211523/266417 cut-off events. [2023-08-30 06:12:37,820 INFO L131 PetriNetUnfolder]: For 388/388 co-relation queries the response was YES. [2023-08-30 06:12:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533830 conditions, 266417 events. 211523/266417 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 16345. Compared 1731924 event pairs, 133787 based on Foata normal form. 0/57830 useless extension candidates. Maximal degree in co-relation 533821. Up to 88836 conditions per place. [2023-08-30 06:12:39,029 INFO L137 encePairwiseOnDemand]: 859/872 looper letters, 237 selfloop transitions, 29 changer transitions 0/269 dead transitions. [2023-08-30 06:12:39,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 269 transitions, 1175 flow [2023-08-30 06:12:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:12:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:12:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2177 transitions. [2023-08-30 06:12:39,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160932721712538 [2023-08-30 06:12:39,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2177 transitions. [2023-08-30 06:12:39,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2177 transitions. [2023-08-30 06:12:39,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:12:39,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2177 transitions. [2023-08-30 06:12:39,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 362.8333333333333) internal successors, (2177), 6 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:39,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 872.0) internal successors, (6104), 7 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:39,067 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 872.0) internal successors, (6104), 7 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:39,067 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 243 flow. Second operand 6 states and 2177 transitions. [2023-08-30 06:12:39,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 269 transitions, 1175 flow [2023-08-30 06:12:39,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 269 transitions, 1153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:12:39,075 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 448 flow [2023-08-30 06:12:39,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2023-08-30 06:12:39,076 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -14 predicate places. [2023-08-30 06:12:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 448 flow [2023-08-30 06:12:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:12:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:12:39,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:12:39,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:39,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:12:39,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:12:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 56536170, now seen corresponding path program 1 times [2023-08-30 06:12:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:12:39,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780679100] [2023-08-30 06:12:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:12:39,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:12:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:12:39,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:12:39,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:12:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:12:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:12:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:12:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:12:39,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:12:39,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:12:39,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780679100] [2023-08-30 06:12:39,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780679100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:12:39,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:12:39,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:12:39,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380820603] [2023-08-30 06:12:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:12:39,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:12:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:12:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:12:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:12:39,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 872 [2023-08-30 06:12:39,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 448 flow. Second operand has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:12:39,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:12:39,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 872 [2023-08-30 06:12:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:05,518 INFO L130 PetriNetUnfolder]: 211802/266713 cut-off events. [2023-08-30 06:13:05,518 INFO L131 PetriNetUnfolder]: For 462/462 co-relation queries the response was YES. [2023-08-30 06:13:05,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534570 conditions, 266713 events. 211802/266713 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 16749. Compared 1743453 event pairs, 133947 based on Foata normal form. 5/57509 useless extension candidates. Maximal degree in co-relation 534557. Up to 266498 conditions per place. [2023-08-30 06:13:06,840 INFO L137 encePairwiseOnDemand]: 863/872 looper letters, 124 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2023-08-30 06:13:06,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 849 flow [2023-08-30 06:13:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:13:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:13:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1775 transitions. [2023-08-30 06:13:06,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711009174311924 [2023-08-30 06:13:06,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1775 transitions. [2023-08-30 06:13:06,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1775 transitions. [2023-08-30 06:13:06,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:06,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1775 transitions. [2023-08-30 06:13:06,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:06,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 872.0) internal successors, (5232), 6 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:06,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 872.0) internal successors, (5232), 6 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:06,860 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 448 flow. Second operand 5 states and 1775 transitions. [2023-08-30 06:13:06,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 849 flow [2023-08-30 06:13:06,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 137 transitions, 803 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-30 06:13:06,865 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 474 flow [2023-08-30 06:13:06,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=474, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2023-08-30 06:13:06,866 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2023-08-30 06:13:06,866 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 474 flow [2023-08-30 06:13:06,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:06,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:06,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:13:06,877 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 (5)] Ended with exit code 0 [2023-08-30 06:13:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:07,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:13:07,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1752623611, now seen corresponding path program 1 times [2023-08-30 06:13:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:07,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389527722] [2023-08-30 06:13:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:07,079 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 06:13:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:07,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:07,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:13:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:07,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:13:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:07,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:13:07,191 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:13:07,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:13:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:13:07,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:07,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:07,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389527722] [2023-08-30 06:13:07,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389527722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:07,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:07,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:13:07,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833840606] [2023-08-30 06:13:07,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:07,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:13:07,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:13:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:13:07,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 872 [2023-08-30 06:13:07,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:07,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:07,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 872 [2023-08-30 06:13:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:13:28,581 INFO L130 PetriNetUnfolder]: 174349/219666 cut-off events. [2023-08-30 06:13:28,581 INFO L131 PetriNetUnfolder]: For 417/417 co-relation queries the response was YES. [2023-08-30 06:13:29,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440357 conditions, 219666 events. 174349/219666 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 13363. Compared 1408558 event pairs, 109404 based on Foata normal form. 0/49600 useless extension candidates. Maximal degree in co-relation 440340. Up to 219465 conditions per place. [2023-08-30 06:13:29,993 INFO L137 encePairwiseOnDemand]: 867/872 looper letters, 104 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2023-08-30 06:13:29,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 670 flow [2023-08-30 06:13:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:13:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:13:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1109 transitions. [2023-08-30 06:13:29,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239296636085627 [2023-08-30 06:13:29,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1109 transitions. [2023-08-30 06:13:29,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1109 transitions. [2023-08-30 06:13:29,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:13:29,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1109 transitions. [2023-08-30 06:13:30,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:30,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:30,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 872.0) internal successors, (3488), 4 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:30,006 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 474 flow. Second operand 3 states and 1109 transitions. [2023-08-30 06:13:30,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 670 flow [2023-08-30 06:13:30,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 668 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 06:13:30,010 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 460 flow [2023-08-30 06:13:30,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2023-08-30 06:13:30,011 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -10 predicate places. [2023-08-30 06:13:30,011 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 460 flow [2023-08-30 06:13:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:30,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:13:30,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:13:30,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:13:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:30,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:13:30,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:13:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1752623610, now seen corresponding path program 1 times [2023-08-30 06:13:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:13:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032948740] [2023-08-30 06:13:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:13:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:13:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:13:30,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:13:30,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:13:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:13:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:13:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:13:30,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:13:30,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 06:13:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:13:30,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:13:30,403 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:13:30,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 06:13:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:13:30,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:13:30,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:13:30,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032948740] [2023-08-30 06:13:30,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032948740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:13:30,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:13:30,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:13:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555791843] [2023-08-30 06:13:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:13:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:13:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:13:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:13:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:13:31,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 872 [2023-08-30 06:13:31,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 332.25) internal successors, (1329), 4 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:13:31,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:13:31,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 872 [2023-08-30 06:13:31,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:14:01,213 INFO L130 PetriNetUnfolder]: 241836/304594 cut-off events. [2023-08-30 06:14:01,213 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 06:14:02,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610720 conditions, 304594 events. 241836/304594 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 17237. Compared 1977530 event pairs, 117683 based on Foata normal form. 0/70145 useless extension candidates. Maximal degree in co-relation 610702. Up to 219100 conditions per place. [2023-08-30 06:14:03,222 INFO L137 encePairwiseOnDemand]: 852/872 looper letters, 228 selfloop transitions, 26 changer transitions 0/257 dead transitions. [2023-08-30 06:14:03,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 257 transitions, 1325 flow [2023-08-30 06:14:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:14:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:14:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1547 transitions. [2023-08-30 06:14:03,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44352064220183485 [2023-08-30 06:14:03,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1547 transitions. [2023-08-30 06:14:03,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1547 transitions. [2023-08-30 06:14:03,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:14:03,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1547 transitions. [2023-08-30 06:14:03,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 386.75) internal successors, (1547), 4 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:03,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 872.0) internal successors, (4360), 5 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:03,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 872.0) internal successors, (4360), 5 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:03,235 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 460 flow. Second operand 4 states and 1547 transitions. [2023-08-30 06:14:03,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 257 transitions, 1325 flow [2023-08-30 06:14:03,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 257 transitions, 1319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:14:03,240 INFO L231 Difference]: Finished difference. Result has 104 places, 132 transitions, 653 flow [2023-08-30 06:14:03,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=872, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=653, PETRI_PLACES=104, PETRI_TRANSITIONS=132} [2023-08-30 06:14:03,241 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2023-08-30 06:14:03,242 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 132 transitions, 653 flow [2023-08-30 06:14:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.25) internal successors, (1329), 4 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:14:03,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 06:14:03,253 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 (7)] Ended with exit code 0 [2023-08-30 06:14:03,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:03,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-08-30 06:14:03,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:14:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1590976398, now seen corresponding path program 1 times [2023-08-30 06:14:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:14:03,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850280083] [2023-08-30 06:14:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:14:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:14:03,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:14:03,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:14:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:14:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:14:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:14:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:14:03,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:03,732 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:14:03,732 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 06:14:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:14:03,811 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 20 [2023-08-30 06:14:03,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:14:03,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:14:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:14:03,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:14:03,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:14:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850280083] [2023-08-30 06:14:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850280083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:14:03,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:14:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:14:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258518350] [2023-08-30 06:14:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:14:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:14:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:14:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:14:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:14:04,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 872 [2023-08-30 06:14:04,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 132 transitions, 653 flow. Second operand has 4 states, 4 states have (on average 341.5) internal successors, (1366), 4 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:14:04,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:14:04,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 872 [2023-08-30 06:14:04,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand