./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.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-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 03:12:57,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:12:57,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:12:57,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:12:57,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:12:57,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:12:57,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:12:57,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:12:57,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:12:57,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:12:57,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:12:57,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:12:57,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:12:57,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:12:57,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:12:57,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:12:57,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:12:57,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:12:57,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:12:57,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:12:57,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:12:57,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:12:57,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:12:57,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:12:57,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:12:57,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:12:57,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:12:57,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:12:57,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:12:57,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:12:57,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:12:57,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:12:57,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:12:57,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:12:57,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:12:57,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:12:57,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:12:57,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:12:57,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:12:57,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:12:57,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:12:57,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:12:57,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:12:57,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:12:57,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:12:57,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:12:57,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:12:57,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:12:57,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:12:57,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:12:57,951 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:12:57,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:12:57,951 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:12:57,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:12:57,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:12:57,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:12:57,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:12:57,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:12:57,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:12:57,953 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:12:57,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:12:57,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:12:57,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:12:57,953 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:12:57,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:12:57,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:12:57,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:12:57,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:12:57,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:12:57,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:12:57,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:12:57,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:12:57,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:12:57,956 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:12:57,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:12:57,956 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:12:57,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:12:58,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:12:58,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:12:58,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:12:58,321 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:12:58,322 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:12:58,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-09-01 03:12:59,516 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:12:59,712 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:12:59,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-09-01 03:12:59,720 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96ae58f9/d3b58820b29d42b5a9b7230b4bb04e97/FLAG332dec861 [2023-09-01 03:12:59,736 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96ae58f9/d3b58820b29d42b5a9b7230b4bb04e97 [2023-09-01 03:12:59,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:12:59,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:12:59,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:12:59,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:12:59,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:12:59,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:12:59" (1/1) ... [2023-09-01 03:12:59,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bea108e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:12:59, skipping insertion in model container [2023-09-01 03:12:59,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:12:59" (1/1) ... [2023-09-01 03:12:59,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:12:59,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:12:59,922 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-series.wvr.c[4351,4364] [2023-09-01 03:12:59,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:12:59,939 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 03:12:59,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55cd781e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:12:59, skipping insertion in model container [2023-09-01 03:12:59,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:12:59,940 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:12:59,941 INFO L158 Benchmark]: Toolchain (without parser) took 201.58ms. Allocated memory is still 71.3MB. Free memory was 40.2MB in the beginning and 45.5MB in the end (delta: -5.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 03:12:59,942 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 34.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:12:59,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.01ms. Allocated memory is still 71.3MB. Free memory was 40.0MB in the beginning and 45.5MB in the end (delta: -5.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 03:12:59,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 34.0MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.01ms. Allocated memory is still 71.3MB. Free memory was 40.0MB in the beginning and 45.5MB in the end (delta: -5.4MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: 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-series.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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --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 03:13:01,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:13:01,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:13:01,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:13:01,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:13:01,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:13:01,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:13:01,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:13:01,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:13:01,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:13:01,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:13:01,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:13:01,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:13:01,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:13:01,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:13:01,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:13:01,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:13:01,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:13:01,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:13:01,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:13:01,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:13:01,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:13:01,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:13:01,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:13:01,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:13:01,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:13:01,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:13:01,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:13:01,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:13:01,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:13:01,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:13:01,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:13:01,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:13:01,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:13:01,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:13:01,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:13:01,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:13:01,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:13:01,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:13:01,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:13:01,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:13:01,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:13:01,631 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:13:01,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:13:01,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:13:01,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:13:01,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:13:01,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:13:01,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:13:01,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:13:01,634 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:13:01,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:13:01,635 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:13:01,636 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:13:01,636 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:13:01,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:13:01,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:13:01,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:13:01,637 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:13:01,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:13:01,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:13:01,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:13:01,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:13:01,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:13:01,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:13:01,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:13:01,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:13:01,638 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:13:01,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:13:01,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:13:01,639 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:13:01,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:13:01,639 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:13:01,640 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:13:01,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:13:01,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:13:01,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:13:01,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:13:01,982 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:13:01,983 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:13:01,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-09-01 03:13:03,134 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:13:03,349 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:13:03,350 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series.wvr.c [2023-09-01 03:13:03,357 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f1245fd/29a6425838c04d4e9ab0653100a4bac8/FLAGda9a381dd [2023-09-01 03:13:03,369 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f1245fd/29a6425838c04d4e9ab0653100a4bac8 [2023-09-01 03:13:03,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:13:03,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:13:03,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:03,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:13:03,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:13:03,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e79e43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03, skipping insertion in model container [2023-09-01 03:13:03,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:13:03,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:13:03,619 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-series.wvr.c[4351,4364] [2023-09-01 03:13:03,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:03,664 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:13:03,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:13:03,692 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-series.wvr.c[4351,4364] [2023-09-01 03:13:03,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:03,701 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:13:03,736 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-series.wvr.c[4351,4364] [2023-09-01 03:13:03,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:13:03,757 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:13:03,757 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:13:03,763 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:13:03,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03 WrapperNode [2023-09-01 03:13:03,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:13:03,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:13:03,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:13:03,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:13:03,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,836 INFO L138 Inliner]: procedures = 29, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 348 [2023-09-01 03:13:03,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:13:03,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:13:03,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:13:03,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:13:03,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,902 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:13:03,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:13:03,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:13:03,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:13:03,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (1/1) ... [2023-09-01 03:13:03,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:13:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:13:03,951 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 03:13:03,974 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 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:13:03,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:13:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:13:03,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:13:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:13:03,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:13:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:13:03,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:13:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:13:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:13:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:13:03,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:13:03,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:13:03,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:13:03,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:13:03,995 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 03:13:04,177 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:13:04,179 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:13:04,960 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:13:05,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:13:05,247 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-09-01 03:13:05,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:13:05 BoogieIcfgContainer [2023-09-01 03:13:05,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:13:05,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:13:05,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:13:05,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:13:05,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:13:03" (1/3) ... [2023-09-01 03:13:05,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b95bf43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:13:05, skipping insertion in model container [2023-09-01 03:13:05,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:13:03" (2/3) ... [2023-09-01 03:13:05,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b95bf43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:13:05, skipping insertion in model container [2023-09-01 03:13:05,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:13:05" (3/3) ... [2023-09-01 03:13:05,259 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-09-01 03:13:05,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:13:05,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-09-01 03:13:05,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:13:05,385 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:13:05,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 285 transitions, 602 flow [2023-09-01 03:13:05,565 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2023-09-01 03:13:05,566 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:13:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 281 events. 22/281 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-09-01 03:13:05,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 285 transitions, 602 flow [2023-09-01 03:13:05,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 277 transitions, 578 flow [2023-09-01 03:13:05,588 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:13:05,596 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 277 transitions, 578 flow [2023-09-01 03:13:05,599 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 277 transitions, 578 flow [2023-09-01 03:13:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 277 transitions, 578 flow [2023-09-01 03:13:05,639 INFO L130 PetriNetUnfolder]: 22/277 cut-off events. [2023-09-01 03:13:05,644 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:13:05,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 277 events. 22/277 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 311 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-09-01 03:13:05,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 4104 [2023-09-01 03:13:33,756 INFO L134 LiptonReduction]: Checked pairs total: 8697 [2023-09-01 03:13:33,756 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-09-01 03:13:33,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:13:33,786 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;@3ada3c03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:13:33,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-09-01 03:13:33,793 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:13:33,793 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:13:33,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:33,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:13:33,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:13:33,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash 43390, now seen corresponding path program 1 times [2023-09-01 03:13:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764760487] [2023-09-01 03:13:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:33,811 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 03:13:33,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:33,817 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 03:13:33,861 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 03:13:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:13:33,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:34,218 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 03:13:34,219 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 03:13:34,260 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 03:13:34,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:34,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764760487] [2023-09-01 03:13:34,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764760487] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:34,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:34,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:13:34,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443792153] [2023-09-01 03:13:34,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:34,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:13:34,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:13:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:13:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-09-01 03:13:34,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 03:13:34,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:34,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-09-01 03:13:34,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:40,067 INFO L130 PetriNetUnfolder]: 38573/47848 cut-off events. [2023-09-01 03:13:40,067 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2023-09-01 03:13:40,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95959 conditions, 47848 events. 38573/47848 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 3592. Compared 254278 event pairs, 25706 based on Foata normal form. 0/12053 useless extension candidates. Maximal degree in co-relation 88338. Up to 47088 conditions per place. [2023-09-01 03:13:40,512 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 63 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-09-01 03:13:40,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 292 flow [2023-09-01 03:13:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:13:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:13:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-09-01 03:13:40,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43797766019988243 [2023-09-01 03:13:40,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-09-01 03:13:40,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-09-01 03:13:40,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:40,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-09-01 03:13:40,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 03:13:40,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:13:40,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:13:40,673 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 176 flow. Second operand 3 states and 745 transitions. [2023-09-01 03:13:40,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 292 flow [2023-09-01 03:13:40,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:13:40,791 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 150 flow [2023-09-01 03:13:40,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-09-01 03:13:40,795 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -12 predicate places. [2023-09-01 03:13:40,796 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 150 flow [2023-09-01 03:13:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 03:13:40,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:40,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:13:40,809 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 03:13:41,010 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 03:13:41,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:13:41,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 43391, now seen corresponding path program 1 times [2023-09-01 03:13:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064670409] [2023-09-01 03:13:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:41,013 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 03:13:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:41,014 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 03:13:41,028 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 03:13:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:13:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:41,299 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:13:41,300 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 03:13:41,345 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 03:13:41,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:13:41,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:41,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064670409] [2023-09-01 03:13:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064670409] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:13:41,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:13:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:13:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385134445] [2023-09-01 03:13:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:13:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:13:41,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:13:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:13:41,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 567 [2023-09-01 03:13:41,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 03:13:41,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:41,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 567 [2023-09-01 03:13:41,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:13:50,410 INFO L130 PetriNetUnfolder]: 77145/95692 cut-off events. [2023-09-01 03:13:50,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:13:50,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190654 conditions, 95692 events. 77145/95692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6820. Compared 544318 event pairs, 51412 based on Foata normal form. 0/25089 useless extension candidates. Maximal degree in co-relation 190648. Up to 47089 conditions per place. [2023-09-01 03:13:51,146 INFO L137 encePairwiseOnDemand]: 558/567 looper letters, 118 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-09-01 03:13:51,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 130 transitions, 526 flow [2023-09-01 03:13:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:13:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:13:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-09-01 03:13:51,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714873603762493 [2023-09-01 03:13:51,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-09-01 03:13:51,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-09-01 03:13:51,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:13:51,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-09-01 03:13:51,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 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 03:13:51,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:13:51,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:13:51,158 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 150 flow. Second operand 3 states and 802 transitions. [2023-09-01 03:13:51,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 130 transitions, 526 flow [2023-09-01 03:13:51,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 130 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:13:51,163 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 199 flow [2023-09-01 03:13:51,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-09-01 03:13:51,164 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -9 predicate places. [2023-09-01 03:13:51,165 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 199 flow [2023-09-01 03:13:51,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 03:13:51,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:13:51,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:13:51,177 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 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:13:51,377 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 03:13:51,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:13:51,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:13:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1347592, now seen corresponding path program 1 times [2023-09-01 03:13:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:13:51,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049257815] [2023-09-01 03:13:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:13:51,379 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 03:13:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:13:51,381 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 03:13:51,383 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 (4)] Waiting until timeout for monitored process [2023-09-01 03:13:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:13:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:13:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:13:51,834 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:13:51,835 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 03:13:51,932 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 03:13:51,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:13:52,187 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 03:13:52,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:13:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049257815] [2023-09-01 03:13:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049257815] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:13:52,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:13:52,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:13:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620979551] [2023-09-01 03:13:52,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:13:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:13:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:13:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:13:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:13:53,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 567 [2023-09-01 03:13:53,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 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 03:13:53,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:13:53,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 567 [2023-09-01 03:13:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:14:07,941 INFO L130 PetriNetUnfolder]: 115727/143552 cut-off events. [2023-09-01 03:14:07,941 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:14:08,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286049 conditions, 143552 events. 115727/143552 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9112. Compared 840621 event pairs, 77118 based on Foata normal form. 0/38146 useless extension candidates. Maximal degree in co-relation 286040. Up to 47090 conditions per place. [2023-09-01 03:14:08,747 INFO L137 encePairwiseOnDemand]: 555/567 looper letters, 173 selfloop transitions, 27 changer transitions 0/206 dead transitions. [2023-09-01 03:14:08,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 206 transitions, 919 flow [2023-09-01 03:14:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:14:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:14:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1469 transitions. [2023-09-01 03:14:08,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43180482069370957 [2023-09-01 03:14:08,753 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1469 transitions. [2023-09-01 03:14:08,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1469 transitions. [2023-09-01 03:14:08,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:14:08,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1469 transitions. [2023-09-01 03:14:08,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 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 03:14:08,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 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 03:14:08,769 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 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 03:14:08,769 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 199 flow. Second operand 6 states and 1469 transitions. [2023-09-01 03:14:08,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 206 transitions, 919 flow [2023-09-01 03:14:08,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 206 transitions, 895 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:14:08,776 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 391 flow [2023-09-01 03:14:08,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2023-09-01 03:14:08,777 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -2 predicate places. [2023-09-01 03:14:08,778 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 391 flow [2023-09-01 03:14:08,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 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 03:14:08,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:14:08,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:14:08,794 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 (4)] Ended with exit code 0 [2023-09-01 03:14:08,996 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 03:14:08,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:14:08,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:14:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 41833433, now seen corresponding path program 1 times [2023-09-01 03:14:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:14:08,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094512687] [2023-09-01 03:14:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:14:08,998 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 03:14:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:14:08,999 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 03:14:09,000 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 03:14:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:14:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:14:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:14:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:09,267 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-09-01 03:14:09,268 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 03:14:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:14:10,005 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-09-01 03:14:10,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2023-09-01 03:14:11,398 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-09-01 03:14:11,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2023-09-01 03:14:59,381 WARN L222 SmtUtils]: Spent 24.78s on a formula simplification. DAG size of input: 253 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:14:59,383 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 03:14:59,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:14:59,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:14:59,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094512687] [2023-09-01 03:14:59,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094512687] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:14:59,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:14:59,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:14:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455656604] [2023-09-01 03:14:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:14:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:14:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:14:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:14:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 03:15:04,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 03:15:07,149 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 [0] [2023-09-01 03:15:09,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 567 [2023-09-01 03:15:09,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 03:15:09,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:09,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 567 [2023-09-01 03:15:09,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:20,128 INFO L130 PetriNetUnfolder]: 92445/115467 cut-off events. [2023-09-01 03:15:20,129 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 03:15:20,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229941 conditions, 115467 events. 92445/115467 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7470. Compared 680025 event pairs, 61038 based on Foata normal form. 0/31619 useless extension candidates. Maximal degree in co-relation 229928. Up to 113187 conditions per place. [2023-09-01 03:15:20,835 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 85 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2023-09-01 03:15:20,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 92 transitions, 543 flow [2023-09-01 03:15:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:15:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:15:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-09-01 03:15:20,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38330393885949443 [2023-09-01 03:15:20,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-09-01 03:15:20,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-09-01 03:15:20,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:20,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-09-01 03:15:20,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 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 03:15:20,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:15:20,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:15:20,849 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 391 flow. Second operand 3 states and 652 transitions. [2023-09-01 03:15:20,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 92 transitions, 543 flow [2023-09-01 03:15:20,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 92 transitions, 513 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 03:15:20,854 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 343 flow [2023-09-01 03:15:20,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-09-01 03:15:20,855 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -3 predicate places. [2023-09-01 03:15:20,855 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 343 flow [2023-09-01 03:15:20,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 03:15:20,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:20,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:15:20,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 03:15:21,056 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 03:15:21,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:15:21,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash 41833435, now seen corresponding path program 1 times [2023-09-01 03:15:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805250895] [2023-09-01 03:15:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:15:21,058 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 03:15:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:21,061 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 03:15:21,062 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 03:15:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:15:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 03:15:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,336 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-09-01 03:15:21,336 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 03:15:21,371 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 03:15:21,372 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 03:15:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,413 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 03:15:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:21,443 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 03:15:21,463 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 03:15:21,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:15:21,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:15:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805250895] [2023-09-01 03:15:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805250895] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:15:21,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:15:21,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:15:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772178272] [2023-09-01 03:15:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:15:21,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:15:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:15:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:15:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:15:21,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-09-01 03:15:21,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:21,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:15:21,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-09-01 03:15:21,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:15:29,634 INFO L130 PetriNetUnfolder]: 69163/87382 cut-off events. [2023-09-01 03:15:29,634 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:15:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173745 conditions, 87382 events. 69163/87382 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5321. Compared 517215 event pairs, 44958 based on Foata normal form. 0/27059 useless extension candidates. Maximal degree in co-relation 173731. Up to 85102 conditions per place. [2023-09-01 03:15:30,192 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 81 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-09-01 03:15:30,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 487 flow [2023-09-01 03:15:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:15:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:15:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-09-01 03:15:30,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44738389182833627 [2023-09-01 03:15:30,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-09-01 03:15:30,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-09-01 03:15:30,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:15:30,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-09-01 03:15:30,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 03:15:30,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:15:30,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:15:30,202 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 343 flow. Second operand 3 states and 761 transitions. [2023-09-01 03:15:30,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 487 flow [2023-09-01 03:15:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:15:30,206 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 324 flow [2023-09-01 03:15:30,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-09-01 03:15:30,207 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -4 predicate places. [2023-09-01 03:15:30,207 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 324 flow [2023-09-01 03:15:30,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:15:30,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:15:30,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:15:30,219 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 03:15:30,420 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 03:15:30,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:15:30,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:15:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257830, now seen corresponding path program 1 times [2023-09-01 03:15:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:15:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684193291] [2023-09-01 03:15:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:15:30,422 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 03:15:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:15:30,423 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 03:15:30,425 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 03:15:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:15:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:15:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:15:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:30,656 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-09-01 03:15:30,657 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 03:15:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:15:32,103 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2023-09-01 03:15:32,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2023-09-01 03:15:32,992 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-09-01 03:15:32,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 174 [2023-09-01 03:16:31,908 WARN L222 SmtUtils]: Spent 31.52s on a formula simplification. DAG size of input: 395 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:16:32,229 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 03:16:32,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:32,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:32,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684193291] [2023-09-01 03:16:32,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684193291] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:32,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:32,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:16:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700519155] [2023-09-01 03:16:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:16:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:16:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 03:16:34,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 567 [2023-09-01 03:16:34,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 03:16:34,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:34,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 567 [2023-09-01 03:16:34,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:42,032 INFO L130 PetriNetUnfolder]: 67192/84787 cut-off events. [2023-09-01 03:16:42,032 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:16:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168556 conditions, 84787 events. 67192/84787 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5177. Compared 498563 event pairs, 43455 based on Foata normal form. 0/26588 useless extension candidates. Maximal degree in co-relation 168541. Up to 82507 conditions per place. [2023-09-01 03:16:42,693 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 79 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-09-01 03:16:42,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 480 flow [2023-09-01 03:16:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-09-01 03:16:42,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-09-01 03:16:42,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-09-01 03:16:42,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-09-01 03:16:42,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:42,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-09-01 03:16:42,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 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 03:16:42,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:16:42,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:16:42,701 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 324 flow. Second operand 3 states and 648 transitions. [2023-09-01 03:16:42,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 480 flow [2023-09-01 03:16:42,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:42,704 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 321 flow [2023-09-01 03:16:42,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2023-09-01 03:16:42,705 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -5 predicate places. [2023-09-01 03:16:42,705 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 321 flow [2023-09-01 03:16:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 03:16:42,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:42,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:16:42,719 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 03:16:42,916 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 03:16:42,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:16:42,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1547257831, now seen corresponding path program 1 times [2023-09-01 03:16:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035041772] [2023-09-01 03:16:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:16:42,918 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 03:16:42,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:42,918 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 03:16:42,919 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 03:16:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:16:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:16:43,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,175 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2023-09-01 03:16:43,176 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 03:16:43,209 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 03:16:43,210 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 03:16:43,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,300 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 03:16:43,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:16:43,325 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 03:16:43,382 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 03:16:43,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:16:43,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:43,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035041772] [2023-09-01 03:16:43,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035041772] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:16:43,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:16:43,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:16:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704439839] [2023-09-01 03:16:43,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:16:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:16:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:16:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:16:43,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-09-01 03:16:43,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 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 03:16:43,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:43,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-09-01 03:16:43,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:16:51,100 INFO L130 PetriNetUnfolder]: 65221/82192 cut-off events. [2023-09-01 03:16:51,100 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:16:51,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163367 conditions, 82192 events. 65221/82192 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5033. Compared 480110 event pairs, 41952 based on Foata normal form. 0/26117 useless extension candidates. Maximal degree in co-relation 163351. Up to 79912 conditions per place. [2023-09-01 03:16:51,582 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-09-01 03:16:51,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 473 flow [2023-09-01 03:16:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:16:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:16:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 757 transitions. [2023-09-01 03:16:51,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450323339212228 [2023-09-01 03:16:51,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 757 transitions. [2023-09-01 03:16:51,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 757 transitions. [2023-09-01 03:16:51,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:16:51,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 757 transitions. [2023-09-01 03:16:51,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 03:16:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:16:51,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 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 03:16:51,591 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 321 flow. Second operand 3 states and 757 transitions. [2023-09-01 03:16:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 473 flow [2023-09-01 03:16:51,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:16:51,594 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 318 flow [2023-09-01 03:16:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=318, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2023-09-01 03:16:51,595 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, -6 predicate places. [2023-09-01 03:16:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 318 flow [2023-09-01 03:16:51,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 0 states have call successors, (0), 0 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 03:16:51,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:16:51,596 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:16:51,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:16:51,806 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 03:16:51,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:16:51,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:16:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1493861311, now seen corresponding path program 2 times [2023-09-01 03:16:51,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:16:51,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241196553] [2023-09-01 03:16:51,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:16:51,808 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 03:16:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:16:51,808 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 03:16:51,810 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 03:16:51,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:16:51,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:16:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:16:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:16:52,063 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 03:16:52,064 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 03:16:52,229 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 03:16:52,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:16:52,793 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 03:16:52,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:16:52,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241196553] [2023-09-01 03:16:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241196553] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:16:52,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:16:52,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:16:52,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021859998] [2023-09-01 03:16:52,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:16:52,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:16:52,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:16:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:16:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:16:58,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 567 [2023-09-01 03:16:58,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 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 03:16:58,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:16:58,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 567 [2023-09-01 03:16:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:17:00,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:02,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:04,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:07,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:09,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:11,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:12,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:15,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:18,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:19,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:21,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:24,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 03:17:55,180 INFO L130 PetriNetUnfolder]: 217384/273932 cut-off events. [2023-09-01 03:17:55,181 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 03:17:55,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544359 conditions, 273932 events. 217384/273932 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 10412. Compared 1727997 event pairs, 139840 based on Foata normal form. 16/90102 useless extension candidates. Maximal degree in co-relation 544342. Up to 26650 conditions per place. [2023-09-01 03:17:56,973 INFO L137 encePairwiseOnDemand]: 557/567 looper letters, 479 selfloop transitions, 53 changer transitions 0/538 dead transitions. [2023-09-01 03:17:56,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 538 transitions, 2530 flow [2023-09-01 03:17:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:17:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:17:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3956 transitions. [2023-09-01 03:17:56,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43606701940035275 [2023-09-01 03:17:56,983 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3956 transitions. [2023-09-01 03:17:56,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3956 transitions. [2023-09-01 03:17:56,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:17:56,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3956 transitions. [2023-09-01 03:17:56,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 247.25) internal successors, (3956), 16 states have internal predecessors, (3956), 0 states have call successors, (0), 0 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 03:17:57,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 567.0) internal successors, (9639), 17 states have internal predecessors, (9639), 0 states have call successors, (0), 0 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 03:17:57,004 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 567.0) internal successors, (9639), 17 states have internal predecessors, (9639), 0 states have call successors, (0), 0 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 03:17:57,004 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 318 flow. Second operand 16 states and 3956 transitions. [2023-09-01 03:17:57,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 538 transitions, 2530 flow [2023-09-01 03:17:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 538 transitions, 2529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:17:57,012 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 712 flow [2023-09-01 03:17:57,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=712, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2023-09-01 03:17:57,013 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 18 predicate places. [2023-09-01 03:17:57,013 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 712 flow [2023-09-01 03:17:57,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.0) internal successors, (2568), 12 states have internal predecessors, (2568), 0 states have call successors, (0), 0 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 03:17:57,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:17:57,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:17:57,028 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 03:17:57,228 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 03:17:57,229 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-09-01 03:17:57,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:17:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 720344793, now seen corresponding path program 1 times [2023-09-01 03:17:57,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:17:57,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575623838] [2023-09-01 03:17:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:17:57,230 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 03:17:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:17:57,231 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 03:17:57,271 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 03:17:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:17:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:17:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:17:57,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 03:17:57,499 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 03:17:57,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:17:57,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:17:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575623838] [2023-09-01 03:17:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575623838] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:17:57,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:17:57,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:17:57,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626663770] [2023-09-01 03:17:57,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:17:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:17:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:17:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:17:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:17:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 567 [2023-09-01 03:17:58,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 712 flow. Second operand has 6 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 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 03:17:58,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:17:58,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 567 [2023-09-01 03:17:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand