./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-more-buffer-mult.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 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:11:37,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:11:37,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:11:37,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:11:37,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:11:37,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:11:37,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:11:37,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:11:37,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:11:37,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:11:37,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:11:37,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:11:37,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:11:37,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:11:37,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:11:37,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:11:37,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:11:37,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:11:37,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:11:37,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:11:37,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:11:37,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:11:37,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:11:37,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:11:37,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:11:37,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:11:37,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:11:37,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:11:37,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:11:37,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:11:37,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:11:37,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:11:37,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:11:37,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:11:37,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:11:37,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:11:37,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:11:37,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:11:37,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:11:37,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:11:37,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:11:37,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:11:37,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:11:37,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:11:37,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:11:37,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:11:37,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:11:37,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:11:37,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:11:37,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:11:37,950 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:11:37,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:11:37,951 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:11:37,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:11:37,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:11:37,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:11:37,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:11:37,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:11:37,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:11:37,953 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:11:37,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:11:37,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:11:37,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:11:37,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:11:37,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:11:37,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:11:37,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:11:37,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:11:37,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:11:37,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:11:37,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:11:37,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:11:37,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:11:37,955 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:11:37,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:11:37,956 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:11:37,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:11:38,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:11:38,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:11:38,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:11:38,294 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:11:38,294 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:11:38,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-09-01 03:11:39,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:11:39,821 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:11:39,821 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-09-01 03:11:39,831 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbc0eebd8/8314251e135644db9ff797359f98b0d1/FLAG286ae2313 [2023-09-01 03:11:39,854 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbc0eebd8/8314251e135644db9ff797359f98b0d1 [2023-09-01 03:11:39,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:11:39,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:11:39,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:11:39,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:11:39,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:11:39,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:39" (1/1) ... [2023-09-01 03:11:39,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38601478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:39, skipping insertion in model container [2023-09-01 03:11:39,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:39" (1/1) ... [2023-09-01 03:11:39,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:11:39,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:11:40,119 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-more-buffer-mult.wvr.c[4218,4231] [2023-09-01 03:11:40,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:11:40,156 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) [2023-09-01 03:11:40,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@323a7078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:40, skipping insertion in model container [2023-09-01 03:11:40,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:11:40,160 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:11:40,162 INFO L158 Benchmark]: Toolchain (without parser) took 303.29ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 33.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:11:40,163 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 54.5MB. Free memory was 32.3MB in the beginning and 32.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:11:40,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.87ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 33.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:11:40,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 54.5MB. Free memory was 32.3MB in the beginning and 32.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.87ms. Allocated memory is still 67.1MB. Free memory was 43.9MB in the beginning and 33.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 161]: 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-more-buffer-mult.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 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:11:41,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:11:41,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:11:41,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:11:41,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:11:41,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:11:41,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:11:41,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:11:41,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:11:41,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:11:41,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:11:41,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:11:41,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:11:41,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:11:41,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:11:42,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:11:42,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:11:42,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:11:42,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:11:42,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:11:42,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:11:42,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:11:42,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:11:42,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:11:42,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:11:42,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:11:42,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:11:42,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:11:42,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:11:42,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:11:42,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:11:42,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:11:42,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:11:42,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:11:42,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:11:42,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:11:42,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:11:42,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:11:42,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:11:42,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:11:42,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:11:42,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:11:42,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:11:42,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:11:42,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:11:42,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:11:42,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:11:42,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:11:42,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:11:42,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:11:42,085 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:11:42,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:11:42,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:11:42,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:11:42,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:11:42,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:11:42,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:11:42,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:11:42,088 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:11:42,088 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:11:42,088 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:11:42,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:11:42,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:11:42,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:11:42,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:11:42,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:11:42,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:11:42,090 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:11:42,090 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:11:42,090 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:11:42,090 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:11:42,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:11:42,091 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:11:42,091 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:11:42,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422a1b4addf42b15afc18c6b3ff87ab94cf45a5af46627fa0165a3dbe9c138e8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:11:42,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:11:42,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:11:42,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:11:42,450 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:11:42,450 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:11:42,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-09-01 03:11:43,730 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:11:43,950 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:11:43,951 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-09-01 03:11:43,956 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71810d0b2/74446b9105d042438415fe389753e3b7/FLAG1efdf566b [2023-09-01 03:11:43,969 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71810d0b2/74446b9105d042438415fe389753e3b7 [2023-09-01 03:11:43,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:11:43,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:11:43,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:11:43,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:11:43,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:11:43,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:43" (1/1) ... [2023-09-01 03:11:43,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f25272e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:43, skipping insertion in model container [2023-09-01 03:11:43,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:11:43" (1/1) ... [2023-09-01 03:11:43,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:11:44,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:11:44,177 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-more-buffer-mult.wvr.c[4218,4231] [2023-09-01 03:11:44,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:11:44,201 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:11:44,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:11:44,238 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-more-buffer-mult.wvr.c[4218,4231] [2023-09-01 03:11:44,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:11:44,268 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:11:44,316 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-more-buffer-mult.wvr.c[4218,4231] [2023-09-01 03:11:44,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:11:44,329 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:11:44,332 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:11:44,337 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:11:44,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44 WrapperNode [2023-09-01 03:11:44,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:11:44,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:11:44,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:11:44,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:11:44,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,414 INFO L138 Inliner]: procedures = 29, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 305 [2023-09-01 03:11:44,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:11:44,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:11:44,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:11:44,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:11:44,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,477 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:11:44,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:11:44,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:11:44,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:11:44,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (1/1) ... [2023-09-01 03:11:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:11:44,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:11:44,526 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) [2023-09-01 03:11:44,549 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 [2023-09-01 03:11:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:11:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:11:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:11:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:11:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:11:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:11:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:11:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:11:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:11:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:11:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:11:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:11:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:11:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:11:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:11:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:11:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:11:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:11:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:11:44,568 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:11:44,710 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:11:44,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:11:45,395 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:11:45,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:11:45,655 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 03:11:45,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:11:45 BoogieIcfgContainer [2023-09-01 03:11:45,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:11:45,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:11:45,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:11:45,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:11:45,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:11:43" (1/3) ... [2023-09-01 03:11:45,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b4d86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:11:45, skipping insertion in model container [2023-09-01 03:11:45,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:11:44" (2/3) ... [2023-09-01 03:11:45,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b4d86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:11:45, skipping insertion in model container [2023-09-01 03:11:45,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:11:45" (3/3) ... [2023-09-01 03:11:45,667 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-09-01 03:11:45,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:11:45,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 03:11:45,684 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:11:45,794 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:11:45,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 246 transitions, 524 flow [2023-09-01 03:11:45,959 INFO L130 PetriNetUnfolder]: 18/242 cut-off events. [2023-09-01 03:11:45,960 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:11:45,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 242 events. 18/242 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-09-01 03:11:45,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 246 transitions, 524 flow [2023-09-01 03:11:45,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 238 transitions, 500 flow [2023-09-01 03:11:45,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:11:46,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 238 transitions, 500 flow [2023-09-01 03:11:46,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 238 transitions, 500 flow [2023-09-01 03:11:46,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 238 transitions, 500 flow [2023-09-01 03:11:46,095 INFO L130 PetriNetUnfolder]: 18/238 cut-off events. [2023-09-01 03:11:46,096 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:11:46,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 238 events. 18/238 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 192. Up to 2 conditions per place. [2023-09-01 03:11:46,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2023-09-01 03:12:14,627 INFO L134 LiptonReduction]: Checked pairs total: 7003 [2023-09-01 03:12:14,627 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-09-01 03:12:14,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:12:14,647 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;@60b6c97f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:12:14,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-09-01 03:12:14,650 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:12:14,650 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:12:14,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:14,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:12:14,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:14,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 36285, now seen corresponding path program 1 times [2023-09-01 03:12:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:14,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775937524] [2023-09-01 03:12:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:14,685 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 [2023-09-01 03:12:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:14,688 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) [2023-09-01 03:12:14,701 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 [2023-09-01 03:12:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:12:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:15,132 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:12:15,133 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:12:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:15,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:15,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775937524] [2023-09-01 03:12:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775937524] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:15,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:12:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496029882] [2023-09-01 03:12:15,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:12:15,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:12:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:12:15,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 480 [2023-09-01 03:12:15,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:15,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:15,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 480 [2023-09-01 03:12:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:21,906 INFO L130 PetriNetUnfolder]: 42143/52999 cut-off events. [2023-09-01 03:12:21,906 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2023-09-01 03:12:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106406 conditions, 52999 events. 42143/52999 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 3648. Compared 296265 event pairs, 29020 based on Foata normal form. 0/17513 useless extension candidates. Maximal degree in co-relation 47480. Up to 26076 conditions per place. [2023-09-01 03:12:22,400 INFO L137 encePairwiseOnDemand]: 473/480 looper letters, 111 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-09-01 03:12:22,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 520 flow [2023-09-01 03:12:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-09-01 03:12:22,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2023-09-01 03:12:22,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-09-01 03:12:22,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-09-01 03:12:22,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:22,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-09-01 03:12:22,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:22,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:22,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:22,446 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 156 flow. Second operand 3 states and 716 transitions. [2023-09-01 03:12:22,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 520 flow [2023-09-01 03:12:22,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 121 transitions, 488 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:12:22,569 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 170 flow [2023-09-01 03:12:22,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-09-01 03:12:22,574 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -5 predicate places. [2023-09-01 03:12:22,574 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 170 flow [2023-09-01 03:12:22,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:22,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:22,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:12:22,590 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 [2023-09-01 03:12:22,790 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 [2023-09-01 03:12:22,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:22,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash 36286, now seen corresponding path program 1 times [2023-09-01 03:12:22,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049312180] [2023-09-01 03:12:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:22,792 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 [2023-09-01 03:12:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:22,794 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) [2023-09-01 03:12:22,797 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 [2023-09-01 03:12:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:12:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:22,981 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:12:22,981 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:12:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:23,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:23,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049312180] [2023-09-01 03:12:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049312180] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:23,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:12:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677247914] [2023-09-01 03:12:23,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:23,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:12:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:12:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:12:23,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 480 [2023-09-01 03:12:23,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:23,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:23,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 480 [2023-09-01 03:12:23,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:27,356 INFO L130 PetriNetUnfolder]: 42143/52995 cut-off events. [2023-09-01 03:12:27,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:12:27,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105601 conditions, 52995 events. 42143/52995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3648. Compared 296200 event pairs, 29020 based on Foata normal form. 2/17501 useless extension candidates. Maximal degree in co-relation 52789. Up to 52143 conditions per place. [2023-09-01 03:12:27,833 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 59 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-09-01 03:12:27,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 286 flow [2023-09-01 03:12:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-09-01 03:12:27,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2023-09-01 03:12:27,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-09-01 03:12:27,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-09-01 03:12:27,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:27,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-09-01 03:12:27,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:27,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:27,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:27,843 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 170 flow. Second operand 3 states and 656 transitions. [2023-09-01 03:12:27,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 286 flow [2023-09-01 03:12:27,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:12:27,846 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 160 flow [2023-09-01 03:12:27,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-09-01 03:12:27,847 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2023-09-01 03:12:27,847 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 160 flow [2023-09-01 03:12:27,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:27,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:27,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:12:27,857 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 [2023-09-01 03:12:28,057 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 [2023-09-01 03:12:28,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:28,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1128853, now seen corresponding path program 1 times [2023-09-01 03:12:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:28,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904535405] [2023-09-01 03:12:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:28,068 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 [2023-09-01 03:12:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:28,069 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) [2023-09-01 03:12:28,071 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 [2023-09-01 03:12:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:12:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,344 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-09-01 03:12:28,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-09-01 03:12:28,394 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 03:12:28,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-09-01 03:12:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:28,453 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 [2023-09-01 03:12:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:28,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:28,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904535405] [2023-09-01 03:12:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904535405] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:12:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298510482] [2023-09-01 03:12:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:12:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:28,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:12:28,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:12:28,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 480 [2023-09-01 03:12:28,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:28,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:28,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 480 [2023-09-01 03:12:28,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:31,945 INFO L130 PetriNetUnfolder]: 33863/42913 cut-off events. [2023-09-01 03:12:31,945 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:12:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85434 conditions, 42913 events. 33863/42913 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2852. Compared 238549 event pairs, 23140 based on Foata normal form. 0/14981 useless extension candidates. Maximal degree in co-relation 85426. Up to 42061 conditions per place. [2023-09-01 03:12:32,204 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 03:12:32,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 272 flow [2023-09-01 03:12:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-09-01 03:12:32,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46458333333333335 [2023-09-01 03:12:32,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-09-01 03:12:32,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-09-01 03:12:32,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:32,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-09-01 03:12:32,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:32,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:32,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:32,217 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 160 flow. Second operand 3 states and 669 transitions. [2023-09-01 03:12:32,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 272 flow [2023-09-01 03:12:32,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:32,221 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 157 flow [2023-09-01 03:12:32,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-09-01 03:12:32,222 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2023-09-01 03:12:32,222 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 157 flow [2023-09-01 03:12:32,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:32,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:32,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:12:32,237 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 [2023-09-01 03:12:32,433 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 [2023-09-01 03:12:32,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:32,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1128852, now seen corresponding path program 1 times [2023-09-01 03:12:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044189505] [2023-09-01 03:12:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:32,434 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 [2023-09-01 03:12:32,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:32,436 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) [2023-09-01 03:12:32,436 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 [2023-09-01 03:12:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:12:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:32,661 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-09-01 03:12:32,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-09-01 03:12:33,017 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-09-01 03:12:33,018 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 [2023-09-01 03:12:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:33,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:33,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:33,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044189505] [2023-09-01 03:12:33,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044189505] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:33,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:33,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:12:33,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283915316] [2023-09-01 03:12:33,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:33,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:12:33,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:12:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:12:33,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 480 [2023-09-01 03:12:33,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:33,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:33,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 480 [2023-09-01 03:12:33,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:36,102 INFO L130 PetriNetUnfolder]: 25583/32831 cut-off events. [2023-09-01 03:12:36,103 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:12:36,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65271 conditions, 32831 events. 25583/32831 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 183090 event pairs, 17260 based on Foata normal form. 0/12461 useless extension candidates. Maximal degree in co-relation 65262. Up to 31979 conditions per place. [2023-09-01 03:12:36,303 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 55 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 03:12:36,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 265 flow [2023-09-01 03:12:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-09-01 03:12:36,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45902777777777776 [2023-09-01 03:12:36,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-09-01 03:12:36,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-09-01 03:12:36,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:36,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-09-01 03:12:36,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:36,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:36,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:36,314 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 157 flow. Second operand 3 states and 661 transitions. [2023-09-01 03:12:36,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 265 flow [2023-09-01 03:12:36,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:36,316 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 154 flow [2023-09-01 03:12:36,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-09-01 03:12:36,317 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-09-01 03:12:36,317 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 154 flow [2023-09-01 03:12:36,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:36,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:36,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:12:36,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:12:36,531 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 [2023-09-01 03:12:36,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:36,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1128384, now seen corresponding path program 1 times [2023-09-01 03:12:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812428273] [2023-09-01 03:12:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:36,533 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 [2023-09-01 03:12:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:36,534 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) [2023-09-01 03:12:36,535 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 [2023-09-01 03:12:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:12:36,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:36,773 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:12:36,774 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:12:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:36,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:12:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:36,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:36,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812428273] [2023-09-01 03:12:36,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812428273] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:12:36,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:12:36,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:12:36,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504213898] [2023-09-01 03:12:36,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:12:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:12:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:12:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:12:38,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 480 [2023-09-01 03:12:38,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:38,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:38,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 480 [2023-09-01 03:12:38,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:43,012 INFO L130 PetriNetUnfolder]: 38378/49253 cut-off events. [2023-09-01 03:12:43,013 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:12:43,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97922 conditions, 49253 events. 38378/49253 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2770. Compared 285311 event pairs, 25890 based on Foata normal form. 0/18729 useless extension candidates. Maximal degree in co-relation 97912. Up to 15991 conditions per place. [2023-09-01 03:12:43,386 INFO L137 encePairwiseOnDemand]: 473/480 looper letters, 146 selfloop transitions, 15 changer transitions 0/167 dead transitions. [2023-09-01 03:12:43,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 720 flow [2023-09-01 03:12:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:12:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:12:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1301 transitions. [2023-09-01 03:12:43,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517361111111111 [2023-09-01 03:12:43,390 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1301 transitions. [2023-09-01 03:12:43,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1301 transitions. [2023-09-01 03:12:43,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:43,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1301 transitions. [2023-09-01 03:12:43,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.83333333333334) internal successors, (1301), 6 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:43,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:43,404 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:43,404 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 154 flow. Second operand 6 states and 1301 transitions. [2023-09-01 03:12:43,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 720 flow [2023-09-01 03:12:43,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 167 transitions, 719 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:43,409 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 266 flow [2023-09-01 03:12:43,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-09-01 03:12:43,411 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-09-01 03:12:43,412 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 266 flow [2023-09-01 03:12:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:43,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:43,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:12:43,429 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 [2023-09-01 03:12:43,626 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 [2023-09-01 03:12:43,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:43,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1084856634, now seen corresponding path program 1 times [2023-09-01 03:12:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926387958] [2023-09-01 03:12:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:43,628 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 [2023-09-01 03:12:43,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:43,629 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) [2023-09-01 03:12:43,629 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 [2023-09-01 03:12:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:12:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:43,882 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-09-01 03:12:43,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2023-09-01 03:12:43,930 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 03:12:43,931 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 80 treesize of output 81 [2023-09-01 03:12:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:44,045 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 [2023-09-01 03:12:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:44,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:44,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926387958] [2023-09-01 03:12:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926387958] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:44,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:44,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:12:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025495420] [2023-09-01 03:12:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:44,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:12:44,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:12:44,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:12:44,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 480 [2023-09-01 03:12:44,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:44,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:44,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 480 [2023-09-01 03:12:44,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:47,850 INFO L130 PetriNetUnfolder]: 36959/47366 cut-off events. [2023-09-01 03:12:47,851 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:12:47,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94193 conditions, 47366 events. 36959/47366 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2837. Compared 273717 event pairs, 24783 based on Foata normal form. 0/18289 useless extension candidates. Maximal degree in co-relation 94178. Up to 46088 conditions per place. [2023-09-01 03:12:48,154 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-09-01 03:12:48,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 392 flow [2023-09-01 03:12:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-09-01 03:12:48,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2023-09-01 03:12:48,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-09-01 03:12:48,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-09-01 03:12:48,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:48,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-09-01 03:12:48,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:48,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:48,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:48,162 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 266 flow. Second operand 3 states and 665 transitions. [2023-09-01 03:12:48,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 392 flow [2023-09-01 03:12:48,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 373 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:48,167 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 245 flow [2023-09-01 03:12:48,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-09-01 03:12:48,169 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-09-01 03:12:48,170 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 245 flow [2023-09-01 03:12:48,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:48,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:48,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:12:48,183 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 [2023-09-01 03:12:48,380 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 [2023-09-01 03:12:48,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:48,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1084856633, now seen corresponding path program 1 times [2023-09-01 03:12:48,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:48,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598689067] [2023-09-01 03:12:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:48,382 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 [2023-09-01 03:12:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:48,383 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) [2023-09-01 03:12:48,384 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 [2023-09-01 03:12:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:48,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:12:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:48,578 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-09-01 03:12:48,579 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 7 case distinctions, treesize of input 49 treesize of output 74 [2023-09-01 03:12:48,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:12:48,812 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-09-01 03:12:48,813 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 [2023-09-01 03:12:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:48,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:48,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:48,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598689067] [2023-09-01 03:12:48,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598689067] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:48,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:48,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:12:48,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252601379] [2023-09-01 03:12:48,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:48,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:12:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:12:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:12:49,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 480 [2023-09-01 03:12:49,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:49,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:49,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 480 [2023-09-01 03:12:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:53,716 INFO L130 PetriNetUnfolder]: 35540/45479 cut-off events. [2023-09-01 03:12:53,716 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:12:53,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 45479 events. 35540/45479 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2727. Compared 260813 event pairs, 23676 based on Foata normal form. 0/17875 useless extension candidates. Maximal degree in co-relation 90394. Up to 44201 conditions per place. [2023-09-01 03:12:54,059 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-09-01 03:12:54,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 367 flow [2023-09-01 03:12:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:12:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:12:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-09-01 03:12:54,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-09-01 03:12:54,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-09-01 03:12:54,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-09-01 03:12:54,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:54,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-09-01 03:12:54,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:54,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:54,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:54,067 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 245 flow. Second operand 3 states and 645 transitions. [2023-09-01 03:12:54,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 367 flow [2023-09-01 03:12:54,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:54,070 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 242 flow [2023-09-01 03:12:54,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-09-01 03:12:54,071 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-09-01 03:12:54,071 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 242 flow [2023-09-01 03:12:54,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:54,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:54,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:12:54,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-09-01 03:12:54,283 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 [2023-09-01 03:12:54,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:54,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash -729189314, now seen corresponding path program 1 times [2023-09-01 03:12:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948239376] [2023-09-01 03:12:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:12:54,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:12:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:54,286 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) [2023-09-01 03:12:54,286 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 [2023-09-01 03:12:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:12:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:12:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:12:54,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:12:54,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:12:54,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948239376] [2023-09-01 03:12:54,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948239376] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:12:54,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:12:54,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:12:54,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79466232] [2023-09-01 03:12:54,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:12:54,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:12:54,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:12:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:12:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:12:54,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 480 [2023-09-01 03:12:54,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:54,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:12:54,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 480 [2023-09-01 03:12:54,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:12:58,943 INFO L130 PetriNetUnfolder]: 39820/51583 cut-off events. [2023-09-01 03:12:58,943 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 03:12:59,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102577 conditions, 51583 events. 39820/51583 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3103. Compared 308705 event pairs, 26892 based on Foata normal form. 0/21465 useless extension candidates. Maximal degree in co-relation 102560. Up to 44200 conditions per place. [2023-09-01 03:12:59,338 INFO L137 encePairwiseOnDemand]: 471/480 looper letters, 104 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-09-01 03:12:59,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 592 flow [2023-09-01 03:12:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:12:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:12:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2023-09-01 03:12:59,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46822916666666664 [2023-09-01 03:12:59,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2023-09-01 03:12:59,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2023-09-01 03:12:59,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:12:59,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2023-09-01 03:12:59,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:59,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 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) [2023-09-01 03:12:59,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 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) [2023-09-01 03:12:59,346 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 242 flow. Second operand 4 states and 899 transitions. [2023-09-01 03:12:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 592 flow [2023-09-01 03:12:59,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:12:59,349 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 260 flow [2023-09-01 03:12:59,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-09-01 03:12:59,350 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-09-01 03:12:59,350 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 260 flow [2023-09-01 03:12:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:12:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:12:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:12:59,363 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 [2023-09-01 03:12:59,561 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 [2023-09-01 03:12:59,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:12:59,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:12:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash -740526467, now seen corresponding path program 2 times [2023-09-01 03:12:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:12:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702324990] [2023-09-01 03:12:59,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:12:59,563 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 [2023-09-01 03:12:59,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:12:59,564 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) [2023-09-01 03:12:59,566 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 [2023-09-01 03:12:59,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:12:59,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:12:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:12:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:12:59,853 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:12:59,853 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:13:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:00,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:13:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:00,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702324990] [2023-09-01 03:13:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702324990] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:13:00,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:13:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:13:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550159289] [2023-09-01 03:13:00,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:13:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:13:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:13:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:13:04,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 480 [2023-09-01 03:13:04,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:04,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:04,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 480 [2023-09-01 03:13:04,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:06,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:13:08,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:13:10,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:13:13,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:13:33,533 INFO L130 PetriNetUnfolder]: 132714/171900 cut-off events. [2023-09-01 03:13:33,534 INFO L131 PetriNetUnfolder]: For 14299/14299 co-relation queries the response was YES. [2023-09-01 03:13:34,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385932 conditions, 171900 events. 132714/171900 cut-off events. For 14299/14299 co-relation queries the response was YES. Maximal size of possible extension queue 7085. Compared 1134066 event pairs, 89640 based on Foata normal form. 18/86300 useless extension candidates. Maximal degree in co-relation 385913. Up to 44221 conditions per place. [2023-09-01 03:13:35,128 INFO L137 encePairwiseOnDemand]: 473/480 looper letters, 435 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2023-09-01 03:13:35,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 473 transitions, 2286 flow [2023-09-01 03:13:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:13:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:13:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2771 transitions. [2023-09-01 03:13:35,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810763888888889 [2023-09-01 03:13:35,136 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2771 transitions. [2023-09-01 03:13:35,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2771 transitions. [2023-09-01 03:13:35,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:35,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2771 transitions. [2023-09-01 03:13:35,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.91666666666666) internal successors, (2771), 12 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:35,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:35,150 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:35,150 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 260 flow. Second operand 12 states and 2771 transitions. [2023-09-01 03:13:35,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 473 transitions, 2286 flow [2023-09-01 03:13:35,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 473 transitions, 2280 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:13:35,164 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 498 flow [2023-09-01 03:13:35,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-09-01 03:13:35,165 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 17 predicate places. [2023-09-01 03:13:35,165 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 498 flow [2023-09-01 03:13:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:35,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:35,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:35,177 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 [2023-09-01 03:13:35,376 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 [2023-09-01 03:13:35,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:13:35,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1470143296, now seen corresponding path program 1 times [2023-09-01 03:13:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297858394] [2023-09-01 03:13:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:35,378 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 [2023-09-01 03:13:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:35,379 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) [2023-09-01 03:13:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:13:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:13:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:35,598 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:13:35,600 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:13:35,636 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 03:13:35,637 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 [2023-09-01 03:13:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:13:35,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:35,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297858394] [2023-09-01 03:13:35,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297858394] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:35,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:35,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:13:35,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775655973] [2023-09-01 03:13:35,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:13:35,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:35,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:13:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:13:35,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 480 [2023-09-01 03:13:35,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:35,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:35,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 480 [2023-09-01 03:13:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:46,659 INFO L130 PetriNetUnfolder]: 92634/121660 cut-off events. [2023-09-01 03:13:46,659 INFO L131 PetriNetUnfolder]: For 11822/11822 co-relation queries the response was YES. [2023-09-01 03:13:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266519 conditions, 121660 events. 92634/121660 cut-off events. For 11822/11822 co-relation queries the response was YES. Maximal size of possible extension queue 5058. Compared 805147 event pairs, 63360 based on Foata normal form. 0/67739 useless extension candidates. Maximal degree in co-relation 266492. Up to 118187 conditions per place. [2023-09-01 03:13:47,730 INFO L137 encePairwiseOnDemand]: 476/480 looper letters, 68 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-09-01 03:13:47,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 86 transitions, 650 flow [2023-09-01 03:13:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:13:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:13:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-09-01 03:13:47,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359375 [2023-09-01 03:13:47,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-09-01 03:13:47,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-09-01 03:13:47,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:47,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-09-01 03:13:47,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:47,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 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) [2023-09-01 03:13:47,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 480.0) internal successors, (2400), 5 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) [2023-09-01 03:13:47,737 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 498 flow. Second operand 4 states and 837 transitions. [2023-09-01 03:13:47,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 86 transitions, 650 flow [2023-09-01 03:13:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 591 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 03:13:47,749 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 455 flow [2023-09-01 03:13:47,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-09-01 03:13:47,750 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-09-01 03:13:47,750 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 455 flow [2023-09-01 03:13:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:47,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:47,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:13:47,762 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 (11)] Ended with exit code 0 [2023-09-01 03:13:47,961 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 [2023-09-01 03:13:47,962 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:13:47,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:47,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1129798890, now seen corresponding path program 1 times [2023-09-01 03:13:47,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:47,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328693215] [2023-09-01 03:13:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:47,962 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 [2023-09-01 03:13:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:47,963 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) [2023-09-01 03:13:47,964 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 [2023-09-01 03:13:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:13:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:48,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:13:48,178 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2023-09-01 03:13:48,178 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 5 case distinctions, treesize of input 36 treesize of output 63 [2023-09-01 03:13:48,640 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2023-09-01 03:13:48,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2023-09-01 03:13:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:13:48,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:48,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328693215] [2023-09-01 03:13:48,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328693215] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:48,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:48,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:13:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635577696] [2023-09-01 03:13:48,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:48,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:13:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:13:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:13:49,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 480 [2023-09-01 03:13:49,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 455 flow. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:13:49,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:49,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 480 [2023-09-01 03:13:49,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:59,820 INFO L130 PetriNetUnfolder]: 91144/119450 cut-off events. [2023-09-01 03:13:59,820 INFO L131 PetriNetUnfolder]: For 11731/11731 co-relation queries the response was YES. [2023-09-01 03:14:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261715 conditions, 119450 events. 91144/119450 cut-off events. For 11731/11731 co-relation queries the response was YES. Maximal size of possible extension queue 4828. Compared 783914 event pairs, 62330 based on Foata normal form. 0/67020 useless extension candidates. Maximal degree in co-relation 261687. Up to 115990 conditions per place. [2023-09-01 03:14:01,011 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-09-01 03:14:01,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 607 flow [2023-09-01 03:14:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:14:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:14:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-09-01 03:14:01,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534722222222222 [2023-09-01 03:14:01,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-09-01 03:14:01,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-09-01 03:14:01,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:01,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-09-01 03:14:01,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:01,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:01,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:01,018 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 455 flow. Second operand 3 states and 653 transitions. [2023-09-01 03:14:01,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 607 flow [2023-09-01 03:14:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 594 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:14:01,027 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 440 flow [2023-09-01 03:14:01,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-09-01 03:14:01,028 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 12 predicate places. [2023-09-01 03:14:01,028 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 440 flow [2023-09-01 03:14:01,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:01,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:01,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:01,039 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 (12)] Ended with exit code 0 [2023-09-01 03:14:01,239 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 [2023-09-01 03:14:01,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:14:01,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1129798889, now seen corresponding path program 1 times [2023-09-01 03:14:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:01,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773770288] [2023-09-01 03:14:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:01,240 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 [2023-09-01 03:14:01,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:01,241 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) [2023-09-01 03:14:01,242 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 [2023-09-01 03:14:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:14:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:01,470 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 03:14:01,471 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 3 case distinctions, treesize of input 18 treesize of output 47 [2023-09-01 03:14:01,489 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 [2023-09-01 03:14:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:01,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 03:14:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:01,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:14:01,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:01,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773770288] [2023-09-01 03:14:01,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773770288] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:14:01,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:14:01,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:14:01,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22562127] [2023-09-01 03:14:01,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:14:01,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:14:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:14:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:14:01,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 480 [2023-09-01 03:14:01,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:01,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:01,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 480 [2023-09-01 03:14:01,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:12,571 INFO L130 PetriNetUnfolder]: 89654/117240 cut-off events. [2023-09-01 03:14:12,571 INFO L131 PetriNetUnfolder]: For 11601/11601 co-relation queries the response was YES. [2023-09-01 03:14:13,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256955 conditions, 117240 events. 89654/117240 cut-off events. For 11601/11601 co-relation queries the response was YES. Maximal size of possible extension queue 4781. Compared 764314 event pairs, 61300 based on Foata normal form. 0/66300 useless extension candidates. Maximal degree in co-relation 256927. Up to 113780 conditions per place. [2023-09-01 03:14:13,771 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 75 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 03:14:13,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 82 transitions, 588 flow [2023-09-01 03:14:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:14:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:14:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-09-01 03:14:13,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2023-09-01 03:14:13,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-09-01 03:14:13,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-09-01 03:14:13,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:13,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-09-01 03:14:13,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:13,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:13,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:13,779 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 440 flow. Second operand 3 states and 657 transitions. [2023-09-01 03:14:13,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 82 transitions, 588 flow [2023-09-01 03:14:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 587 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:14:13,787 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 437 flow [2023-09-01 03:14:13,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-09-01 03:14:13,788 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2023-09-01 03:14:13,788 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 437 flow [2023-09-01 03:14:13,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:13,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:13,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:14:13,801 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 [2023-09-01 03:14:13,999 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 [2023-09-01 03:14:14,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:14:14,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1470143295, now seen corresponding path program 1 times [2023-09-01 03:14:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048205390] [2023-09-01 03:14:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:14,001 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 [2023-09-01 03:14:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:14,002 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) [2023-09-01 03:14:14,005 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 [2023-09-01 03:14:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:14:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:14,293 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:14:14,294 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 03:14:14,457 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:14:14,457 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 03:14:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:14,571 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 [2023-09-01 03:14:14,585 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 03:14:14,586 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 [2023-09-01 03:14:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:14,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:14:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:14:16,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048205390] [2023-09-01 03:14:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048205390] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:14:16,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:14:16,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:14:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113699938] [2023-09-01 03:14:16,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:14:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:14:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:14:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:14:25,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:14:25,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 480 [2023-09-01 03:14:25,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 437 flow. Second operand has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:14:25,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:14:25,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 480 [2023-09-01 03:14:25,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:30,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:14:38,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:15:06,052 INFO L130 PetriNetUnfolder]: 179146/234586 cut-off events. [2023-09-01 03:15:06,053 INFO L131 PetriNetUnfolder]: For 30192/30192 co-relation queries the response was YES. [2023-09-01 03:15:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508650 conditions, 234586 events. 179146/234586 cut-off events. For 30192/30192 co-relation queries the response was YES. Maximal size of possible extension queue 9184. Compared 1634327 event pairs, 121980 based on Foata normal form. 0/144782 useless extension candidates. Maximal degree in co-relation 508621. Up to 95161 conditions per place. [2023-09-01 03:15:08,689 INFO L137 encePairwiseOnDemand]: 471/480 looper letters, 183 selfloop transitions, 29 changer transitions 0/218 dead transitions. [2023-09-01 03:15:08,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 218 transitions, 1379 flow [2023-09-01 03:15:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 03:15:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 03:15:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2672 transitions. [2023-09-01 03:15:08,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2023-09-01 03:15:08,696 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2672 transitions. [2023-09-01 03:15:08,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2672 transitions. [2023-09-01 03:15:08,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:08,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2672 transitions. [2023-09-01 03:15:08,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 190.85714285714286) internal successors, (2672), 14 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:08,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 480.0) internal successors, (7200), 15 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:08,709 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 480.0) internal successors, (7200), 15 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:08,709 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 437 flow. Second operand 14 states and 2672 transitions. [2023-09-01 03:15:08,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 218 transitions, 1379 flow [2023-09-01 03:15:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 218 transitions, 1378 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:15:08,729 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 663 flow [2023-09-01 03:15:08,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=663, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-09-01 03:15:08,729 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 27 predicate places. [2023-09-01 03:15:08,730 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 663 flow [2023-09-01 03:15:08,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.5) internal successors, (1444), 8 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:08,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:08,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:15:08,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:15:08,940 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 [2023-09-01 03:15:08,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-09-01 03:15:08,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash -664033129, now seen corresponding path program 1 times [2023-09-01 03:15:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885360891] [2023-09-01 03:15:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:15:08,942 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 [2023-09-01 03:15:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:08,942 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) [2023-09-01 03:15:08,944 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 [2023-09-01 03:15:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:15:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:15:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:09,033 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 [2023-09-01 03:15:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:15:09,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:15:09,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885360891] [2023-09-01 03:15:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885360891] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:15:09,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:15:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:15:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178590686] [2023-09-01 03:15:09,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:15:09,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:15:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:15:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:15:09,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 480 [2023-09-01 03:15:09,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 663 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:09,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:09,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 480 [2023-09-01 03:15:09,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand