./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:02:56,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:02:56,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:02:56,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:02:56,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:02:56,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:02:56,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:02:56,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:02:56,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:02:56,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:02:56,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:02:56,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:02:56,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:02:56,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:02:56,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:02:56,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:02:56,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:02:56,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:02:56,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:02:56,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:02:56,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:02:56,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:02:56,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:02:56,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:02:56,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:02:56,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:02:56,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:02:56,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:02:56,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:02:56,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:02:56,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:02:56,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:02:56,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:02:56,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:02:56,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:02:56,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:02:56,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:02:56,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:02:56,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:02:56,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:02:56,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:02:56,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:02:56,959 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:02:56,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:02:56,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:02:56,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:02:56,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:02:56,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:02:56,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:02:56,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:02:56,962 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:02:56,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:02:56,963 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:02:56,963 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:02:56,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:02:56,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:02:56,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:02:56,964 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:02:56,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:02:56,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:02:56,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:02:56,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:02:56,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:02:56,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:02:56,966 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:02:56,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:02:57,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:02:57,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:02:57,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:02:57,203 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:02:57,204 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:02:57,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 01:02:58,216 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:02:58,360 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:02:58,361 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 01:02:58,366 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02275e928/64f31395fdd145f4b7cd8a694b018ed9/FLAGc86b34a46 [2023-08-30 01:02:58,377 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02275e928/64f31395fdd145f4b7cd8a694b018ed9 [2023-08-30 01:02:58,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:02:58,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:02:58,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:02:58,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:02:58,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:02:58,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:02:58" (1/1) ... [2023-08-30 01:02:58,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd6151a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:02:58, skipping insertion in model container [2023-08-30 01:02:58,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:02:58" (1/1) ... [2023-08-30 01:02:58,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:02:58,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:02:58,530 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 01:02:58,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:02:58,565 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 01:02:58,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a4ee5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:02:58, skipping insertion in model container [2023-08-30 01:02:58,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:02:58,567 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:02:58,568 INFO L158 Benchmark]: Toolchain (without parser) took 185.20ms. Allocated memory is still 71.3MB. Free memory was 48.4MB in the beginning and 38.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 01:02:58,569 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 49.3MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:02:58,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.88ms. Allocated memory is still 71.3MB. Free memory was 48.2MB in the beginning and 38.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 01:02:58,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 71.3MB. Free memory was 49.3MB in the beginning and 49.3MB in the end (delta: 57.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.88ms. Allocated memory is still 71.3MB. Free memory was 48.2MB in the beginning and 38.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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-simple-array-sum.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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 01:03:00,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:03:00,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:03:00,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:03:00,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:03:00,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:03:00,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:03:00,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:03:00,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:03:00,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:03:00,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:03:00,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:03:00,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:03:00,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:03:00,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:03:00,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:03:00,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:03:00,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:03:00,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:03:00,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:03:00,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:03:00,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:03:00,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:03:00,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:03:00,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:03:00,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:03:00,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:03:00,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:03:00,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:03:00,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:03:00,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:03:00,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:03:00,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:03:00,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:03:00,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:03:00,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:03:00,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:03:00,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:03:00,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:03:00,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:03:00,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:03:00,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:03:00,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:03:00,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:03:00,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:03:00,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:03:00,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:03:00,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:03:00,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:03:00,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:03:00,143 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:03:00,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:03:00,143 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:03:00,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:03:00,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:03:00,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:03:00,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:03:00,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:03:00,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:03:00,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:03:00,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:03:00,146 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:03:00,146 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:03:00,147 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:03:00,147 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:03:00,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:03:00,147 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:03:00,147 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:03:00,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:03:00,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:03:00,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:03:00,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:03:00,401 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:03:00,401 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:03:00,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 01:03:01,329 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:03:01,472 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:03:01,472 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-30 01:03:01,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/746db7b04/4f49473b281342c5a8b55f454eeaffa5/FLAGc7319de2c [2023-08-30 01:03:01,485 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/746db7b04/4f49473b281342c5a8b55f454eeaffa5 [2023-08-30 01:03:01,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:03:01,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:03:01,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:03:01,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:03:01,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:03:01,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295d4388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01, skipping insertion in model container [2023-08-30 01:03:01,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:03:01,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:03:01,626 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 01:03:01,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:03:01,651 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:03:01,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:03:01,680 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 01:03:01,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:03:01,691 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:03:01,718 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-simple-array-sum.wvr.c[2690,2703] [2023-08-30 01:03:01,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:03:01,734 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:03:01,734 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 01:03:01,739 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:03:01,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01 WrapperNode [2023-08-30 01:03:01,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:03:01,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:03:01,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:03:01,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:03:01,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,796 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 123 [2023-08-30 01:03:01,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:03:01,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:03:01,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:03:01,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:03:01,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:03:01,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:03:01,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:03:01,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:03:01,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (1/1) ... [2023-08-30 01:03:01,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:03:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:03:01,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:03:01,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:03:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:03:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:03:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:03:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:03:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 01:03:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 01:03:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 01:03:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:03:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:03:01,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:03:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:03:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:03:01,881 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:03:01,999 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:03:02,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:03:02,438 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:03:02,493 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:03:02,493 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 01:03:02,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:03:02 BoogieIcfgContainer [2023-08-30 01:03:02,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:03:02,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:03:02,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:03:02,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:03:02,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:03:01" (1/3) ... [2023-08-30 01:03:02,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599d74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:03:02, skipping insertion in model container [2023-08-30 01:03:02,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:03:01" (2/3) ... [2023-08-30 01:03:02,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599d74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:03:02, skipping insertion in model container [2023-08-30 01:03:02,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:03:02" (3/3) ... [2023-08-30 01:03:02,501 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-08-30 01:03:02,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:03:02,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 01:03:02,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:03:02,608 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 01:03:02,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 426 flow [2023-08-30 01:03:02,727 INFO L130 PetriNetUnfolder]: 16/198 cut-off events. [2023-08-30 01:03:02,727 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:03:02,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 16/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-08-30 01:03:02,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 426 flow [2023-08-30 01:03:02,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 194 transitions, 406 flow [2023-08-30 01:03:02,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:03:02,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 194 transitions, 406 flow [2023-08-30 01:03:02,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 194 transitions, 406 flow [2023-08-30 01:03:02,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 194 transitions, 406 flow [2023-08-30 01:03:02,790 INFO L130 PetriNetUnfolder]: 16/194 cut-off events. [2023-08-30 01:03:02,791 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 01:03:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 16/194 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 148. Up to 3 conditions per place. [2023-08-30 01:03:02,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2023-08-30 01:03:17,676 INFO L134 LiptonReduction]: Checked pairs total: 4560 [2023-08-30 01:03:17,676 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-30 01:03:17,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:03:17,700 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;@43f506b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:03:17,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-30 01:03:17,708 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:03:17,708 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:03:17,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:17,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:03:17,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:17,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash 24254, now seen corresponding path program 1 times [2023-08-30 01:03:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374920897] [2023-08-30 01:03:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:17,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:17,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:17,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 01:03:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:03:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:17,981 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:03:17,982 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 01:03:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:18,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:18,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:18,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374920897] [2023-08-30 01:03:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374920897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:18,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:18,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:03:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687511368] [2023-08-30 01:03:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:18,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:03:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:03:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:03:18,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-08-30 01:03:18,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:18,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:18,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-08-30 01:03:18,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:18,798 INFO L130 PetriNetUnfolder]: 5485/6850 cut-off events. [2023-08-30 01:03:18,799 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-30 01:03:18,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13811 conditions, 6850 events. 5485/6850 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 29507 event pairs, 2611 based on Foata normal form. 0/1898 useless extension candidates. Maximal degree in co-relation 11877. Up to 6809 conditions per place. [2023-08-30 01:03:18,831 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 01:03:18,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 216 flow [2023-08-30 01:03:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-30 01:03:18,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-08-30 01:03:18,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-30 01:03:18,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-30 01:03:18,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:18,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-30 01:03:18,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:18,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:18,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:18,866 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 558 transitions. [2023-08-30 01:03:18,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 216 flow [2023-08-30 01:03:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 01:03:18,874 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-08-30 01:03:18,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-30 01:03:18,877 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2023-08-30 01:03:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-08-30 01:03:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:03:18,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:19,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:19,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:19,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 24255, now seen corresponding path program 1 times [2023-08-30 01:03:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:19,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848384381] [2023-08-30 01:03:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:19,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:19,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 01:03:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:03:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:19,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:03:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:03:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:19,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:19,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:19,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848384381] [2023-08-30 01:03:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848384381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:19,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:19,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:03:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229904229] [2023-08-30 01:03:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:03:19,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:03:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:03:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 400 [2023-08-30 01:03:19,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:19,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:19,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 400 [2023-08-30 01:03:19,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:20,497 INFO L130 PetriNetUnfolder]: 10969/13697 cut-off events. [2023-08-30 01:03:20,497 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 01:03:20,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27408 conditions, 13697 events. 10969/13697 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 63988 event pairs, 5222 based on Foata normal form. 0/3705 useless extension candidates. Maximal degree in co-relation 27402. Up to 6810 conditions per place. [2023-08-30 01:03:20,547 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 89 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 01:03:20,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 96 transitions, 392 flow [2023-08-30 01:03:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-08-30 01:03:20,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2023-08-30 01:03:20,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-08-30 01:03:20,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-08-30 01:03:20,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:20,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-08-30 01:03:20,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:20,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:20,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:20,554 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 3 states and 602 transitions. [2023-08-30 01:03:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 96 transitions, 392 flow [2023-08-30 01:03:20,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 96 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:20,556 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 141 flow [2023-08-30 01:03:20,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-08-30 01:03:20,557 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 01:03:20,557 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 141 flow [2023-08-30 01:03:20,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:20,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:20,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:03:20,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:20,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:20,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 754150, now seen corresponding path program 1 times [2023-08-30 01:03:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110893238] [2023-08-30 01:03:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:20,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:20,768 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:20,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 01:03:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:03:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:20,907 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:03:20,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:03:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:20,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:03:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:21,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110893238] [2023-08-30 01:03:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110893238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:03:21,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:03:21,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:03:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072552965] [2023-08-30 01:03:21,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:03:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:03:21,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:03:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:03:22,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 400 [2023-08-30 01:03:22,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:22,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:22,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 400 [2023-08-30 01:03:22,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:24,178 INFO L130 PetriNetUnfolder]: 16461/20556 cut-off events. [2023-08-30 01:03:24,178 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 01:03:24,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41157 conditions, 20556 events. 16461/20556 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 99971 event pairs, 7833 based on Foata normal form. 0/5631 useless extension candidates. Maximal degree in co-relation 41148. Up to 6811 conditions per place. [2023-08-30 01:03:24,317 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 131 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2023-08-30 01:03:24,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 153 transitions, 675 flow [2023-08-30 01:03:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:03:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:03:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1110 transitions. [2023-08-30 01:03:24,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-08-30 01:03:24,325 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1110 transitions. [2023-08-30 01:03:24,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1110 transitions. [2023-08-30 01:03:24,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:24,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1110 transitions. [2023-08-30 01:03:24,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:24,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:24,335 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:24,337 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 141 flow. Second operand 6 states and 1110 transitions. [2023-08-30 01:03:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 153 transitions, 675 flow [2023-08-30 01:03:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 153 transitions, 661 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:03:24,342 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 278 flow [2023-08-30 01:03:24,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-30 01:03:24,343 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 01:03:24,343 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 278 flow [2023-08-30 01:03:24,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:24,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:03:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:24,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:24,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:24,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 754615, now seen corresponding path program 1 times [2023-08-30 01:03:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640797713] [2023-08-30 01:03:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:24,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:24,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 01:03:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:03:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:24,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:24,688 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 01:03:24,688 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 01:03:24,961 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 01:03:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 01:03:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:25,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:25,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:25,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640797713] [2023-08-30 01:03:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640797713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:25,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:03:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412146155] [2023-08-30 01:03:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:25,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:03:25,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:03:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:03:25,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-30 01:03:25,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:25,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:25,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-30 01:03:25,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:26,241 INFO L130 PetriNetUnfolder]: 12922/16294 cut-off events. [2023-08-30 01:03:26,242 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 01:03:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32681 conditions, 16294 events. 12922/16294 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 79702 event pairs, 6132 based on Foata normal form. 0/4579 useless extension candidates. Maximal degree in co-relation 32668. Up to 16171 conditions per place. [2023-08-30 01:03:26,301 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 61 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-30 01:03:26,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 382 flow [2023-08-30 01:03:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-30 01:03:26,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-08-30 01:03:26,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-30 01:03:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-30 01:03:26,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:26,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-30 01:03:26,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:26,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:26,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:26,308 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 278 flow. Second operand 3 states and 564 transitions. [2023-08-30 01:03:26,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 382 flow [2023-08-30 01:03:26,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 363 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:26,310 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 241 flow [2023-08-30 01:03:26,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-30 01:03:26,312 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-30 01:03:26,312 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 241 flow [2023-08-30 01:03:26,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:26,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:26,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:03:26,321 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 01:03:26,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:26,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:26,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 754613, now seen corresponding path program 1 times [2023-08-30 01:03:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956283291] [2023-08-30 01:03:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:26,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:26,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 01:03:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:03:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:26,655 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 01:03:26,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 01:03:26,670 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 01:03:26,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 01:03:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:26,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:03:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:26,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:26,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:26,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956283291] [2023-08-30 01:03:26,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956283291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:26,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:26,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:03:26,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546751983] [2023-08-30 01:03:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:03:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:03:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:03:26,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-08-30 01:03:26,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:26,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:26,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-08-30 01:03:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:27,752 INFO L130 PetriNetUnfolder]: 9383/12032 cut-off events. [2023-08-30 01:03:27,752 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 01:03:27,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24138 conditions, 12032 events. 9383/12032 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 59505 event pairs, 4431 based on Foata normal form. 0/3766 useless extension candidates. Maximal degree in co-relation 24124. Up to 11909 conditions per place. [2023-08-30 01:03:27,788 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 57 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-30 01:03:27,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 337 flow [2023-08-30 01:03:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-30 01:03:27,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-08-30 01:03:27,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-30 01:03:27,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-30 01:03:27,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:27,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-30 01:03:27,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:27,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:27,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:27,794 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 241 flow. Second operand 3 states and 565 transitions. [2023-08-30 01:03:27,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 337 flow [2023-08-30 01:03:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:27,796 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 222 flow [2023-08-30 01:03:27,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-30 01:03:27,797 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2023-08-30 01:03:27,797 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 222 flow [2023-08-30 01:03:27,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:27,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:27,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:03:27,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:28,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:28,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:28,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 725200990, now seen corresponding path program 1 times [2023-08-30 01:03:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175360373] [2023-08-30 01:03:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:28,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:28,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 01:03:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 01:03:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:28,133 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 01:03:28,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 01:03:28,318 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-08-30 01:03:28,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 01:03:28,411 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 01:03:28,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:28,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175360373] [2023-08-30 01:03:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175360373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:28,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:28,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:03:28,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763900901] [2023-08-30 01:03:28,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:03:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:28,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:03:28,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:03:28,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-30 01:03:28,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:28,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:28,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-30 01:03:28,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:29,265 INFO L130 PetriNetUnfolder]: 8864/11354 cut-off events. [2023-08-30 01:03:29,266 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 01:03:29,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22783 conditions, 11354 events. 8864/11354 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 55579 event pairs, 4176 based on Foata normal form. 0/3634 useless extension candidates. Maximal degree in co-relation 22768. Up to 11231 conditions per place. [2023-08-30 01:03:29,295 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 55 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 01:03:29,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 330 flow [2023-08-30 01:03:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 01:03:29,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 01:03:29,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 01:03:29,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 01:03:29,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:29,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 01:03:29,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:29,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:29,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:29,302 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 222 flow. Second operand 3 states and 560 transitions. [2023-08-30 01:03:29,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 330 flow [2023-08-30 01:03:29,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:29,304 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 219 flow [2023-08-30 01:03:29,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-30 01:03:29,306 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 0 predicate places. [2023-08-30 01:03:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 219 flow [2023-08-30 01:03:29,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:29,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:03:29,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:29,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:29,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:29,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash 725200988, now seen corresponding path program 1 times [2023-08-30 01:03:29,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:29,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99321200] [2023-08-30 01:03:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:29,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:29,515 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:29,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 01:03:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:03:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:29,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:29,645 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 01:03:29,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 01:03:29,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 01:03:29,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:29,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:03:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:29,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:29,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99321200] [2023-08-30 01:03:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99321200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:29,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:03:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860943739] [2023-08-30 01:03:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:03:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:03:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:03:29,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-08-30 01:03:29,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:29,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:29,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-08-30 01:03:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:30,505 INFO L130 PetriNetUnfolder]: 8345/10676 cut-off events. [2023-08-30 01:03:30,505 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 01:03:30,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 10676 events. 8345/10676 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 51694 event pairs, 3921 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 21412. Up to 10553 conditions per place. [2023-08-30 01:03:30,542 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 53 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-30 01:03:30,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 323 flow [2023-08-30 01:03:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-30 01:03:30,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2023-08-30 01:03:30,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-30 01:03:30,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-30 01:03:30,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:30,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-30 01:03:30,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:30,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:30,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:30,547 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 219 flow. Second operand 3 states and 561 transitions. [2023-08-30 01:03:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 323 flow [2023-08-30 01:03:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:30,549 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 216 flow [2023-08-30 01:03:30,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-08-30 01:03:30,550 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-08-30 01:03:30,551 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 216 flow [2023-08-30 01:03:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:30,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:30,551 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:03:30,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:30,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:30,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:30,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash 994275455, now seen corresponding path program 2 times [2023-08-30 01:03:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:30,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593650045] [2023-08-30 01:03:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:03:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:30,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 01:03:30,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:03:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:03:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:03:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:30,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:03:30,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:03:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:31,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:03:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:31,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593650045] [2023-08-30 01:03:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593650045] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:03:31,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:03:31,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:03:31,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017391845] [2023-08-30 01:03:31,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:03:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:03:31,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:03:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:03:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-08-30 01:03:34,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:34,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:34,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-08-30 01:03:34,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:36,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:38,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:40,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:41,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:43,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:45,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 01:03:50,752 INFO L130 PetriNetUnfolder]: 27803/35557 cut-off events. [2023-08-30 01:03:50,753 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-08-30 01:03:50,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71274 conditions, 35557 events. 27803/35557 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 188279 event pairs, 13070 based on Foata normal form. 12/12102 useless extension candidates. Maximal degree in co-relation 71257. Up to 3523 conditions per place. [2023-08-30 01:03:50,914 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 345 selfloop transitions, 32 changer transitions 0/380 dead transitions. [2023-08-30 01:03:50,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 380 transitions, 1774 flow [2023-08-30 01:03:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:03:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:03:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2321 transitions. [2023-08-30 01:03:50,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48354166666666665 [2023-08-30 01:03:50,937 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2321 transitions. [2023-08-30 01:03:50,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2321 transitions. [2023-08-30 01:03:50,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:50,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2321 transitions. [2023-08-30 01:03:50,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 193.41666666666666) internal successors, (2321), 12 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:50,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:50,954 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:50,954 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 216 flow. Second operand 12 states and 2321 transitions. [2023-08-30 01:03:50,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 380 transitions, 1774 flow [2023-08-30 01:03:50,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 380 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:50,960 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 459 flow [2023-08-30 01:03:50,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-30 01:03:50,962 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-30 01:03:50,962 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 459 flow [2023-08-30 01:03:50,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 162.0) internal successors, (1944), 12 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:50,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:50,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:03:50,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:51,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:51,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:51,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1006388151, now seen corresponding path program 1 times [2023-08-30 01:03:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369589803] [2023-08-30 01:03:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:51,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:51,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 01:03:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:03:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:51,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:51,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:51,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369589803] [2023-08-30 01:03:51,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369589803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:51,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:51,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:03:51,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546766242] [2023-08-30 01:03:51,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:51,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:03:51,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:03:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:03:51,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-08-30 01:03:51,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:51,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:51,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-08-30 01:03:51,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:53,538 INFO L130 PetriNetUnfolder]: 23353/30848 cut-off events. [2023-08-30 01:03:53,538 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-30 01:03:53,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61961 conditions, 30848 events. 23353/30848 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 175424 event pairs, 11908 based on Foata normal form. 1/11872 useless extension candidates. Maximal degree in co-relation 61936. Up to 28376 conditions per place. [2023-08-30 01:03:53,688 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 111 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2023-08-30 01:03:53,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 835 flow [2023-08-30 01:03:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:03:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:03:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 936 transitions. [2023-08-30 01:03:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468 [2023-08-30 01:03:53,690 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 936 transitions. [2023-08-30 01:03:53,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 936 transitions. [2023-08-30 01:03:53,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:53,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 936 transitions. [2023-08-30 01:03:53,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.2) internal successors, (936), 5 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:53,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:53,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:53,695 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 459 flow. Second operand 5 states and 936 transitions. [2023-08-30 01:03:53,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 835 flow [2023-08-30 01:03:53,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 129 transitions, 776 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 01:03:53,698 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 469 flow [2023-08-30 01:03:53,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-30 01:03:53,699 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 19 predicate places. [2023-08-30 01:03:53,699 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 469 flow [2023-08-30 01:03:53,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:53,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:53,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:03:53,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:53,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:53,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:53,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465548, now seen corresponding path program 1 times [2023-08-30 01:03:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307961574] [2023-08-30 01:03:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:53,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:53,908 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:53,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 01:03:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:03:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:54,036 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 01:03:54,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 01:03:54,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 01:03:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:03:54,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 01:03:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:54,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:54,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:54,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307961574] [2023-08-30 01:03:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307961574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:54,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:03:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667953246] [2023-08-30 01:03:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:03:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:03:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:03:54,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 400 [2023-08-30 01:03:54,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:54,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:54,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 400 [2023-08-30 01:03:54,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:56,742 INFO L130 PetriNetUnfolder]: 25566/32496 cut-off events. [2023-08-30 01:03:56,742 INFO L131 PetriNetUnfolder]: For 1848/1961 co-relation queries the response was YES. [2023-08-30 01:03:56,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71645 conditions, 32496 events. 25566/32496 cut-off events. For 1848/1961 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 170616 event pairs, 11840 based on Foata normal form. 113/13279 useless extension candidates. Maximal degree in co-relation 71616. Up to 32182 conditions per place. [2023-08-30 01:03:56,895 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 01:03:56,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 609 flow [2023-08-30 01:03:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-30 01:03:56,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608333333333333 [2023-08-30 01:03:56,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-30 01:03:56,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-30 01:03:56,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:56,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-30 01:03:56,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:56,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:56,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:56,902 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 469 flow. Second operand 3 states and 553 transitions. [2023-08-30 01:03:56,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 609 flow [2023-08-30 01:03:56,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 577 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 01:03:56,912 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 435 flow [2023-08-30 01:03:56,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-30 01:03:56,914 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2023-08-30 01:03:56,914 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 435 flow [2023-08-30 01:03:56,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:56,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:56,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:03:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:57,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:57,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1133465547, now seen corresponding path program 1 times [2023-08-30 01:03:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468523371] [2023-08-30 01:03:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:57,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:57,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:57,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 01:03:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:03:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:57,227 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 01:03:57,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 01:03:57,252 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 01:03:57,252 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 01:03:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:03:57,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:03:57,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:03:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468523371] [2023-08-30 01:03:57,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468523371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:03:57,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:03:57,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:03:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520697433] [2023-08-30 01:03:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:03:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:03:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:03:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:03:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:03:57,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 400 [2023-08-30 01:03:57,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:57,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:03:57,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 400 [2023-08-30 01:03:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:03:59,373 INFO L130 PetriNetUnfolder]: 23669/30163 cut-off events. [2023-08-30 01:03:59,376 INFO L131 PetriNetUnfolder]: For 1998/2103 co-relation queries the response was YES. [2023-08-30 01:03:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66280 conditions, 30163 events. 23669/30163 cut-off events. For 1998/2103 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 157652 event pairs, 11077 based on Foata normal form. 105/12572 useless extension candidates. Maximal degree in co-relation 66251. Up to 29786 conditions per place. [2023-08-30 01:03:59,492 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 69 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 01:03:59,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 571 flow [2023-08-30 01:03:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:03:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:03:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 01:03:59,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-08-30 01:03:59,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 01:03:59,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 01:03:59,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:03:59,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 01:03:59,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:59,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:59,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:59,496 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 435 flow. Second operand 3 states and 548 transitions. [2023-08-30 01:03:59,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 571 flow [2023-08-30 01:03:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:03:59,503 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 432 flow [2023-08-30 01:03:59,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-30 01:03:59,504 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-30 01:03:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 432 flow [2023-08-30 01:03:59,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:03:59,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:03:59,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:03:59,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:03:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:59,717 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:03:59,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:03:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701959, now seen corresponding path program 1 times [2023-08-30 01:03:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:03:59,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055068368] [2023-08-30 01:03:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:03:59,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:03:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:03:59,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:03:59,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 01:03:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:03:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 01:03:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:03:59,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:03:59,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:03:59,951 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 01:03:59,951 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 16 treesize of output 18 [2023-08-30 01:04:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:00,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:00,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055068368] [2023-08-30 01:04:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055068368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:00,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 01:04:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728316663] [2023-08-30 01:04:00,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:04:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:04:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:04:02,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 400 [2023-08-30 01:04:02,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:02,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:02,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 400 [2023-08-30 01:04:02,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:13,988 INFO L130 PetriNetUnfolder]: 89609/116410 cut-off events. [2023-08-30 01:04:13,989 INFO L131 PetriNetUnfolder]: For 6779/6779 co-relation queries the response was YES. [2023-08-30 01:04:14,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249596 conditions, 116410 events. 89609/116410 cut-off events. For 6779/6779 co-relation queries the response was YES. Maximal size of possible extension queue 5170. Compared 741944 event pairs, 31818 based on Foata normal form. 116/50497 useless extension candidates. Maximal degree in co-relation 249566. Up to 17191 conditions per place. [2023-08-30 01:04:14,806 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 477 selfloop transitions, 52 changer transitions 0/531 dead transitions. [2023-08-30 01:04:14,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 531 transitions, 2797 flow [2023-08-30 01:04:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 01:04:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 01:04:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4279 transitions. [2023-08-30 01:04:14,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279 [2023-08-30 01:04:14,814 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4279 transitions. [2023-08-30 01:04:14,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4279 transitions. [2023-08-30 01:04:14,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:14,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4279 transitions. [2023-08-30 01:04:14,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.16) internal successors, (4279), 25 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:14,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:14,843 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:14,843 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 432 flow. Second operand 25 states and 4279 transitions. [2023-08-30 01:04:14,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 531 transitions, 2797 flow [2023-08-30 01:04:14,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 531 transitions, 2796 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:04:14,901 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 784 flow [2023-08-30 01:04:14,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=784, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-08-30 01:04:14,902 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-30 01:04:14,902 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 784 flow [2023-08-30 01:04:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.6) internal successors, (1526), 10 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:14,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:14,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:14,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:15,111 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:15,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1881701960, now seen corresponding path program 1 times [2023-08-30 01:04:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:15,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486115616] [2023-08-30 01:04:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:15,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:15,113 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:15,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 01:04:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:04:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:15,254 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:04:15,254 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 01:04:15,283 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 01:04:15,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 01:04:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:04:15,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:15,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486115616] [2023-08-30 01:04:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486115616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:15,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:04:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495981832] [2023-08-30 01:04:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:04:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:04:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:04:15,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 400 [2023-08-30 01:04:15,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 784 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:15,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:15,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 400 [2023-08-30 01:04:15,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:21,457 INFO L130 PetriNetUnfolder]: 57139/74345 cut-off events. [2023-08-30 01:04:21,457 INFO L131 PetriNetUnfolder]: For 114375/116288 co-relation queries the response was YES. [2023-08-30 01:04:21,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207143 conditions, 74345 events. 57139/74345 cut-off events. For 114375/116288 co-relation queries the response was YES. Maximal size of possible extension queue 3265. Compared 458097 event pairs, 28990 based on Foata normal form. 6962/41716 useless extension candidates. Maximal degree in co-relation 207104. Up to 73604 conditions per place. [2023-08-30 01:04:22,061 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 78 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2023-08-30 01:04:22,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 958 flow [2023-08-30 01:04:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:04:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:04:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2023-08-30 01:04:22,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2023-08-30 01:04:22,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2023-08-30 01:04:22,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2023-08-30 01:04:22,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:22,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2023-08-30 01:04:22,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:22,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:22,067 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:22,067 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 784 flow. Second operand 4 states and 692 transitions. [2023-08-30 01:04:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 958 flow [2023-08-30 01:04:22,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 859 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-08-30 01:04:22,326 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 703 flow [2023-08-30 01:04:22,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=703, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2023-08-30 01:04:22,326 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 44 predicate places. [2023-08-30 01:04:22,327 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 703 flow [2023-08-30 01:04:22,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:22,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:22,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:22,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-08-30 01:04:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:22,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:22,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 777687685, now seen corresponding path program 1 times [2023-08-30 01:04:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207158366] [2023-08-30 01:04:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:22,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:22,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:22,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 01:04:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:04:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:22,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 01:04:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:04:22,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:22,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207158366] [2023-08-30 01:04:22,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207158366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:22,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:22,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:04:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735843750] [2023-08-30 01:04:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:04:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:04:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:04:22,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-08-30 01:04:22,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 703 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:22,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:22,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-08-30 01:04:22,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:26,983 INFO L130 PetriNetUnfolder]: 40412/53146 cut-off events. [2023-08-30 01:04:26,983 INFO L131 PetriNetUnfolder]: For 70336/71657 co-relation queries the response was YES. [2023-08-30 01:04:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147945 conditions, 53146 events. 40412/53146 cut-off events. For 70336/71657 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 321262 event pairs, 20327 based on Foata normal form. 1321/28653 useless extension candidates. Maximal degree in co-relation 147907. Up to 52458 conditions per place. [2023-08-30 01:04:27,388 INFO L137 encePairwiseOnDemand]: 396/400 looper letters, 76 selfloop transitions, 12 changer transitions 0/100 dead transitions. [2023-08-30 01:04:27,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 875 flow [2023-08-30 01:04:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:04:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:04:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 698 transitions. [2023-08-30 01:04:27,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625 [2023-08-30 01:04:27,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 698 transitions. [2023-08-30 01:04:27,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 698 transitions. [2023-08-30 01:04:27,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:27,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 698 transitions. [2023-08-30 01:04:27,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:27,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:27,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:27,395 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 703 flow. Second operand 4 states and 698 transitions. [2023-08-30 01:04:27,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 875 flow [2023-08-30 01:04:27,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 862 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:04:27,583 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 710 flow [2023-08-30 01:04:27,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=710, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2023-08-30 01:04:27,583 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2023-08-30 01:04:27,583 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 710 flow [2023-08-30 01:04:27,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:27,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:27,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:27,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:27,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:27,790 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:27,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 777687684, now seen corresponding path program 1 times [2023-08-30 01:04:27,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:27,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312228417] [2023-08-30 01:04:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:27,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:27,792 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:27,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 01:04:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:04:27,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:27,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312228417] [2023-08-30 01:04:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312228417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:04:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205055817] [2023-08-30 01:04:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 01:04:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 01:04:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:04:28,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 400 [2023-08-30 01:04:28,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:28,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:28,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 400 [2023-08-30 01:04:28,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:31,748 INFO L130 PetriNetUnfolder]: 35866/48498 cut-off events. [2023-08-30 01:04:31,748 INFO L131 PetriNetUnfolder]: For 87894/89260 co-relation queries the response was YES. [2023-08-30 01:04:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140550 conditions, 48498 events. 35866/48498 cut-off events. For 87894/89260 co-relation queries the response was YES. Maximal size of possible extension queue 2255. Compared 310773 event pairs, 20671 based on Foata normal form. 1366/29721 useless extension candidates. Maximal degree in co-relation 140512. Up to 47843 conditions per place. [2023-08-30 01:04:32,155 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 103 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2023-08-30 01:04:32,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 132 transitions, 1036 flow [2023-08-30 01:04:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:04:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:04:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2023-08-30 01:04:32,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535 [2023-08-30 01:04:32,157 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2023-08-30 01:04:32,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2023-08-30 01:04:32,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:32,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2023-08-30 01:04:32,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:32,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:32,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:32,161 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 710 flow. Second operand 5 states and 907 transitions. [2023-08-30 01:04:32,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 132 transitions, 1036 flow [2023-08-30 01:04:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:04:32,371 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 747 flow [2023-08-30 01:04:32,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=747, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-08-30 01:04:32,371 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2023-08-30 01:04:32,371 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 747 flow [2023-08-30 01:04:32,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:32,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:32,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:32,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:32,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:32,572 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:32,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1796786889, now seen corresponding path program 1 times [2023-08-30 01:04:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:32,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867231504] [2023-08-30 01:04:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:32,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:32,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:32,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 01:04:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:04:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:32,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:32,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867231504] [2023-08-30 01:04:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867231504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:32,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:04:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93019412] [2023-08-30 01:04:32,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:04:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:04:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:04:33,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-08-30 01:04:33,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 747 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:33,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:33,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-08-30 01:04:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:37,792 INFO L130 PetriNetUnfolder]: 28811/37807 cut-off events. [2023-08-30 01:04:37,793 INFO L131 PetriNetUnfolder]: For 38953/38995 co-relation queries the response was YES. [2023-08-30 01:04:37,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106477 conditions, 37807 events. 28811/37807 cut-off events. For 38953/38995 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 223951 event pairs, 7300 based on Foata normal form. 413/23006 useless extension candidates. Maximal degree in co-relation 106437. Up to 17496 conditions per place. [2023-08-30 01:04:38,042 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 161 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2023-08-30 01:04:38,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 1389 flow [2023-08-30 01:04:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 01:04:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 01:04:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2429 transitions. [2023-08-30 01:04:38,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43375 [2023-08-30 01:04:38,046 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2429 transitions. [2023-08-30 01:04:38,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2429 transitions. [2023-08-30 01:04:38,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:38,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2429 transitions. [2023-08-30 01:04:38,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.5) internal successors, (2429), 14 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:38,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:38,054 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:38,054 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 747 flow. Second operand 14 states and 2429 transitions. [2023-08-30 01:04:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 1389 flow [2023-08-30 01:04:38,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 204 transitions, 1339 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 01:04:38,275 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 788 flow [2023-08-30 01:04:38,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=788, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2023-08-30 01:04:38,275 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 54 predicate places. [2023-08-30 01:04:38,275 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 788 flow [2023-08-30 01:04:38,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:38,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:38,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:38,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:38,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:38,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:38,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 39721626, now seen corresponding path program 1 times [2023-08-30 01:04:38,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:38,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472261124] [2023-08-30 01:04:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:38,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:38,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:38,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:04:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:04:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:38,571 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 01:04:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:04:38,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:04:38,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472261124] [2023-08-30 01:04:38,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472261124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:04:38,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:04:38,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 01:04:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016289389] [2023-08-30 01:04:38,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:04:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:04:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:04:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:04:38,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 400 [2023-08-30 01:04:38,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:38,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:38,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 400 [2023-08-30 01:04:38,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:43,329 INFO L130 PetriNetUnfolder]: 37222/49575 cut-off events. [2023-08-30 01:04:43,329 INFO L131 PetriNetUnfolder]: For 154831/157414 co-relation queries the response was YES. [2023-08-30 01:04:43,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156953 conditions, 49575 events. 37222/49575 cut-off events. For 154831/157414 co-relation queries the response was YES. Maximal size of possible extension queue 2179. Compared 311965 event pairs, 13910 based on Foata normal form. 2583/37600 useless extension candidates. Maximal degree in co-relation 156911. Up to 31913 conditions per place. [2023-08-30 01:04:43,796 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 98 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-08-30 01:04:43,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 1139 flow [2023-08-30 01:04:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:04:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:04:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 878 transitions. [2023-08-30 01:04:43,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439 [2023-08-30 01:04:43,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 878 transitions. [2023-08-30 01:04:43,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 878 transitions. [2023-08-30 01:04:43,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:43,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 878 transitions. [2023-08-30 01:04:43,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:43,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:43,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:43,802 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 788 flow. Second operand 5 states and 878 transitions. [2023-08-30 01:04:43,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 1139 flow [2023-08-30 01:04:43,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 121 transitions, 1097 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 01:04:43,979 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 784 flow [2023-08-30 01:04:43,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-08-30 01:04:43,980 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 55 predicate places. [2023-08-30 01:04:43,980 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 784 flow [2023-08-30 01:04:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:43,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:43,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:43,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:44,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:44,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:44,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:44,186 INFO L85 PathProgramCache]: Analyzing trace with hash -128035769, now seen corresponding path program 1 times [2023-08-30 01:04:44,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643111575] [2023-08-30 01:04:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:44,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:44,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:44,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:44,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 01:04:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:04:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:44,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:44,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-30 01:04:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:44,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:44,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643111575] [2023-08-30 01:04:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643111575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:44,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 01:04:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275607720] [2023-08-30 01:04:44,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:44,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:04:44,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:04:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:04:46,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 400 [2023-08-30 01:04:46,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 784 flow. Second operand has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:46,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:04:46,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 400 [2023-08-30 01:04:46,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:04:53,432 INFO L130 PetriNetUnfolder]: 56517/77092 cut-off events. [2023-08-30 01:04:53,432 INFO L131 PetriNetUnfolder]: For 281587/287932 co-relation queries the response was YES. [2023-08-30 01:04:53,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250410 conditions, 77092 events. 56517/77092 cut-off events. For 281587/287932 co-relation queries the response was YES. Maximal size of possible extension queue 3139. Compared 530524 event pairs, 18038 based on Foata normal form. 6345/64324 useless extension candidates. Maximal degree in co-relation 250367. Up to 33770 conditions per place. [2023-08-30 01:04:54,079 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 177 selfloop transitions, 35 changer transitions 0/221 dead transitions. [2023-08-30 01:04:54,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 221 transitions, 1713 flow [2023-08-30 01:04:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 01:04:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 01:04:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1928 transitions. [2023-08-30 01:04:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381818181818182 [2023-08-30 01:04:54,081 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1928 transitions. [2023-08-30 01:04:54,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1928 transitions. [2023-08-30 01:04:54,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:04:54,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1928 transitions. [2023-08-30 01:04:54,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 175.27272727272728) internal successors, (1928), 11 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:54,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:54,087 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:54,087 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 784 flow. Second operand 11 states and 1928 transitions. [2023-08-30 01:04:54,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 221 transitions, 1713 flow [2023-08-30 01:04:54,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 221 transitions, 1677 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 01:04:54,343 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 898 flow [2023-08-30 01:04:54,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=898, PETRI_PLACES=125, PETRI_TRANSITIONS=103} [2023-08-30 01:04:54,344 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2023-08-30 01:04:54,344 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 898 flow [2023-08-30 01:04:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.8) internal successors, (1628), 10 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:04:54,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:04:54,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:04:54,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 01:04:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:54,552 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:04:54,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:04:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash -128035771, now seen corresponding path program 1 times [2023-08-30 01:04:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:04:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696951337] [2023-08-30 01:04:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:04:54,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:04:54,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:04:54,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:04:54,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 01:04:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:04:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 01:04:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:04:54,743 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:04:54,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:04:54,812 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 01:04:54,812 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 01:04:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:04:54,886 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 01:04:54,892 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 01:04:54,892 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 01:04:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:54,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:04:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:04:57,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:04:57,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696951337] [2023-08-30 01:04:57,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696951337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:04:57,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:04:57,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 01:04:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27539835] [2023-08-30 01:04:57,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:04:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:04:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:04:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:04:57,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:05:01,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 400 [2023-08-30 01:05:01,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 103 transitions, 898 flow. Second operand has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:01,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:01,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 400 [2023-08-30 01:05:01,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:13,361 INFO L130 PetriNetUnfolder]: 53477/72936 cut-off events. [2023-08-30 01:05:13,361 INFO L131 PetriNetUnfolder]: For 300318/306151 co-relation queries the response was YES. [2023-08-30 01:05:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255994 conditions, 72936 events. 53477/72936 cut-off events. For 300318/306151 co-relation queries the response was YES. Maximal size of possible extension queue 2954. Compared 493425 event pairs, 19004 based on Foata normal form. 6949/67129 useless extension candidates. Maximal degree in co-relation 255946. Up to 15925 conditions per place. [2023-08-30 01:05:14,079 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 349 selfloop transitions, 68 changer transitions 0/426 dead transitions. [2023-08-30 01:05:14,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 426 transitions, 3048 flow [2023-08-30 01:05:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 01:05:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 01:05:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3792 transitions. [2023-08-30 01:05:14,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121739130434783 [2023-08-30 01:05:14,083 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3792 transitions. [2023-08-30 01:05:14,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3792 transitions. [2023-08-30 01:05:14,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:14,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3792 transitions. [2023-08-30 01:05:14,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 164.8695652173913) internal successors, (3792), 23 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:14,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:14,093 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 400.0) internal successors, (9600), 24 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:14,093 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 898 flow. Second operand 23 states and 3792 transitions. [2023-08-30 01:05:14,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 426 transitions, 3048 flow [2023-08-30 01:05:14,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 426 transitions, 3007 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 01:05:14,390 INFO L231 Difference]: Finished difference. Result has 153 places, 131 transitions, 1269 flow [2023-08-30 01:05:14,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1269, PETRI_PLACES=153, PETRI_TRANSITIONS=131} [2023-08-30 01:05:14,391 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 95 predicate places. [2023-08-30 01:05:14,391 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 131 transitions, 1269 flow [2023-08-30 01:05:14,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:14,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:14,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:14,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:14,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:14,595 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:05:14,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -691425590, now seen corresponding path program 2 times [2023-08-30 01:05:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:14,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756470945] [2023-08-30 01:05:14,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:05:14,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:14,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:05:14,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 01:05:14,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:05:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:05:14,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 01:05:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:14,774 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 01:05:14,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 01:05:14,830 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-08-30 01:05:14,830 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 21 treesize of output 21 [2023-08-30 01:05:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:05:14,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 01:05:15,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756470945] [2023-08-30 01:05:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756470945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:15,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 01:05:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072556414] [2023-08-30 01:05:15,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 01:05:15,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 01:05:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 01:05:19,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 400 [2023-08-30 01:05:19,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 131 transitions, 1269 flow. Second operand has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:19,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:19,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 400 [2023-08-30 01:05:19,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:05:36,433 INFO L130 PetriNetUnfolder]: 81023/112074 cut-off events. [2023-08-30 01:05:36,433 INFO L131 PetriNetUnfolder]: For 445327/457021 co-relation queries the response was YES. [2023-08-30 01:05:37,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413503 conditions, 112074 events. 81023/112074 cut-off events. For 445327/457021 co-relation queries the response was YES. Maximal size of possible extension queue 4309. Compared 805526 event pairs, 23700 based on Foata normal form. 15566/107102 useless extension candidates. Maximal degree in co-relation 413447. Up to 46410 conditions per place. [2023-08-30 01:05:37,877 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 313 selfloop transitions, 31 changer transitions 0/352 dead transitions. [2023-08-30 01:05:37,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 352 transitions, 3099 flow [2023-08-30 01:05:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 01:05:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 01:05:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2239 transitions. [2023-08-30 01:05:37,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305769230769231 [2023-08-30 01:05:37,881 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2239 transitions. [2023-08-30 01:05:37,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2239 transitions. [2023-08-30 01:05:37,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:05:37,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2239 transitions. [2023-08-30 01:05:37,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.23076923076923) internal successors, (2239), 13 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:37,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:37,886 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:37,886 INFO L175 Difference]: Start difference. First operand has 153 places, 131 transitions, 1269 flow. Second operand 13 states and 2239 transitions. [2023-08-30 01:05:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 352 transitions, 3099 flow [2023-08-30 01:05:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 352 transitions, 2970 flow, removed 42 selfloop flow, removed 7 redundant places. [2023-08-30 01:05:39,451 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1325 flow [2023-08-30 01:05:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1325, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2023-08-30 01:05:39,452 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2023-08-30 01:05:39,452 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1325 flow [2023-08-30 01:05:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.42857142857142) internal successors, (2190), 14 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:39,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:05:39,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:05:39,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 01:05:39,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:39,660 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:05:39,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:05:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699634, now seen corresponding path program 1 times [2023-08-30 01:05:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:05:39,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999118016] [2023-08-30 01:05:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:05:39,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:05:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:05:39,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:05:39,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 01:05:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:05:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 01:05:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:05:39,783 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 01:05:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:05:39,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:05:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:05:40,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:05:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999118016] [2023-08-30 01:05:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999118016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:05:40,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:05:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-30 01:05:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411996717] [2023-08-30 01:05:40,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:05:40,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 01:05:40,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:05:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 01:05:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 01:05:43,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 400 [2023-08-30 01:05:43,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1325 flow. Second operand has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:05:43,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:05:43,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 400 [2023-08-30 01:05:43,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:06:11,737 INFO L130 PetriNetUnfolder]: 176949/243438 cut-off events. [2023-08-30 01:06:11,738 INFO L131 PetriNetUnfolder]: For 1288910/1312089 co-relation queries the response was YES. [2023-08-30 01:06:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952961 conditions, 243438 events. 176949/243438 cut-off events. For 1288910/1312089 co-relation queries the response was YES. Maximal size of possible extension queue 7710. Compared 1819483 event pairs, 20103 based on Foata normal form. 33585/232493 useless extension candidates. Maximal degree in co-relation 952901. Up to 48224 conditions per place. [2023-08-30 01:06:15,152 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 257 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2023-08-30 01:06:15,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 332 transitions, 3431 flow [2023-08-30 01:06:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:06:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:06:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1778 transitions. [2023-08-30 01:06:15,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445 [2023-08-30 01:06:15,156 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1778 transitions. [2023-08-30 01:06:15,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1778 transitions. [2023-08-30 01:06:15,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:06:15,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1778 transitions. [2023-08-30 01:06:15,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 177.8) internal successors, (1778), 10 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:15,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:15,159 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 400.0) internal successors, (4400), 11 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:15,160 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1325 flow. Second operand 10 states and 1778 transitions. [2023-08-30 01:06:15,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 332 transitions, 3431 flow [2023-08-30 01:06:22,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 332 transitions, 3214 flow, removed 84 selfloop flow, removed 3 redundant places. [2023-08-30 01:06:22,681 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1873 flow [2023-08-30 01:06:22,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2023-08-30 01:06:22,681 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 117 predicate places. [2023-08-30 01:06:22,681 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1873 flow [2023-08-30 01:06:22,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.71428571428572) internal successors, (2306), 14 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:22,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:06:22,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:06:22,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 01:06:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:22,885 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 01:06:22,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:06:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1511699632, now seen corresponding path program 1 times [2023-08-30 01:06:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:06:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445249243] [2023-08-30 01:06:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:06:22,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 01:06:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:06:22,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 01:06:22,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 01:06:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:06:23,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:06:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:06:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:06:23,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:06:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:06:23,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:06:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445249243] [2023-08-30 01:06:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445249243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:06:23,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:06:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:06:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718957194] [2023-08-30 01:06:23,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:06:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:06:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:06:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:06:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:06:23,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 400 [2023-08-30 01:06:23,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1873 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:06:23,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:06:23,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 400 [2023-08-30 01:06:23,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand