./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:52:56,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:52:56,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:52:56,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:52:56,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:52:56,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:52:56,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:52:56,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:52:56,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:52:56,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:52:56,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:52:56,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:52:56,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:52:56,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:52:56,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:52:56,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:52:56,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:52:56,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:52:56,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:52:56,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:52:56,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:52:56,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:52:56,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:52:56,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:52:56,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:52:56,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:52:56,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:52:56,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:52:56,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:52:56,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:52:56,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:52:56,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:52:56,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:52:56,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:52:56,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:52:56,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:52:56,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:52:56,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:52:56,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:52:56,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:52:56,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:52:56,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:52:56,894 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:52:56,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:52:56,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:52:56,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:52:56,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:52:56,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:52:56,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:52:56,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:52:56,898 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:52:56,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:52:56,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:52:56,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:52:56,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:52:56,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:52:56,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:52:56,900 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:52:56,900 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:52:56,900 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:52:56,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:52:56,901 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:52:56,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:52:56,901 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:52:56,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:52:56,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:52:56,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:52:56,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:52:56,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:52:56,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:52:56,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:52:56,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:52:56,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:52:56,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:52:56,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:52:56,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:52:56,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:52:57,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:52:57,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:52:57,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:52:57,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:52:57,207 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:52:57,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-08-29 22:52:58,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:52:58,596 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:52:58,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-08-29 22:52:58,611 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2438af7af/e99962d9d1b94bee94e806d44bfbb68c/FLAGfd181eefe [2023-08-29 22:52:58,634 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2438af7af/e99962d9d1b94bee94e806d44bfbb68c [2023-08-29 22:52:58,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:52:58,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:52:58,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:58,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:52:58,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:52:58,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:58" (1/1) ... [2023-08-29 22:52:58,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b4ceeb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:58, skipping insertion in model container [2023-08-29 22:52:58,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:52:58" (1/1) ... [2023-08-29 22:52:58,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:52:58,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:52:58,880 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c[3945,3958] [2023-08-29 22:52:58,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:52:58,926 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:52:58,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6371716a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:52:58, skipping insertion in model container [2023-08-29 22:52:58,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:52:58,929 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:52:58,930 INFO L158 Benchmark]: Toolchain (without parser) took 291.44ms. Allocated memory is still 73.4MB. Free memory was 45.3MB in the beginning and 34.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:52:58,931 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:52:58,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.33ms. Allocated memory is still 73.4MB. Free memory was 45.1MB in the beginning and 34.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:52:58,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 73.4MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.33ms. Allocated memory is still 73.4MB. Free memory was 45.1MB in the beginning and 34.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:53:00,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:53:00,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:53:00,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:53:00,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:53:00,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:53:00,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:53:00,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:53:00,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:53:00,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:53:00,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:53:00,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:53:00,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:53:00,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:53:00,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:53:00,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:53:00,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:53:00,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:53:00,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:53:00,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:53:00,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:53:00,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:53:00,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:53:00,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:53:00,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:53:00,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:53:00,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:53:00,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:53:00,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:53:00,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:53:00,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:53:00,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:53:00,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:53:00,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:53:00,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:53:00,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:53:00,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:53:00,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:53:00,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:53:00,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:53:00,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:53:00,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:53:00,806 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:53:00,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:53:00,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:53:00,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:53:00,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:53:00,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:53:00,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:53:00,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:53:00,809 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:53:00,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:53:00,810 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:53:00,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:53:00,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:53:00,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:53:00,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:53:00,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:53:00,812 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:53:00,813 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:53:00,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:53:00,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:53:00,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:53:00,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:53:00,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:53:00,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:53:00,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:53:00,814 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:53:00,814 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:53:00,815 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:53:00,815 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:53:00,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:53:00,815 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:53:00,815 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:53:00,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:53:01,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:53:01,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:53:01,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:53:01,113 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:53:01,113 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:53:01,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-08-29 22:53:02,203 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:53:02,438 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:53:02,439 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c [2023-08-29 22:53:02,445 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9f8da90/7bd8077e5a6a4cb89899554318900661/FLAGd7129013a [2023-08-29 22:53:02,456 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9f8da90/7bd8077e5a6a4cb89899554318900661 [2023-08-29 22:53:02,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:53:02,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:53:02,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:53:02,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:53:02,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:53:02,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b95ce50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02, skipping insertion in model container [2023-08-29 22:53:02,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:53:02,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:53:02,643 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c[3945,3958] [2023-08-29 22:53:02,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:53:02,696 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:53:02,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:53:02,747 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c[3945,3958] [2023-08-29 22:53:02,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:53:02,765 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:53:02,794 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-trans.wvr.c[3945,3958] [2023-08-29 22:53:02,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:53:02,813 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:53:02,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02 WrapperNode [2023-08-29 22:53:02,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:53:02,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:53:02,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:53:02,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:53:02,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,893 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 413 [2023-08-29 22:53:02,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:53:02,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:53:02,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:53:02,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:53:02,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:53:02,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:53:02,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:53:02,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:53:02,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (1/1) ... [2023-08-29 22:53:02,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:53:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:53:03,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:53:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:53:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:53:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-08-29 22:53:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:53:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:53:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:53:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:53:03,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:53:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:53:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:53:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:53:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:53:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:53:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:53:03,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:53:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-08-29 22:53:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:53:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:53:03,062 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:53:03,248 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:53:03,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:53:04,288 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:53:04,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:53:04,299 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:53:04,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:53:04 BoogieIcfgContainer [2023-08-29 22:53:04,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:53:04,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:53:04,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:53:04,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:53:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:53:02" (1/3) ... [2023-08-29 22:53:04,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b73ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:53:04, skipping insertion in model container [2023-08-29 22:53:04,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:53:02" (2/3) ... [2023-08-29 22:53:04,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b73ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:53:04, skipping insertion in model container [2023-08-29 22:53:04,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:53:04" (3/3) ... [2023-08-29 22:53:04,308 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2023-08-29 22:53:04,322 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:53:04,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-08-29 22:53:04,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:53:04,490 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:53:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 547 transitions, 1118 flow [2023-08-29 22:53:04,749 INFO L130 PetriNetUnfolder]: 41/544 cut-off events. [2023-08-29 22:53:04,749 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:53:04,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 544 events. 41/544 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1006 event pairs, 0 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-08-29 22:53:04,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 547 transitions, 1118 flow [2023-08-29 22:53:04,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 509 places, 540 transitions, 1098 flow [2023-08-29 22:53:04,777 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:53:04,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 509 places, 540 transitions, 1098 flow [2023-08-29 22:53:04,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 509 places, 540 transitions, 1098 flow [2023-08-29 22:53:04,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 509 places, 540 transitions, 1098 flow [2023-08-29 22:53:04,886 INFO L130 PetriNetUnfolder]: 41/540 cut-off events. [2023-08-29 22:53:04,886 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:53:04,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 540 events. 41/540 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 450. Up to 2 conditions per place. [2023-08-29 22:53:04,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 27258 [2023-08-29 22:54:04,630 INFO L134 LiptonReduction]: Checked pairs total: 51998 [2023-08-29 22:54:04,631 INFO L136 LiptonReduction]: Total number of compositions: 662 [2023-08-29 22:54:04,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:54:04,648 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;@695849fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:54:04,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-08-29 22:54:04,651 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:54:04,651 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:54:04,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:04,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:54:04,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:04,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 68331, now seen corresponding path program 1 times [2023-08-29 22:54:04,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:04,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911297691] [2023-08-29 22:54:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:04,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:04,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:54:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:54:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:04,925 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-29 22:54:04,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-29 22:54:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:04,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:04,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911297691] [2023-08-29 22:54:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911297691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:04,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:54:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786897665] [2023-08-29 22:54:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:05,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:54:05,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:54:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:54:05,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-08-29 22:54:05,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:05,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:05,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-08-29 22:54:05,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:10,668 INFO L130 PetriNetUnfolder]: 28355/39551 cut-off events. [2023-08-29 22:54:10,669 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2023-08-29 22:54:10,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79738 conditions, 39551 events. 28355/39551 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242780 event pairs, 26445 based on Foata normal form. 0/12074 useless extension candidates. Maximal degree in co-relation 76220. Up to 39423 conditions per place. [2023-08-29 22:54:10,892 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-08-29 22:54:10,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 382 flow [2023-08-29 22:54:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:54:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:54:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1585 transitions. [2023-08-29 22:54:10,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700027570995315 [2023-08-29 22:54:10,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1585 transitions. [2023-08-29 22:54:10,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1585 transitions. [2023-08-29 22:54:10,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:10,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1585 transitions. [2023-08-29 22:54:10,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.3333333333334) internal successors, (1585), 3 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:10,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:10,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:10,943 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 224 flow. Second operand 3 states and 1585 transitions. [2023-08-29 22:54:10,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 382 flow [2023-08-29 22:54:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 370 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:54:10,962 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 196 flow [2023-08-29 22:54:10,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-08-29 22:54:10,968 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2023-08-29 22:54:10,968 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 196 flow [2023-08-29 22:54:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 496.6666666666667) internal successors, (1490), 3 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:54:10,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:11,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:11,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:11,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 68332, now seen corresponding path program 1 times [2023-08-29 22:54:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650586011] [2023-08-29 22:54:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:11,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:11,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:54:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:54:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:11,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:54:11,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:54:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:11,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:11,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650586011] [2023-08-29 22:54:11,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650586011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:11,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:11,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:54:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332401954] [2023-08-29 22:54:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:11,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:54:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:54:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:54:11,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1209 [2023-08-29 22:54:11,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:11,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:11,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1209 [2023-08-29 22:54:11,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:15,948 INFO L130 PetriNetUnfolder]: 28358/39557 cut-off events. [2023-08-29 22:54:15,948 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-29 22:54:16,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79297 conditions, 39557 events. 28358/39557 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242760 event pairs, 26445 based on Foata normal form. 0/12077 useless extension candidates. Maximal degree in co-relation 79291. Up to 39425 conditions per place. [2023-08-29 22:54:16,166 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 87 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-08-29 22:54:16,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 396 flow [2023-08-29 22:54:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:54:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:54:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-08-29 22:54:16,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-08-29 22:54:16,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-08-29 22:54:16,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-08-29 22:54:16,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:16,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-08-29 22:54:16,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,185 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 196 flow. Second operand 3 states and 1576 transitions. [2023-08-29 22:54:16,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 396 flow [2023-08-29 22:54:16,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 100 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:16,189 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 253 flow [2023-08-29 22:54:16,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2023-08-29 22:54:16,190 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2023-08-29 22:54:16,190 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 253 flow [2023-08-29 22:54:16,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:16,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:16,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:54:16,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:16,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:16,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2127197, now seen corresponding path program 1 times [2023-08-29 22:54:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:16,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171507982] [2023-08-29 22:54:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:16,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:16,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:54:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:54:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:16,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:54:16,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:54:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:16,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:16,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171507982] [2023-08-29 22:54:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171507982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:16,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:54:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107962714] [2023-08-29 22:54:16,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:16,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:54:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:54:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:54:18,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 478 out of 1209 [2023-08-29 22:54:18,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:18,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:18,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 478 of 1209 [2023-08-29 22:54:18,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:24,229 INFO L130 PetriNetUnfolder]: 28367/39575 cut-off events. [2023-08-29 22:54:24,229 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-29 22:54:24,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79381 conditions, 39575 events. 28367/39575 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 242729 event pairs, 26445 based on Foata normal form. 0/12096 useless extension candidates. Maximal degree in co-relation 79372. Up to 39420 conditions per place. [2023-08-29 22:54:24,459 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2023-08-29 22:54:24,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 118 transitions, 561 flow [2023-08-29 22:54:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:54:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:54:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2989 transitions. [2023-08-29 22:54:24,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204852495175076 [2023-08-29 22:54:24,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2989 transitions. [2023-08-29 22:54:24,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2989 transitions. [2023-08-29 22:54:24,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:24,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2989 transitions. [2023-08-29 22:54:24,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 498.1666666666667) internal successors, (2989), 6 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:24,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:24,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1209.0) internal successors, (8463), 7 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:24,491 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 253 flow. Second operand 6 states and 2989 transitions. [2023-08-29 22:54:24,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 118 transitions, 561 flow [2023-08-29 22:54:24,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:54:24,500 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 420 flow [2023-08-29 22:54:24,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-08-29 22:54:24,502 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2023-08-29 22:54:24,502 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 420 flow [2023-08-29 22:54:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:24,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:24,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:54:24,518 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 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:24,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:24,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:24,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759497, now seen corresponding path program 1 times [2023-08-29 22:54:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862512645] [2023-08-29 22:54:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:24,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:24,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:54:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:54:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:24,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-29 22:54:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:24,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:24,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:24,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862512645] [2023-08-29 22:54:24,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862512645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:24,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:54:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642821990] [2023-08-29 22:54:24,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:24,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:54:24,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:54:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:54:25,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1209 [2023-08-29 22:54:25,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:25,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:25,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1209 [2023-08-29 22:54:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:29,177 INFO L130 PetriNetUnfolder]: 28367/39572 cut-off events. [2023-08-29 22:54:29,178 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-08-29 22:54:29,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79422 conditions, 39572 events. 28367/39572 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242802 event pairs, 26445 based on Foata normal form. 0/12100 useless extension candidates. Maximal degree in co-relation 79410. Up to 39415 conditions per place. [2023-08-29 22:54:29,378 INFO L137 encePairwiseOnDemand]: 1205/1209 looper letters, 104 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-08-29 22:54:29,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 632 flow [2023-08-29 22:54:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:54:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:54:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-08-29 22:54:29,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43451888613178935 [2023-08-29 22:54:29,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-08-29 22:54:29,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-08-29 22:54:29,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:29,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-08-29 22:54:29,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:29,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:29,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:29,396 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 420 flow. Second operand 3 states and 1576 transitions. [2023-08-29 22:54:29,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 632 flow [2023-08-29 22:54:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 115 transitions, 595 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:29,403 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 387 flow [2023-08-29 22:54:29,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-08-29 22:54:29,406 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:54:29,406 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 387 flow [2023-08-29 22:54:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 497.6666666666667) internal successors, (1493), 3 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:29,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:29,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:54:29,420 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 [2023-08-29 22:54:29,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:29,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:29,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2046759495, now seen corresponding path program 1 times [2023-08-29 22:54:29,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:29,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024960760] [2023-08-29 22:54:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:54:29,617 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 [2023-08-29 22:54:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:29,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:29,620 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 (6)] Waiting until timeout for monitored process [2023-08-29 22:54:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:54:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:54:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:29,766 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 [2023-08-29 22:54:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:29,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:54:29,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024960760] [2023-08-29 22:54:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024960760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:54:29,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:54:29,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:54:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791137512] [2023-08-29 22:54:29,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:54:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:54:29,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:54:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:54:30,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1209 [2023-08-29 22:54:30,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:30,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:30,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1209 [2023-08-29 22:54:30,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:33,954 INFO L130 PetriNetUnfolder]: 28368/39574 cut-off events. [2023-08-29 22:54:33,954 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-29 22:54:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79413 conditions, 39574 events. 28368/39574 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 242815 event pairs, 26445 based on Foata normal form. 0/12105 useless extension candidates. Maximal degree in co-relation 79401. Up to 39441 conditions per place. [2023-08-29 22:54:34,201 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 103 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-29 22:54:34,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 616 flow [2023-08-29 22:54:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:54:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:54:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2052 transitions. [2023-08-29 22:54:34,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42431761786600497 [2023-08-29 22:54:34,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2052 transitions. [2023-08-29 22:54:34,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2052 transitions. [2023-08-29 22:54:34,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:54:34,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2052 transitions. [2023-08-29 22:54:34,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:34,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:34,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:34,219 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 387 flow. Second operand 4 states and 2052 transitions. [2023-08-29 22:54:34,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 616 flow [2023-08-29 22:54:34,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 117 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:54:34,222 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 418 flow [2023-08-29 22:54:34,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2023-08-29 22:54:34,223 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2023-08-29 22:54:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 418 flow [2023-08-29 22:54:34,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 492.25) internal successors, (1969), 4 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:34,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:54:34,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:54:34,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:54:34,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:34,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:54:34,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:54:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1044340948, now seen corresponding path program 2 times [2023-08-29 22:54:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:54:34,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827389637] [2023-08-29 22:54:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:54:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:54:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:54:34,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:54:34,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:54:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:54:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:54:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:54:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:54:34,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-29 22:54:34,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-29 22:54:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:34,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:54:35,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:54:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827389637] [2023-08-29 22:54:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827389637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:54:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:54:35,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 22:54:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245364237] [2023-08-29 22:54:35,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:54:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:54:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:54:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:54:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:54:43,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1209 [2023-08-29 22:54:43,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 418 flow. Second operand has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:54:43,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:54:43,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1209 [2023-08-29 22:54:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:54:46,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:48,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:50,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:51,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:53,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:55,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:57,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:54:58,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:00,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:01,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:03,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:55:10,807 INFO L130 PetriNetUnfolder]: 28388/39615 cut-off events. [2023-08-29 22:55:10,808 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-29 22:55:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79592 conditions, 39615 events. 28388/39615 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243189 event pairs, 26445 based on Foata normal form. 18/12151 useless extension candidates. Maximal degree in co-relation 79578. Up to 39421 conditions per place. [2023-08-29 22:55:11,083 INFO L137 encePairwiseOnDemand]: 1198/1209 looper letters, 87 selfloop transitions, 65 changer transitions 0/158 dead transitions. [2023-08-29 22:55:11,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 984 flow [2023-08-29 22:55:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:55:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:55:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5938 transitions. [2023-08-29 22:55:11,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929142542045766 [2023-08-29 22:55:11,098 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5938 transitions. [2023-08-29 22:55:11,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5938 transitions. [2023-08-29 22:55:11,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:11,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5938 transitions. [2023-08-29 22:55:11,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 494.8333333333333) internal successors, (5938), 12 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:11,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:11,131 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1209.0) internal successors, (15717), 13 states have internal predecessors, (15717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:11,131 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 418 flow. Second operand 12 states and 5938 transitions. [2023-08-29 22:55:11,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 984 flow [2023-08-29 22:55:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 963 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:11,136 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 890 flow [2023-08-29 22:55:11,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=890, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2023-08-29 22:55:11,137 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2023-08-29 22:55:11,137 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 890 flow [2023-08-29 22:55:11,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 482.0) internal successors, (5784), 12 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:11,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:11,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:55:11,150 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 (7)] Ended with exit code 0 [2023-08-29 22:55:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:11,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:11,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -974956327, now seen corresponding path program 1 times [2023-08-29 22:55:11,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706257416] [2023-08-29 22:55:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:11,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:11,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:11,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:55:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:55:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:11,465 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 [2023-08-29 22:55:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:11,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:11,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706257416] [2023-08-29 22:55:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706257416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:11,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 22:55:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932536574] [2023-08-29 22:55:11,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:55:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:55:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:55:14,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 1209 [2023-08-29 22:55:14,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 890 flow. Second operand has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:14,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:14,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 1209 [2023-08-29 22:55:14,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:20,856 INFO L130 PetriNetUnfolder]: 28402/39639 cut-off events. [2023-08-29 22:55:20,856 INFO L131 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2023-08-29 22:55:20,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79801 conditions, 39639 events. 28402/39639 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243611 event pairs, 26445 based on Foata normal form. 0/12159 useless extension candidates. Maximal degree in co-relation 79781. Up to 39423 conditions per place. [2023-08-29 22:55:21,086 INFO L137 encePairwiseOnDemand]: 1196/1209 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2023-08-29 22:55:21,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1326 flow [2023-08-29 22:55:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:55:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:55:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3444 transitions. [2023-08-29 22:55:21,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694789081885857 [2023-08-29 22:55:21,096 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3444 transitions. [2023-08-29 22:55:21,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3444 transitions. [2023-08-29 22:55:21,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:21,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3444 transitions. [2023-08-29 22:55:21,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:21,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:21,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1209.0) internal successors, (9672), 8 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:21,115 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 890 flow. Second operand 7 states and 3444 transitions. [2023-08-29 22:55:21,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1326 flow [2023-08-29 22:55:21,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1175 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-29 22:55:21,121 INFO L231 Difference]: Finished difference. Result has 121 places, 176 transitions, 975 flow [2023-08-29 22:55:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=121, PETRI_TRANSITIONS=176} [2023-08-29 22:55:21,122 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-29 22:55:21,122 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 176 transitions, 975 flow [2023-08-29 22:55:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 477.7142857142857) internal successors, (3344), 7 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:21,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 22:55:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:21,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:21,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash -158725351, now seen corresponding path program 1 times [2023-08-29 22:55:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602928207] [2023-08-29 22:55:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:21,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:21,338 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 (9)] Waiting until timeout for monitored process [2023-08-29 22:55:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:55:21,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:21,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:21,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:21,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602928207] [2023-08-29 22:55:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602928207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:21,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:21,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:55:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037847637] [2023-08-29 22:55:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:21,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:55:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:55:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:55:21,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 1209 [2023-08-29 22:55:21,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 176 transitions, 975 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:21,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:21,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 1209 [2023-08-29 22:55:21,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:25,402 INFO L130 PetriNetUnfolder]: 28401/39638 cut-off events. [2023-08-29 22:55:25,402 INFO L131 PetriNetUnfolder]: For 332/332 co-relation queries the response was YES. [2023-08-29 22:55:25,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79800 conditions, 39638 events. 28401/39638 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 2021. Compared 243725 event pairs, 26445 based on Foata normal form. 1/12173 useless extension candidates. Maximal degree in co-relation 79776. Up to 39510 conditions per place. [2023-08-29 22:55:25,682 INFO L137 encePairwiseOnDemand]: 1206/1209 looper letters, 167 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-08-29 22:55:25,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1309 flow [2023-08-29 22:55:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1584 transitions. [2023-08-29 22:55:25,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43672456575682383 [2023-08-29 22:55:25,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1584 transitions. [2023-08-29 22:55:25,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1584 transitions. [2023-08-29 22:55:25,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:25,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1584 transitions. [2023-08-29 22:55:25,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:25,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:25,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1209.0) internal successors, (4836), 4 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:25,694 INFO L175 Difference]: Start difference. First operand has 121 places, 176 transitions, 975 flow. Second operand 3 states and 1584 transitions. [2023-08-29 22:55:25,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1309 flow [2023-08-29 22:55:25,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1274 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:25,700 INFO L231 Difference]: Finished difference. Result has 121 places, 175 transitions, 940 flow [2023-08-29 22:55:25,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=940, PETRI_PLACES=121, PETRI_TRANSITIONS=175} [2023-08-29 22:55:25,701 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-29 22:55:25,701 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 175 transitions, 940 flow [2023-08-29 22:55:25,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:25,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:25,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:25,715 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 [2023-08-29 22:55:25,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:25,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:25,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -732922040, now seen corresponding path program 1 times [2023-08-29 22:55:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528921067] [2023-08-29 22:55:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:25,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:25,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:25,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:25,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:55:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:55:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:26,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:26,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528921067] [2023-08-29 22:55:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528921067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:26,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:55:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609539306] [2023-08-29 22:55:26,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:55:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:55:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:55:27,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-08-29 22:55:27,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 175 transitions, 940 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:27,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:27,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-08-29 22:55:27,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:36,209 INFO L130 PetriNetUnfolder]: 56787/79249 cut-off events. [2023-08-29 22:55:36,209 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2023-08-29 22:55:36,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159398 conditions, 79249 events. 56787/79249 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 3666. Compared 529288 event pairs, 52890 based on Foata normal form. 4/24321 useless extension candidates. Maximal degree in co-relation 159373. Up to 39490 conditions per place. [2023-08-29 22:55:36,749 INFO L137 encePairwiseOnDemand]: 1200/1209 looper letters, 277 selfloop transitions, 34 changer transitions 0/317 dead transitions. [2023-08-29 22:55:36,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 317 transitions, 2276 flow [2023-08-29 22:55:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:55:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:55:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4430 transitions. [2023-08-29 22:55:36,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071316974542781 [2023-08-29 22:55:36,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4430 transitions. [2023-08-29 22:55:36,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4430 transitions. [2023-08-29 22:55:36,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:36,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4430 transitions. [2023-08-29 22:55:36,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 492.22222222222223) internal successors, (4430), 9 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:36,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:36,778 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:36,778 INFO L175 Difference]: Start difference. First operand has 121 places, 175 transitions, 940 flow. Second operand 9 states and 4430 transitions. [2023-08-29 22:55:36,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 317 transitions, 2276 flow [2023-08-29 22:55:36,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 317 transitions, 2272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:36,787 INFO L231 Difference]: Finished difference. Result has 128 places, 188 transitions, 1133 flow [2023-08-29 22:55:36,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1133, PETRI_PLACES=128, PETRI_TRANSITIONS=188} [2023-08-29 22:55:36,788 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 25 predicate places. [2023-08-29 22:55:36,788 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 188 transitions, 1133 flow [2023-08-29 22:55:36,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:36,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:36,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:36,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:37,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:37,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1249966372, now seen corresponding path program 1 times [2023-08-29 22:55:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:37,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210454641] [2023-08-29 22:55:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:37,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:37,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:37,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:55:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:55:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:55:37,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:37,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210454641] [2023-08-29 22:55:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210454641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:55:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820038425] [2023-08-29 22:55:37,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:55:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1209 [2023-08-29 22:55:37,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 188 transitions, 1133 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:37,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:37,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1209 [2023-08-29 22:55:37,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:45,771 INFO L130 PetriNetUnfolder]: 56785/79247 cut-off events. [2023-08-29 22:55:45,772 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2023-08-29 22:55:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159428 conditions, 79247 events. 56785/79247 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 531651 event pairs, 52890 based on Foata normal form. 2/24317 useless extension candidates. Maximal degree in co-relation 159402. Up to 78980 conditions per place. [2023-08-29 22:55:46,262 INFO L137 encePairwiseOnDemand]: 1204/1209 looper letters, 168 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-08-29 22:55:46,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 1491 flow [2023-08-29 22:55:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:55:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:55:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2076 transitions. [2023-08-29 22:55:46,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292803970223325 [2023-08-29 22:55:46,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2076 transitions. [2023-08-29 22:55:46,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2076 transitions. [2023-08-29 22:55:46,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:46,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2076 transitions. [2023-08-29 22:55:46,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:46,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:46,274 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1209.0) internal successors, (6045), 5 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:46,274 INFO L175 Difference]: Start difference. First operand has 128 places, 188 transitions, 1133 flow. Second operand 4 states and 2076 transitions. [2023-08-29 22:55:46,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 1491 flow [2023-08-29 22:55:46,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1486 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:46,281 INFO L231 Difference]: Finished difference. Result has 129 places, 187 transitions, 1150 flow [2023-08-29 22:55:46,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1150, PETRI_PLACES=129, PETRI_TRANSITIONS=187} [2023-08-29 22:55:46,282 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 26 predicate places. [2023-08-29 22:55:46,283 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 187 transitions, 1150 flow [2023-08-29 22:55:46,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:46,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:46,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:46,299 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 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:46,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:46,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:55:46,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash -5232254, now seen corresponding path program 1 times [2023-08-29 22:55:46,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:55:46,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369502435] [2023-08-29 22:55:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:46,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:55:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:55:46,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:55:46,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:55:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 22:55:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:55:46,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:55:46,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:55:46,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369502435] [2023-08-29 22:55:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369502435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:46,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-08-29 22:55:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995785884] [2023-08-29 22:55:46,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:46,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:55:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:55:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:55:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:55:48,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1209 [2023-08-29 22:55:48,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 187 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:55:48,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:48,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1209 [2023-08-29 22:55:48,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:06,578 INFO L130 PetriNetUnfolder]: 113535/158423 cut-off events. [2023-08-29 22:56:06,578 INFO L131 PetriNetUnfolder]: For 1383/1383 co-relation queries the response was YES. [2023-08-29 22:56:07,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318534 conditions, 158423 events. 113535/158423 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 7137. Compared 1149811 event pairs, 105780 based on Foata normal form. 4/48563 useless extension candidates. Maximal degree in co-relation 318508. Up to 78951 conditions per place. [2023-08-29 22:56:07,687 INFO L137 encePairwiseOnDemand]: 1199/1209 looper letters, 271 selfloop transitions, 44 changer transitions 0/321 dead transitions. [2023-08-29 22:56:07,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 321 transitions, 2557 flow [2023-08-29 22:56:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:56:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:56:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4427 transitions. [2023-08-29 22:56:07,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068559875011488 [2023-08-29 22:56:07,693 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4427 transitions. [2023-08-29 22:56:07,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4427 transitions. [2023-08-29 22:56:07,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:07,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4427 transitions. [2023-08-29 22:56:07,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 491.8888888888889) internal successors, (4427), 9 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:07,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:07,705 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:07,705 INFO L175 Difference]: Start difference. First operand has 129 places, 187 transitions, 1150 flow. Second operand 9 states and 4427 transitions. [2023-08-29 22:56:07,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 321 transitions, 2557 flow [2023-08-29 22:56:07,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 321 transitions, 2556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:07,717 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1381 flow [2023-08-29 22:56:07,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2023-08-29 22:56:07,718 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 33 predicate places. [2023-08-29 22:56:07,718 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1381 flow [2023-08-29 22:56:07,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 474.72727272727275) internal successors, (5222), 11 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:07,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:07,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:07,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:07,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:56:07,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -162261576, now seen corresponding path program 1 times [2023-08-29 22:56:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:56:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345458349] [2023-08-29 22:56:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:07,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:56:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:56:07,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:56:07,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:56:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:56:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:08,084 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 [2023-08-29 22:56:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:56:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:56:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:56:08,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:56:08,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345458349] [2023-08-29 22:56:08,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345458349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:56:08,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:56:08,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2023-08-29 22:56:08,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790892767] [2023-08-29 22:56:08,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:56:08,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:56:08,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:56:08,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:56:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:56:13,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-08-29 22:56:13,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:13,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:13,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-08-29 22:56:13,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:15,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:18,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:56:20,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:13,798 INFO L130 PetriNetUnfolder]: 340331/474687 cut-off events. [2023-08-29 22:57:13,799 INFO L131 PetriNetUnfolder]: For 2679/2679 co-relation queries the response was YES. [2023-08-29 22:57:15,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952611 conditions, 474687 events. 340331/474687 cut-off events. For 2679/2679 co-relation queries the response was YES. Maximal size of possible extension queue 19858. Compared 3833780 event pairs, 317340 based on Foata normal form. 20/145155 useless extension candidates. Maximal degree in co-relation 952584. Up to 157680 conditions per place. [2023-08-29 22:57:17,415 INFO L137 encePairwiseOnDemand]: 1197/1209 looper letters, 265 selfloop transitions, 70 changer transitions 0/341 dead transitions. [2023-08-29 22:57:17,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 341 transitions, 2374 flow [2023-08-29 22:57:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:57:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:57:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4557 transitions. [2023-08-29 22:57:17,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2023-08-29 22:57:17,422 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4557 transitions. [2023-08-29 22:57:17,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4557 transitions. [2023-08-29 22:57:17,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:57:17,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4557 transitions. [2023-08-29 22:57:17,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.3333333333333) internal successors, (4557), 9 states have internal predecessors, (4557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:17,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:17,433 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1209.0) internal successors, (12090), 10 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:17,434 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 1381 flow. Second operand 9 states and 4557 transitions. [2023-08-29 22:57:17,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 341 transitions, 2374 flow [2023-08-29 22:57:17,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 341 transitions, 2354 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-29 22:57:17,445 INFO L231 Difference]: Finished difference. Result has 147 places, 213 transitions, 1716 flow [2023-08-29 22:57:17,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1209, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=147, PETRI_TRANSITIONS=213} [2023-08-29 22:57:17,446 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2023-08-29 22:57:17,446 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 213 transitions, 1716 flow [2023-08-29 22:57:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 481.22222222222223) internal successors, (4331), 9 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:17,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:57:17,447 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:57:17,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:57:17,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:17,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-29 22:57:17,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:57:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash -166560401, now seen corresponding path program 1 times [2023-08-29 22:57:17,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:57:17,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963624220] [2023-08-29 22:57:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:57:17,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:57:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:57:17,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:57:17,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:57:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:57:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:57:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:57:17,793 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 [2023-08-29 22:57:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:57:17,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:57:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 22:57:18,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:57:18,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963624220] [2023-08-29 22:57:18,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963624220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:57:18,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:57:18,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-08-29 22:57:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102206933] [2023-08-29 22:57:18,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:57:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:57:18,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:57:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:57:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:57:30,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 1209 [2023-08-29 22:57:30,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 213 transitions, 1716 flow. Second operand has 13 states, 13 states have (on average 480.6923076923077) internal successors, (6249), 13 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:30,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:30,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 1209 [2023-08-29 22:57:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:57:32,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:35,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:36,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:38,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:39,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:41,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:45,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:46,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:48,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:49,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:50,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:52,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:53,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:55,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:57:56,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []