./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.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-three-array-min.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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --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 04:00:27,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:00:27,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:00:28,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:00:28,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:00:28,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:00:28,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:00:28,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:00:28,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:00:28,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:00:28,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:00:28,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:00:28,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:00:28,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:00:28,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:00:28,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:00:28,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:00:28,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:00:28,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:00:28,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:00:28,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:00:28,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:00:28,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:00:28,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:00:28,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:00:28,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:00:28,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:00:28,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:00:28,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:00:28,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:00:28,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:00:28,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:00:28,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:00:28,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:00:28,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:00:28,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:00:28,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:00:28,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:00:28,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:00:28,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:00:28,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:00:28,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:00:28,099 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:00:28,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:00:28,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:00:28,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:00:28,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:00:28,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:00:28,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:00:28,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:00:28,102 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:00:28,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:00:28,103 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:00:28,103 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:00:28,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:00:28,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:00:28,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:00:28,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:00:28,104 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:00:28,105 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:00:28,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:00:28,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:00:28,105 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:00:28,105 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:00:28,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:00:28,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:00:28,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:00:28,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:00:28,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:00:28,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:00:28,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:00:28,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:00:28,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:00:28,107 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:00:28,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:00:28,108 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:00:28,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:00:28,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:00:28,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:00:28,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:00:28,406 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:00:28,406 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:00:28,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-09-01 04:00:29,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:00:29,824 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:00:29,825 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-09-01 04:00:29,835 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07df60549/807c1dd0f75b4bcf9b7612e1f44e0de5/FLAG1b400a62f [2023-09-01 04:00:29,858 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07df60549/807c1dd0f75b4bcf9b7612e1f44e0de5 [2023-09-01 04:00:29,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:00:29,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:00:29,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:00:29,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:00:29,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:00:29,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:00:29" (1/1) ... [2023-09-01 04:00:29,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1b1575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:29, skipping insertion in model container [2023-09-01 04:00:29,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:00:29" (1/1) ... [2023-09-01 04:00:29,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:00:29,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:00:30,087 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-three-array-min.wvr.c[2815,2828] [2023-09-01 04:00:30,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:00:30,115 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 04:00:30,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d061cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:30, skipping insertion in model container [2023-09-01 04:00:30,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:00:30,118 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:00:30,120 INFO L158 Benchmark]: Toolchain (without parser) took 257.11ms. Allocated memory is still 71.3MB. Free memory was 49.2MB in the beginning and 39.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:00:30,121 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 71.3MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:00:30,121 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.87ms. Allocated memory is still 71.3MB. Free memory was 49.0MB in the beginning and 39.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:00:30,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 71.3MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.87ms. Allocated memory is still 71.3MB. Free memory was 49.0MB in the beginning and 39.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: 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-three-array-min.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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --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 04:00:31,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:00:31,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:00:31,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:00:31,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:00:31,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:00:31,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:00:31,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:00:31,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:00:31,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:00:31,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:00:31,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:00:31,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:00:31,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:00:31,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:00:31,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:00:31,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:00:31,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:00:31,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:00:31,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:00:31,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:00:31,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:00:31,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:00:31,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:00:31,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:00:31,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:00:31,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:00:31,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:00:31,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:00:31,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:00:31,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:00:31,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:00:31,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:00:31,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:00:31,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:00:31,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:00:31,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:00:31,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:00:31,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:00:31,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:00:31,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:00:31,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:00:31,929 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:00:31,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:00:31,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:00:31,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:00:31,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:00:31,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:00:31,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:00:31,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:00:31,933 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:00:31,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:00:31,934 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:00:31,934 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:00:31,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:00:31,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:00:31,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:00:31,935 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:00:31,935 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:00:31,935 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:00:31,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:00:31,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:00:31,936 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:00:31,936 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:00:31,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:00:31,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:00:31,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:00:31,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:00:31,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:00:31,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:00:31,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:00:31,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:00:31,938 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:00:31,938 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:00:31,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:00:31,938 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:00:31,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:00:31,939 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:00:31,939 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:00:31,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:00:32,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:00:32,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:00:32,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:00:32,263 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:00:32,264 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:00:32,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-09-01 04:00:33,567 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:00:33,780 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:00:33,781 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2023-09-01 04:00:33,791 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8501b7952/b6cf4ae942d0405690efc7c5ffdf7ebd/FLAG5b134f530 [2023-09-01 04:00:33,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8501b7952/b6cf4ae942d0405690efc7c5ffdf7ebd [2023-09-01 04:00:33,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:00:33,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:00:33,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:00:33,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:00:33,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:00:33,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:00:33" (1/1) ... [2023-09-01 04:00:33,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157e25b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:33, skipping insertion in model container [2023-09-01 04:00:33,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:00:33" (1/1) ... [2023-09-01 04:00:33,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:00:33,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:00:33,994 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-three-array-min.wvr.c[2815,2828] [2023-09-01 04:00:34,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:00:34,014 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:00:34,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:00:34,033 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-three-array-min.wvr.c[2815,2828] [2023-09-01 04:00:34,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:00:34,046 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:00:34,066 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-three-array-min.wvr.c[2815,2828] [2023-09-01 04:00:34,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:00:34,079 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:00:34,080 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:00:34,085 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:00:34,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34 WrapperNode [2023-09-01 04:00:34,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:00:34,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:00:34,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:00:34,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:00:34,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,129 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 229 [2023-09-01 04:00:34,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:00:34,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:00:34,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:00:34,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:00:34,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:00:34,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:00:34,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:00:34,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:00:34,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (1/1) ... [2023-09-01 04:00:34,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:00:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:00:34,224 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 04:00:34,228 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 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:00:34,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:00:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:00:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 04:00:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:00:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:00:34,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:00:34,251 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 04:00:34,362 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:00:34,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:00:35,137 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:00:35,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:00:35,297 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 04:00:35,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:00:35 BoogieIcfgContainer [2023-09-01 04:00:35,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:00:35,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:00:35,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:00:35,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:00:35,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:00:33" (1/3) ... [2023-09-01 04:00:35,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73418919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:00:35, skipping insertion in model container [2023-09-01 04:00:35,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:00:34" (2/3) ... [2023-09-01 04:00:35,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73418919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:00:35, skipping insertion in model container [2023-09-01 04:00:35,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:00:35" (3/3) ... [2023-09-01 04:00:35,309 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2023-09-01 04:00:35,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:00:35,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-09-01 04:00:35,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:00:35,473 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 04:00:35,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 326 transitions, 676 flow [2023-09-01 04:00:35,651 INFO L130 PetriNetUnfolder]: 27/323 cut-off events. [2023-09-01 04:00:35,651 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 04:00:35,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 323 events. 27/323 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 428 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 04:00:35,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 326 transitions, 676 flow [2023-09-01 04:00:35,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 319 transitions, 656 flow [2023-09-01 04:00:35,672 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:00:35,684 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 302 places, 319 transitions, 656 flow [2023-09-01 04:00:35,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 302 places, 319 transitions, 656 flow [2023-09-01 04:00:35,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 319 transitions, 656 flow [2023-09-01 04:00:35,739 INFO L130 PetriNetUnfolder]: 27/319 cut-off events. [2023-09-01 04:00:35,739 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 04:00:35,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 319 events. 27/319 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 434 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 252. Up to 3 conditions per place. [2023-09-01 04:00:35,745 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2023-09-01 04:01:16,583 INFO L134 LiptonReduction]: Checked pairs total: 9038 [2023-09-01 04:01:16,583 INFO L136 LiptonReduction]: Total number of compositions: 375 [2023-09-01 04:01:16,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:01:16,599 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;@39eb4fcc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:01:16,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-09-01 04:01:16,603 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:01:16,603 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:01:16,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:16,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:16,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:16,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash 42350, now seen corresponding path program 1 times [2023-09-01 04:01:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:16,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754073537] [2023-09-01 04:01:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:16,625 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 04:01:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:16,627 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 04:01:16,631 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 04:01:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:01:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:16,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:01:16,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:01:17,031 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 04:01:17,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:17,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754073537] [2023-09-01 04:01:17,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754073537] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:17,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:17,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248843732] [2023-09-01 04:01:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:17,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-09-01 04:01:17,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 04:01:17,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:17,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-09-01 04:01:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:19,390 INFO L130 PetriNetUnfolder]: 9900/12210 cut-off events. [2023-09-01 04:01:19,391 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-09-01 04:01:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24567 conditions, 12210 events. 9900/12210 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53948 event pairs, 4614 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 22321. Up to 12128 conditions per place. [2023-09-01 04:01:19,477 INFO L137 encePairwiseOnDemand]: 686/701 looper letters, 64 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-09-01 04:01:19,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 296 flow [2023-09-01 04:01:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-09-01 04:01:19,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414170233000476 [2023-09-01 04:01:19,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-09-01 04:01:19,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-09-01 04:01:19,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:19,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-09-01 04:01:19,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 04:01:19,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:19,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:19,515 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 178 flow. Second operand 3 states and 913 transitions. [2023-09-01 04:01:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 296 flow [2023-09-01 04:01:19,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 04:01:19,524 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 163 flow [2023-09-01 04:01:19,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-09-01 04:01:19,529 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2023-09-01 04:01:19,529 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 163 flow [2023-09-01 04:01:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 04:01:19,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:19,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:19,541 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 (2)] Ended with exit code 0 [2023-09-01 04:01:19,740 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 04:01:19,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:19,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash 42349, now seen corresponding path program 1 times [2023-09-01 04:01:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:19,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062673608] [2023-09-01 04:01:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:19,742 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 04:01:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:19,748 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 04:01:19,750 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 04:01:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:19,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:01:19,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:19,886 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:01:19,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:01:19,905 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 04:01:19,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:19,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:19,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062673608] [2023-09-01 04:01:19,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062673608] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:19,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:19,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342613064] [2023-09-01 04:01:19,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:19,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:19,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:20,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 701 [2023-09-01 04:01:20,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 04:01:20,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:20,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 701 [2023-09-01 04:01:20,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:21,607 INFO L130 PetriNetUnfolder]: 9900/12206 cut-off events. [2023-09-01 04:01:21,608 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:01:21,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24424 conditions, 12206 events. 9900/12206 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 53927 event pairs, 4614 based on Foata normal form. 2/3122 useless extension candidates. Maximal degree in co-relation 24400. Up to 12125 conditions per place. [2023-09-01 04:01:21,694 INFO L137 encePairwiseOnDemand]: 697/701 looper letters, 62 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-09-01 04:01:21,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 283 flow [2023-09-01 04:01:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-09-01 04:01:21,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270090347123157 [2023-09-01 04:01:21,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-09-01 04:01:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-09-01 04:01:21,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:21,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-09-01 04:01:21,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 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 04:01:21,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:21,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:21,709 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 163 flow. Second operand 3 states and 898 transitions. [2023-09-01 04:01:21,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 283 flow [2023-09-01 04:01:21,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:21,713 INFO L231 Difference]: Finished difference. Result has 65 places, 68 transitions, 154 flow [2023-09-01 04:01:21,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=68} [2023-09-01 04:01:21,715 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2023-09-01 04:01:21,715 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 68 transitions, 154 flow [2023-09-01 04:01:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 04:01:21,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:21,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:01:21,732 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 04:01:21,931 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 04:01:21,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:21,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1317318, now seen corresponding path program 1 times [2023-09-01 04:01:21,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:21,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902779859] [2023-09-01 04:01:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:21,940 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 04:01:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:21,942 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 04:01:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:01:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:01:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:22,140 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:01:22,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:01:22,213 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 04:01:22,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:22,393 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 04:01:22,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902779859] [2023-09-01 04:01:22,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902779859] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:22,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:01:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877906873] [2023-09-01 04:01:22,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:01:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:01:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:01:23,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 701 [2023-09-01 04:01:23,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 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 04:01:23,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:23,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 701 [2023-09-01 04:01:23,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:25,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:01:28,951 INFO L130 PetriNetUnfolder]: 29713/36628 cut-off events. [2023-09-01 04:01:28,951 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 04:01:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73272 conditions, 36628 events. 29713/36628 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2618. Compared 181270 event pairs, 13842 based on Foata normal form. 0/9798 useless extension candidates. Maximal degree in co-relation 73264. Up to 12131 conditions per place. [2023-09-01 04:01:29,170 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2023-09-01 04:01:29,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 204 transitions, 848 flow [2023-09-01 04:01:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:01:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:01:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1788 transitions. [2023-09-01 04:01:29,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42510699001426533 [2023-09-01 04:01:29,176 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1788 transitions. [2023-09-01 04:01:29,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1788 transitions. [2023-09-01 04:01:29,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:29,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1788 transitions. [2023-09-01 04:01:29,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 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 04:01:29,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 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 04:01:29,192 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 701.0) internal successors, (4907), 7 states have internal predecessors, (4907), 0 states have call successors, (0), 0 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 04:01:29,192 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 154 flow. Second operand 6 states and 1788 transitions. [2023-09-01 04:01:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 204 transitions, 848 flow [2023-09-01 04:01:29,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 204 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:29,198 INFO L231 Difference]: Finished difference. Result has 74 places, 100 transitions, 427 flow [2023-09-01 04:01:29,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=74, PETRI_TRANSITIONS=100} [2023-09-01 04:01:29,200 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2023-09-01 04:01:29,200 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 100 transitions, 427 flow [2023-09-01 04:01:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 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 04:01:29,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:29,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:01:29,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:29,416 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 04:01:29,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:29,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 40874337, now seen corresponding path program 1 times [2023-09-01 04:01:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264005232] [2023-09-01 04:01:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:29,417 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 04:01:29,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:29,418 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 04:01:29,419 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 04:01:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:29,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:01:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:29,555 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 04:01:29,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:29,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264005232] [2023-09-01 04:01:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264005232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:29,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:29,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:01:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502835067] [2023-09-01 04:01:29,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:29,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 701 [2023-09-01 04:01:29,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 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 04:01:29,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:29,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 701 [2023-09-01 04:01:29,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:32,698 INFO L130 PetriNetUnfolder]: 29712/36627 cut-off events. [2023-09-01 04:01:32,698 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-09-01 04:01:32,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73400 conditions, 36627 events. 29712/36627 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 183085 event pairs, 13842 based on Foata normal form. 1/9379 useless extension candidates. Maximal degree in co-relation 73386. Up to 36384 conditions per place. [2023-09-01 04:01:32,916 INFO L137 encePairwiseOnDemand]: 698/701 looper letters, 92 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-09-01 04:01:32,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 611 flow [2023-09-01 04:01:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-09-01 04:01:32,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43081312410841655 [2023-09-01 04:01:32,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-09-01 04:01:32,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-09-01 04:01:32,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:32,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-09-01 04:01:32,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 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 04:01:32,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:32,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 701.0) internal successors, (2804), 4 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:01:32,928 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 427 flow. Second operand 3 states and 906 transitions. [2023-09-01 04:01:32,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 611 flow [2023-09-01 04:01:32,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 599 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-09-01 04:01:32,935 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 415 flow [2023-09-01 04:01:32,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-09-01 04:01:32,937 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-09-01 04:01:32,937 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 415 flow [2023-09-01 04:01:32,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 0 states have call successors, (0), 0 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 04:01:32,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:32,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:01:32,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:33,148 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 04:01:33,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:33,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1266118544, now seen corresponding path program 1 times [2023-09-01 04:01:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:33,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822286605] [2023-09-01 04:01:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:33,149 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 04:01:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:33,152 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 04:01:33,154 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 04:01:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 04:01:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:33,331 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 04:01:33,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:33,409 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 04:01:33,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:33,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822286605] [2023-09-01 04:01:33,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822286605] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:33,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:33,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-09-01 04:01:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832858281] [2023-09-01 04:01:33,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 04:01:33,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 04:01:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:01:33,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 701 [2023-09-01 04:01:33,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 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 04:01:33,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:33,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 701 [2023-09-01 04:01:33,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:39,787 INFO L130 PetriNetUnfolder]: 49514/61037 cut-off events. [2023-09-01 04:01:39,787 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 04:01:39,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122285 conditions, 61037 events. 49514/61037 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 4670. Compared 320135 event pairs, 23070 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 122269. Up to 36377 conditions per place. [2023-09-01 04:01:40,098 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 187 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2023-09-01 04:01:40,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 223 transitions, 1247 flow [2023-09-01 04:01:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 04:01:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 04:01:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2392 transitions. [2023-09-01 04:01:40,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42653352353780316 [2023-09-01 04:01:40,106 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2392 transitions. [2023-09-01 04:01:40,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2392 transitions. [2023-09-01 04:01:40,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:40,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2392 transitions. [2023-09-01 04:01:40,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.0) internal successors, (2392), 8 states have internal predecessors, (2392), 0 states have call successors, (0), 0 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 04:01:40,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 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 04:01:40,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 701.0) internal successors, (6309), 9 states have internal predecessors, (6309), 0 states have call successors, (0), 0 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 04:01:40,120 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 415 flow. Second operand 8 states and 2392 transitions. [2023-09-01 04:01:40,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 223 transitions, 1247 flow [2023-09-01 04:01:40,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:01:40,125 INFO L231 Difference]: Finished difference. Result has 86 places, 119 transitions, 713 flow [2023-09-01 04:01:40,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=86, PETRI_TRANSITIONS=119} [2023-09-01 04:01:40,126 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-09-01 04:01:40,126 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 119 transitions, 713 flow [2023-09-01 04:01:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.125) internal successors, (2193), 8 states have internal predecessors, (2193), 0 states have call successors, (0), 0 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 04:01:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:40,127 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:01:40,139 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 04:01:40,337 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 04:01:40,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:01:40,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 593951598, now seen corresponding path program 2 times [2023-09-01 04:01:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:40,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383684375] [2023-09-01 04:01:40,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:01:40,338 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 04:01:40,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:40,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:40,340 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 04:01:40,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:01:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:01:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:01:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:40,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:01:40,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:01:40,664 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 04:01:40,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:41,160 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 04:01:41,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383684375] [2023-09-01 04:01:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383684375] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:41,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:01:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582347749] [2023-09-01 04:01:41,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:01:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:41,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:01:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:01:47,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 701 [2023-09-01 04:01:47,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 713 flow. Second operand has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 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 04:01:47,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:47,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 701 [2023-09-01 04:01:47,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:50,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:01:52,785 WARN L539 Checker$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 04:01:53,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:01:55,869 WARN L539 Checker$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 04:01:57,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:01:59,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:01,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:03,015 WARN L539 Checker$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 04:02:04,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:06,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:10,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:11,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:13,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:15,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:32,185 INFO L130 PetriNetUnfolder]: 128680/158618 cut-off events. [2023-09-01 04:02:32,185 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-09-01 04:02:32,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317761 conditions, 158618 events. 128680/158618 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 8338. Compared 889121 event pairs, 59982 based on Foata normal form. 13/42996 useless extension candidates. Maximal degree in co-relation 317740. Up to 24235 conditions per place. [2023-09-01 04:02:33,149 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 525 selfloop transitions, 85 changer transitions 0/615 dead transitions. [2023-09-01 04:02:33,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 615 transitions, 3417 flow [2023-09-01 04:02:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 04:02:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 04:02:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5125 transitions. [2023-09-01 04:02:33,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300579004783083 [2023-09-01 04:02:33,167 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5125 transitions. [2023-09-01 04:02:33,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5125 transitions. [2023-09-01 04:02:33,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:33,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5125 transitions. [2023-09-01 04:02:33,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 301.47058823529414) internal successors, (5125), 17 states have internal predecessors, (5125), 0 states have call successors, (0), 0 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 04:02:33,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 701.0) internal successors, (12618), 18 states have internal predecessors, (12618), 0 states have call successors, (0), 0 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 04:02:33,201 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 701.0) internal successors, (12618), 18 states have internal predecessors, (12618), 0 states have call successors, (0), 0 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 04:02:33,201 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 713 flow. Second operand 17 states and 5125 transitions. [2023-09-01 04:02:33,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 615 transitions, 3417 flow [2023-09-01 04:02:33,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 615 transitions, 3417 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:02:33,214 INFO L231 Difference]: Finished difference. Result has 112 places, 170 transitions, 1339 flow [2023-09-01 04:02:33,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1339, PETRI_PLACES=112, PETRI_TRANSITIONS=170} [2023-09-01 04:02:33,217 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 31 predicate places. [2023-09-01 04:02:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 170 transitions, 1339 flow [2023-09-01 04:02:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 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 04:02:33,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:33,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:02:33,245 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 04:02:33,440 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 04:02:33,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:02:33,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115871, now seen corresponding path program 1 times [2023-09-01 04:02:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835293974] [2023-09-01 04:02:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:33,441 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 04:02:33,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:33,442 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 04:02:33,443 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 04:02:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 04:02:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:33,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:02:33,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:02:33,774 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:02:33,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:02:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:33,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:02:33,934 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:02:33,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:02:34,004 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 04:02:34,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 04:02:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:02:34,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:02:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:02:36,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835293974] [2023-09-01 04:02:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835293974] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:02:36,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:02:36,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 04:02:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719378025] [2023-09-01 04:02:36,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:02:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:02:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:02:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:02:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 701 [2023-09-01 04:02:39,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 170 transitions, 1339 flow. Second operand has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 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 04:02:39,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:39,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 701 [2023-09-01 04:02:39,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:51,871 WARN L222 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:02:57,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:02:59,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:01,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:04,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:06,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:08,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:03:10,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:12,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:14,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:03:54,703 INFO L130 PetriNetUnfolder]: 237548/292788 cut-off events. [2023-09-01 04:03:54,704 INFO L131 PetriNetUnfolder]: For 768/768 co-relation queries the response was YES. [2023-09-01 04:03:55,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586806 conditions, 292788 events. 237548/292788 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 12217. Compared 1729899 event pairs, 110736 based on Foata normal form. 3/79914 useless extension candidates. Maximal degree in co-relation 586773. Up to 72684 conditions per place. [2023-09-01 04:03:57,008 INFO L137 encePairwiseOnDemand]: 685/701 looper letters, 467 selfloop transitions, 153 changer transitions 0/625 dead transitions. [2023-09-01 04:03:57,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 625 transitions, 4272 flow [2023-09-01 04:03:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 04:03:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 04:03:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5766 transitions. [2023-09-01 04:03:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39168534746280825 [2023-09-01 04:03:57,025 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5766 transitions. [2023-09-01 04:03:57,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5766 transitions. [2023-09-01 04:03:57,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:57,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5766 transitions. [2023-09-01 04:03:57,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 274.57142857142856) internal successors, (5766), 21 states have internal predecessors, (5766), 0 states have call successors, (0), 0 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 04:03:57,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 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 04:03:57,060 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 701.0) internal successors, (15422), 22 states have internal predecessors, (15422), 0 states have call successors, (0), 0 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 04:03:57,060 INFO L175 Difference]: Start difference. First operand has 112 places, 170 transitions, 1339 flow. Second operand 21 states and 5766 transitions. [2023-09-01 04:03:57,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 625 transitions, 4272 flow [2023-09-01 04:03:57,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 625 transitions, 4047 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-09-01 04:03:57,077 INFO L231 Difference]: Finished difference. Result has 136 places, 239 transitions, 2288 flow [2023-09-01 04:03:57,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=701, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2288, PETRI_PLACES=136, PETRI_TRANSITIONS=239} [2023-09-01 04:03:57,078 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 55 predicate places. [2023-09-01 04:03:57,079 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 239 transitions, 2288 flow [2023-09-01 04:03:57,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.4) internal successors, (2504), 10 states have internal predecessors, (2504), 0 states have call successors, (0), 0 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 04:03:57,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:57,095 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 04:03:57,289 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 04:03:57,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-09-01 04:03:57,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:57,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1263115909, now seen corresponding path program 1 times [2023-09-01 04:03:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322036351] [2023-09-01 04:03:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:57,291 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 04:03:57,297 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 04:03:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:03:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:57,542 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2023-09-01 04:03:57,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 59 [2023-09-01 04:03:58,140 INFO L321 Elim1Store]: treesize reduction 48, result has 68.6 percent of original size [2023-09-01 04:03:58,141 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 66 treesize of output 163 [2023-09-01 04:04:10,130 INFO L321 Elim1Store]: treesize reduction 72, result has 75.1 percent of original size [2023-09-01 04:04:10,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 329 Killed by 15