./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-memsafety/list1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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 ../sv-benchmarks/c/pthread-memsafety/list1.i -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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 22:30:54,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 22:30:54,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 22:30:54,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 22:30:54,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 22:30:54,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 22:30:54,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 22:30:54,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 22:30:54,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 22:30:54,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 22:30:54,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 22:30:54,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 22:30:54,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 22:30:54,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 22:30:54,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 22:30:54,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 22:30:54,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 22:30:54,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 22:30:54,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 22:30:54,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 22:30:54,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 22:30:54,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 22:30:54,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 22:30:54,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 22:30:54,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 22:30:54,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 22:30:54,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 22:30:54,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 22:30:54,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 22:30:54,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 22:30:54,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 22:30:54,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 22:30:54,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 22:30:54,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 22:30:54,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 22:30:54,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 22:30:54,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 22:30:54,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 22:30:54,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 22:30:54,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 22:30:54,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 22:30:54,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 22:30:54,674 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 22:30:54,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 22:30:54,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 22:30:54,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 22:30:54,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 22:30:54,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 22:30:54,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 22:30:54,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 22:30:54,686 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 22:30:54,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 22:30:54,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 22:30:54,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 22:30:54,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 22:30:54,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 22:30:54,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 22:30:54,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 22:30:54,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 22:30:54,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 22:30:54,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 22:30:54,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:30:54,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 22:30:54,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 22:30:54,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 22:30:54,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 22:30:54,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 22:30:54,690 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 22:30:54,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 22:30:54,690 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 22:30:54,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2023-02-18 22:30:54,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 22:30:54,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 22:30:54,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 22:30:54,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 22:30:54,902 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 22:30:54,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-memsafety/list1.i [2023-02-18 22:30:55,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 22:30:56,067 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 22:30:56,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-memsafety/list1.i [2023-02-18 22:30:56,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798678e43/f775b6bee81e4f5d88876c52710e0547/FLAG11be16314 [2023-02-18 22:30:56,101 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798678e43/f775b6bee81e4f5d88876c52710e0547 [2023-02-18 22:30:56,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 22:30:56,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 22:30:56,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 22:30:56,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 22:30:56,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 22:30:56,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:30:56" (1/1) ... [2023-02-18 22:30:56,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e17e1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:30:56, skipping insertion in model container [2023-02-18 22:30:56,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:30:56" (1/1) ... [2023-02-18 22:30:56,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 22:30:56,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:30:56,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:30:56,479 ERROR L326 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) [2023-02-18 22:30:56,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5863c9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:30:56, skipping insertion in model container [2023-02-18 22:30:56,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 22:30:56,482 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-02-18 22:30:56,483 INFO L158 Benchmark]: Toolchain (without parser) took 378.11ms. Allocated memory is still 199.2MB. Free memory was 167.3MB in the beginning and 153.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 22:30:56,484 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 22:30:56,484 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.98ms. Allocated memory is still 199.2MB. Free memory was 167.3MB in the beginning and 153.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 22:30:56,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.98ms. Allocated memory is still 199.2MB. Free memory was 167.3MB in the beginning and 153.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1048]: 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 ../sv-benchmarks/c/pthread-memsafety/list1.i -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 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 22:30:57,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 22:30:57,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 22:30:58,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 22:30:58,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 22:30:58,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 22:30:58,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 22:30:58,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 22:30:58,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 22:30:58,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 22:30:58,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 22:30:58,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 22:30:58,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 22:30:58,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 22:30:58,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 22:30:58,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 22:30:58,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 22:30:58,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 22:30:58,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 22:30:58,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 22:30:58,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 22:30:58,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 22:30:58,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 22:30:58,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 22:30:58,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 22:30:58,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 22:30:58,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 22:30:58,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 22:30:58,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 22:30:58,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 22:30:58,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 22:30:58,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 22:30:58,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 22:30:58,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 22:30:58,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 22:30:58,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 22:30:58,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 22:30:58,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 22:30:58,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 22:30:58,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 22:30:58,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 22:30:58,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-02-18 22:30:58,054 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 22:30:58,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 22:30:58,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 22:30:58,055 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 22:30:58,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 22:30:58,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 22:30:58,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 22:30:58,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 22:30:58,056 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 22:30:58,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 22:30:58,056 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 22:30:58,057 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 22:30:58,058 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 22:30:58,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 22:30:58,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 22:30:58,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 22:30:58,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:30:58,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 22:30:58,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 22:30:58,059 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-18 22:30:58,060 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 22:30:58,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1da30149a66945688e686f90b0d1749d09e30bdcfdeae7b4325d99ddbe3a8206 [2023-02-18 22:30:58,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 22:30:58,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 22:30:58,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 22:30:58,407 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 22:30:58,407 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 22:30:58,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-memsafety/list1.i [2023-02-18 22:30:59,936 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 22:31:00,222 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 22:31:00,222 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-memsafety/list1.i [2023-02-18 22:31:00,236 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604bf9483/66e1660287dc43808d13505defa91adc/FLAGa82374329 [2023-02-18 22:31:00,248 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/604bf9483/66e1660287dc43808d13505defa91adc [2023-02-18 22:31:00,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 22:31:00,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 22:31:00,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 22:31:00,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 22:31:00,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 22:31:00,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5f99ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00, skipping insertion in model container [2023-02-18 22:31:00,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 22:31:00,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:31:00,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:31:00,605 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-02-18 22:31:00,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 22:31:00,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:31:00,654 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 22:31:00,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 22:31:00,750 INFO L208 MainTranslator]: Completed translation [2023-02-18 22:31:00,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00 WrapperNode [2023-02-18 22:31:00,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 22:31:00,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 22:31:00,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 22:31:00,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 22:31:00,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,799 INFO L138 Inliner]: procedures = 267, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-02-18 22:31:00,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 22:31:00,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 22:31:00,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 22:31:00,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 22:31:00,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 22:31:00,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 22:31:00,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 22:31:00,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 22:31:00,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (1/1) ... [2023-02-18 22:31:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 22:31:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 22:31:00,862 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) [2023-02-18 22:31:00,881 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 [2023-02-18 22:31:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-02-18 22:31:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 22:31:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 22:31:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure delete [2023-02-18 22:31:00,895 INFO L138 BoogieDeclarations]: Found implementation of procedure delete [2023-02-18 22:31:00,896 INFO L130 BoogieDeclarations]: Found specification of procedure build [2023-02-18 22:31:00,896 INFO L138 BoogieDeclarations]: Found implementation of procedure build [2023-02-18 22:31:00,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 22:31:00,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 22:31:00,897 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2023-02-18 22:31:00,995 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 22:31:00,997 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 22:31:01,295 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 22:31:01,300 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 22:31:01,300 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 22:31:01,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:31:01 BoogieIcfgContainer [2023-02-18 22:31:01,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 22:31:01,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 22:31:01,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 22:31:01,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 22:31:01,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:31:00" (1/3) ... [2023-02-18 22:31:01,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d5930f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:31:01, skipping insertion in model container [2023-02-18 22:31:01,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:31:00" (2/3) ... [2023-02-18 22:31:01,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d5930f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:31:01, skipping insertion in model container [2023-02-18 22:31:01,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:31:01" (3/3) ... [2023-02-18 22:31:01,307 INFO L112 eAbstractionObserver]: Analyzing ICFG list1.i [2023-02-18 22:31:01,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 22:31:01,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-02-18 22:31:01,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-02-18 22:31:01,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-02-18 22:31:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 151 transitions, 318 flow [2023-02-18 22:31:01,467 INFO L130 PetriNetUnfolder]: 6/149 cut-off events. [2023-02-18 22:31:01,468 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-02-18 22:31:01,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 6/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 373 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2023-02-18 22:31:01,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 151 transitions, 318 flow [2023-02-18 22:31:01,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 144 transitions, 300 flow [2023-02-18 22:31:01,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-02-18 22:31:01,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 144 transitions, 300 flow [2023-02-18 22:31:01,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 144 transitions, 300 flow [2023-02-18 22:31:01,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 144 transitions, 300 flow [2023-02-18 22:31:01,516 INFO L130 PetriNetUnfolder]: 6/144 cut-off events. [2023-02-18 22:31:01,520 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-02-18 22:31:01,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 144 events. 6/144 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 374 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 87. Up to 3 conditions per place. [2023-02-18 22:31:01,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 960 [2023-02-18 22:31:01,711 INFO L134 LiptonReduction]: Checked pairs total: 1645 [2023-02-18 22:31:01,712 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-02-18 22:31:01,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 22:31:01,737 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;@61757643, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 22:31:01,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2023-02-18 22:31:01,738 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-02-18 22:31:01,738 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-02-18 22:31:01,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:01,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2023-02-18 22:31:01,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 637, now seen corresponding path program 1 times [2023-02-18 22:31:01,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:01,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772325834] [2023-02-18 22:31:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:01,751 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 [2023-02-18 22:31:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:01,754 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) [2023-02-18 22:31:01,770 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 [2023-02-18 22:31:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 22:31:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:01,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:01,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772325834] [2023-02-18 22:31:01,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772325834] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:01,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:01,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-02-18 22:31:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747487820] [2023-02-18 22:31:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:01,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 22:31:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 22:31:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 22:31:01,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 333 [2023-02-18 22:31:01,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:01,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:01,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 333 [2023-02-18 22:31:01,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:02,081 INFO L130 PetriNetUnfolder]: 100/235 cut-off events. [2023-02-18 22:31:02,081 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-02-18 22:31:02,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 235 events. 100/235 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 968 event pairs, 84 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 261. Up to 228 conditions per place. [2023-02-18 22:31:02,084 INFO L137 encePairwiseOnDemand]: 322/333 looper letters, 47 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-02-18 22:31:02,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 204 flow [2023-02-18 22:31:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 22:31:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-02-18 22:31:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 348 transitions. [2023-02-18 22:31:02,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2023-02-18 22:31:02,099 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 348 transitions. [2023-02-18 22:31:02,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 348 transitions. [2023-02-18 22:31:02,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:02,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 348 transitions. [2023-02-18 22:31:02,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,112 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,113 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 132 flow. Second operand 2 states and 348 transitions. [2023-02-18 22:31:02,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 204 flow [2023-02-18 22:31:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 196 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-02-18 22:31:02,117 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 102 flow [2023-02-18 22:31:02,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-02-18 22:31:02,122 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -13 predicate places. [2023-02-18 22:31:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 102 flow [2023-02-18 22:31:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:02,124 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-02-18 22:31:02,131 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 [2023-02-18 22:31:02,331 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 [2023-02-18 22:31:02,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 627788, now seen corresponding path program 1 times [2023-02-18 22:31:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128761766] [2023-02-18 22:31:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:02,333 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 [2023-02-18 22:31:02,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:02,335 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) [2023-02-18 22:31:02,338 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 [2023-02-18 22:31:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 22:31:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:02,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:02,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128761766] [2023-02-18 22:31:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128761766] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:02,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:02,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 22:31:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957032161] [2023-02-18 22:31:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:31:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:31:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:31:02,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-02-18 22:31:02,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:02,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-02-18 22:31:02,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:02,703 INFO L130 PetriNetUnfolder]: 86/206 cut-off events. [2023-02-18 22:31:02,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-02-18 22:31:02,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 206 events. 86/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 846 event pairs, 72 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 408. Up to 199 conditions per place. [2023-02-18 22:31:02,705 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-02-18 22:31:02,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 192 flow [2023-02-18 22:31:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:31:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-02-18 22:31:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-02-18 22:31:02,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4674674674674675 [2023-02-18 22:31:02,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-02-18 22:31:02,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-02-18 22:31:02,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:02,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-02-18 22:31:02,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,723 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 102 flow. Second operand 3 states and 467 transitions. [2023-02-18 22:31:02,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 192 flow [2023-02-18 22:31:02,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-02-18 22:31:02,724 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 104 flow [2023-02-18 22:31:02,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-02-18 22:31:02,725 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-02-18 22:31:02,725 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 104 flow [2023-02-18 22:31:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:02,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:02,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-02-18 22:31:02,735 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 [2023-02-18 22:31:02,933 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 [2023-02-18 22:31:02,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash 627787, now seen corresponding path program 1 times [2023-02-18 22:31:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:02,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157774809] [2023-02-18 22:31:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:02,935 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 [2023-02-18 22:31:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:02,961 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) [2023-02-18 22:31:02,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-18 22:31:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 22:31:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:03,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:03,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157774809] [2023-02-18 22:31:03,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157774809] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:03,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:03,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 22:31:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840468031] [2023-02-18 22:31:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:31:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:31:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:31:03,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 333 [2023-02-18 22:31:03,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:03,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 333 [2023-02-18 22:31:03,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:03,269 INFO L130 PetriNetUnfolder]: 91/221 cut-off events. [2023-02-18 22:31:03,269 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-02-18 22:31:03,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 221 events. 91/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 947 event pairs, 48 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 443. Up to 136 conditions per place. [2023-02-18 22:31:03,270 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 49 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2023-02-18 22:31:03,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 239 flow [2023-02-18 22:31:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:31:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-02-18 22:31:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-02-18 22:31:03,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-02-18 22:31:03,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-02-18 22:31:03,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-02-18 22:31:03,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:03,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-02-18 22:31:03,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,275 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 104 flow. Second operand 3 states and 456 transitions. [2023-02-18 22:31:03,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 239 flow [2023-02-18 22:31:03,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:03,277 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 127 flow [2023-02-18 22:31:03,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-02-18 22:31:03,278 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-02-18 22:31:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 127 flow [2023-02-18 22:31:03,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:03,278 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-02-18 22:31:03,299 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 [2023-02-18 22:31:03,485 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 [2023-02-18 22:31:03,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 19460969, now seen corresponding path program 1 times [2023-02-18 22:31:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699947996] [2023-02-18 22:31:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:03,487 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 [2023-02-18 22:31:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:03,488 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) [2023-02-18 22:31:03,494 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 [2023-02-18 22:31:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:03,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 22:31:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:03,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:03,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:03,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699947996] [2023-02-18 22:31:03,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699947996] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:03,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:31:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540562409] [2023-02-18 22:31:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:31:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:31:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:31:03,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-02-18 22:31:03,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:03,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-02-18 22:31:03,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:03,856 INFO L130 PetriNetUnfolder]: 90/218 cut-off events. [2023-02-18 22:31:03,856 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-02-18 22:31:03,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 218 events. 90/218 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 954 event pairs, 36 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 482. Up to 130 conditions per place. [2023-02-18 22:31:03,857 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 49 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2023-02-18 22:31:03,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 258 flow [2023-02-18 22:31:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:31:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-02-18 22:31:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-02-18 22:31:03,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2023-02-18 22:31:03,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-02-18 22:31:03,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-02-18 22:31:03,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:03,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-02-18 22:31:03,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,869 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 127 flow. Second operand 3 states and 474 transitions. [2023-02-18 22:31:03,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 258 flow [2023-02-18 22:31:03,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-02-18 22:31:03,871 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 132 flow [2023-02-18 22:31:03,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-02-18 22:31:03,871 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-02-18 22:31:03,872 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 132 flow [2023-02-18 22:31:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:03,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:03,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-02-18 22:31:03,880 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 [2023-02-18 22:31:04,080 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 [2023-02-18 22:31:04,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash 19460968, now seen corresponding path program 1 times [2023-02-18 22:31:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:04,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39325031] [2023-02-18 22:31:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:04,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 22:31:04,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:04,082 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) [2023-02-18 22:31:04,083 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 [2023-02-18 22:31:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 22:31:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:04,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:04,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:04,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:04,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:04,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39325031] [2023-02-18 22:31:04,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39325031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:04,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:04,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:31:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360571862] [2023-02-18 22:31:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:31:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:31:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:31:04,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-02-18 22:31:04,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:04,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:04,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-02-18 22:31:04,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:04,499 INFO L130 PetriNetUnfolder]: 89/215 cut-off events. [2023-02-18 22:31:04,499 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-02-18 22:31:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 215 events. 89/215 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 933 event pairs, 39 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 478. Up to 134 conditions per place. [2023-02-18 22:31:04,500 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 49 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-02-18 22:31:04,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 261 flow [2023-02-18 22:31:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:31:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-02-18 22:31:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-02-18 22:31:04,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47347347347347346 [2023-02-18 22:31:04,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-02-18 22:31:04,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-02-18 22:31:04,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:04,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-02-18 22:31:04,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:04,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:04,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:04,505 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 132 flow. Second operand 3 states and 473 transitions. [2023-02-18 22:31:04,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 261 flow [2023-02-18 22:31:04,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:04,507 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2023-02-18 22:31:04,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-02-18 22:31:04,507 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -13 predicate places. [2023-02-18 22:31:04,508 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2023-02-18 22:31:04,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:04,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:04,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 22:31:04,518 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 [2023-02-18 22:31:04,715 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 [2023-02-18 22:31:04,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 603291194, now seen corresponding path program 1 times [2023-02-18 22:31:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891913456] [2023-02-18 22:31:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:04,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 22:31:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:04,718 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) [2023-02-18 22:31:04,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-18 22:31:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 22:31:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:04,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:04,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891913456] [2023-02-18 22:31:04,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891913456] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:04,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:04,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 22:31:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579935652] [2023-02-18 22:31:04,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 22:31:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 22:31:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 22:31:05,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-02-18 22:31:05,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:05,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-02-18 22:31:05,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:05,395 INFO L130 PetriNetUnfolder]: 100/248 cut-off events. [2023-02-18 22:31:05,395 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-02-18 22:31:05,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 248 events. 100/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1101 event pairs, 75 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 533. Up to 207 conditions per place. [2023-02-18 22:31:05,396 INFO L137 encePairwiseOnDemand]: 322/333 looper letters, 48 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2023-02-18 22:31:05,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 266 flow [2023-02-18 22:31:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 22:31:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-02-18 22:31:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-02-18 22:31:05,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4302874302874303 [2023-02-18 22:31:05,399 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-02-18 22:31:05,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-02-18 22:31:05,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:05,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-02-18 22:31:05,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,405 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,405 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 7 states and 1003 transitions. [2023-02-18 22:31:05,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 266 flow [2023-02-18 22:31:05,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:05,406 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 173 flow [2023-02-18 22:31:05,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-02-18 22:31:05,407 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2023-02-18 22:31:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 173 flow [2023-02-18 22:31:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:05,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:31:05,422 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 [2023-02-18 22:31:05,615 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 [2023-02-18 22:31:05,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting buildErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash -57764153, now seen corresponding path program 1 times [2023-02-18 22:31:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:05,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442936773] [2023-02-18 22:31:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:05,617 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 [2023-02-18 22:31:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:05,618 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) [2023-02-18 22:31:05,620 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 [2023-02-18 22:31:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 22:31:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:05,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:05,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 22:31:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:05,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:05,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442936773] [2023-02-18 22:31:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442936773] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:05,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:05,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 22:31:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362233408] [2023-02-18 22:31:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 22:31:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 22:31:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 22:31:05,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-02-18 22:31:05,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:05,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:05,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-02-18 22:31:05,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:06,035 INFO L130 PetriNetUnfolder]: 100/242 cut-off events. [2023-02-18 22:31:06,035 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-02-18 22:31:06,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 242 events. 100/242 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1050 event pairs, 37 based on Foata normal form. 6/120 useless extension candidates. Maximal degree in co-relation 556. Up to 149 conditions per place. [2023-02-18 22:31:06,037 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 54 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-02-18 22:31:06,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 314 flow [2023-02-18 22:31:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 22:31:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-02-18 22:31:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-02-18 22:31:06,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44744744744744747 [2023-02-18 22:31:06,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-02-18 22:31:06,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-02-18 22:31:06,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:06,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-02-18 22:31:06,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,042 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 173 flow. Second operand 3 states and 447 transitions. [2023-02-18 22:31:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 314 flow [2023-02-18 22:31:06,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:06,043 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 182 flow [2023-02-18 22:31:06,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-02-18 22:31:06,044 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-02-18 22:31:06,044 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 182 flow [2023-02-18 22:31:06,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:06,045 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:31:06,062 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 [2023-02-18 22:31:06,252 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 [2023-02-18 22:31:06,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting buildErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -57763943, now seen corresponding path program 1 times [2023-02-18 22:31:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826872025] [2023-02-18 22:31:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:06,254 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 [2023-02-18 22:31:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:06,255 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) [2023-02-18 22:31:06,257 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 [2023-02-18 22:31:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 22:31:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:06,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:31:06,390 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 [2023-02-18 22:31:06,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:06,393 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 11 treesize of output 15 [2023-02-18 22:31:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:06,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:06,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826872025] [2023-02-18 22:31:06,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826872025] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:06,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:06,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 22:31:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419439663] [2023-02-18 22:31:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 22:31:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 22:31:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 22:31:06,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 333 [2023-02-18 22:31:06,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:06,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 333 [2023-02-18 22:31:06,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:06,922 INFO L130 PetriNetUnfolder]: 92/226 cut-off events. [2023-02-18 22:31:06,922 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-02-18 22:31:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 226 events. 92/226 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 960 event pairs, 36 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 530. Up to 127 conditions per place. [2023-02-18 22:31:06,924 INFO L137 encePairwiseOnDemand]: 319/333 looper letters, 45 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-02-18 22:31:06,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 307 flow [2023-02-18 22:31:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 22:31:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-02-18 22:31:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2023-02-18 22:31:06,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42242242242242245 [2023-02-18 22:31:06,926 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2023-02-18 22:31:06,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2023-02-18 22:31:06,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:06,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2023-02-18 22:31:06,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,931 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 182 flow. Second operand 6 states and 844 transitions. [2023-02-18 22:31:06,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 307 flow [2023-02-18 22:31:06,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:06,932 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 178 flow [2023-02-18 22:31:06,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-02-18 22:31:06,933 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2023-02-18 22:31:06,933 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 178 flow [2023-02-18 22:31:06,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:06,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:06,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:31:06,959 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 (9)] Ended with exit code 0 [2023-02-18 22:31:07,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 22:31:07,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting buildErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:07,142 INFO L85 PathProgramCache]: Analyzing trace with hash -57764152, now seen corresponding path program 1 times [2023-02-18 22:31:07,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:07,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225021403] [2023-02-18 22:31:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:07,143 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 [2023-02-18 22:31:07,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:07,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 22:31:07,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-18 22:31:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 22:31:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:07,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:07,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:31:07,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:31:07,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:07,272 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 11 treesize of output 15 [2023-02-18 22:31:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:07,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 22:31:07,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225021403] [2023-02-18 22:31:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225021403] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 22:31:07,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 22:31:07,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 22:31:07,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219705747] [2023-02-18 22:31:07,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 22:31:07,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 22:31:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 22:31:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 22:31:07,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 333 [2023-02-18 22:31:07,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:07,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:07,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 333 [2023-02-18 22:31:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:07,649 INFO L130 PetriNetUnfolder]: 92/220 cut-off events. [2023-02-18 22:31:07,650 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-02-18 22:31:07,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 220 events. 92/220 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 932 event pairs, 37 based on Foata normal form. 6/104 useless extension candidates. Maximal degree in co-relation 538. Up to 133 conditions per place. [2023-02-18 22:31:07,651 INFO L137 encePairwiseOnDemand]: 325/333 looper letters, 50 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2023-02-18 22:31:07,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 311 flow [2023-02-18 22:31:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 22:31:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-02-18 22:31:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2023-02-18 22:31:07,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41066066066066065 [2023-02-18 22:31:07,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2023-02-18 22:31:07,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2023-02-18 22:31:07,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:07,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2023-02-18 22:31:07,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:07,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:07,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:07,655 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 178 flow. Second operand 4 states and 547 transitions. [2023-02-18 22:31:07,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 311 flow [2023-02-18 22:31:07,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 290 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-02-18 22:31:07,657 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2023-02-18 22:31:07,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-02-18 22:31:07,658 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -9 predicate places. [2023-02-18 22:31:07,658 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2023-02-18 22:31:07,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:07,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:07,658 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:31:07,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-02-18 22:31:07,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 22:31:07,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting buildErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1435990122, now seen corresponding path program 1 times [2023-02-18 22:31:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918544019] [2023-02-18 22:31:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:07,867 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 [2023-02-18 22:31:07,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:07,868 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 22:31:07,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-18 22:31:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:08,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 22:31:08,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:08,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:08,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:31:08,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:08,045 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 44 [2023-02-18 22:31:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:08,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:31:08,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-18 22:31:08,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:08,111 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 74 treesize of output 76 [2023-02-18 22:31:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:08,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 22:31:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918544019] [2023-02-18 22:31:08,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918544019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 22:31:08,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 22:31:08,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-02-18 22:31:08,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080335563] [2023-02-18 22:31:08,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 22:31:08,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 22:31:08,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 22:31:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 22:31:08,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 22:31:10,214 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] [2023-02-18 22:31:10,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 333 [2023-02-18 22:31:10,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 9 states, 9 states have (on average 107.66666666666667) internal successors, (969), 9 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:10,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-02-18 22:31:10,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 333 [2023-02-18 22:31:10,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-02-18 22:31:11,170 INFO L130 PetriNetUnfolder]: 91/217 cut-off events. [2023-02-18 22:31:11,170 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-02-18 22:31:11,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 217 events. 91/217 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 919 event pairs, 37 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 539. Up to 106 conditions per place. [2023-02-18 22:31:11,172 INFO L137 encePairwiseOnDemand]: 321/333 looper letters, 46 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2023-02-18 22:31:11,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 58 transitions, 305 flow [2023-02-18 22:31:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 22:31:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-02-18 22:31:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-02-18 22:31:11,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35315315315315315 [2023-02-18 22:31:11,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-02-18 22:31:11,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-02-18 22:31:11,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-18 22:31:11,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-02-18 22:31:11,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:11,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:11,177 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:11,177 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 5 states and 588 transitions. [2023-02-18 22:31:11,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 58 transitions, 305 flow [2023-02-18 22:31:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-02-18 22:31:11,178 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 180 flow [2023-02-18 22:31:11,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-02-18 22:31:11,179 INFO L288 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2023-02-18 22:31:11,179 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 180 flow [2023-02-18 22:31:11,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.66666666666667) internal successors, (969), 9 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 22:31:11,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2023-02-18 22:31:11,180 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 22:31:11,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-02-18 22:31:11,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 22:31:11,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting buildErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [buildErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, buildErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 66 more)] === [2023-02-18 22:31:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 22:31:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1435990123, now seen corresponding path program 1 times [2023-02-18 22:31:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 22:31:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934695511] [2023-02-18 22:31:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 22:31:11,390 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 [2023-02-18 22:31:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 22:31:11,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 22:31:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-02-18 22:31:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 22:31:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 22:31:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 22:31:11,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:11,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 22:31:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:31:11,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-18 22:31:11,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:11,570 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 11 treesize of output 15 [2023-02-18 22:31:11,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:31:11,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 22:31:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 22:31:11,595 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 16 treesize of output 18 [2023-02-18 22:31:11,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:11,598 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 15 treesize of output 19 [2023-02-18 22:31:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 22:31:11,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 22:31:11,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2023-02-18 22:31:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-02-18 22:31:11,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-02-18 22:31:11,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-02-18 22:31:14,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 22:31:14,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 59 select indices, 59 select index equivalence classes, 0 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 1711 case distinctions, treesize of input 1640 treesize of output 15210