./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:01:05,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:01:05,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:01:05,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:01:05,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:01:05,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:01:05,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:01:05,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:01:05,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:01:05,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:01:05,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:01:05,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:01:05,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:01:05,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:01:05,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:01:06,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:01:06,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:01:06,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:01:06,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:01:06,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:01:06,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:01:06,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:01:06,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:01:06,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:01:06,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:01:06,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:01:06,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:01:06,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:01:06,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:01:06,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:01:06,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:01:06,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:01:06,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:01:06,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:01:06,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:01:06,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:01:06,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:01:06,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:01:06,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:01:06,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:01:06,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:01:06,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:01:06,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:01:06,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:01:06,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:01:06,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:01:06,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:01:06,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:01:06,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:01:06,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:01:06,080 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:01:06,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:01:06,081 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:01:06,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:01:06,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:01:06,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:01:06,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:01:06,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:01:06,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:01:06,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:01:06,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:01:06,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:01:06,083 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:01:06,084 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:01:06,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:01:06,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:01:06,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:01:06,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:06,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:01:06,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:01:06,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:01:06,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:01:06,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:01:06,086 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:01:06,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:01:06,086 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:01:06,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:01:06,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:01:06,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:01:06,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:01:06,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:01:06,415 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:01:06,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 04:01:07,659 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:01:07,855 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:01:07,856 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 04:01:07,862 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a9bec4c/c61a9bb971d14a569666551269351fad/FLAG6fa854991 [2023-09-01 04:01:07,873 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a9bec4c/c61a9bb971d14a569666551269351fad [2023-09-01 04:01:07,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:01:07,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:01:07,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:07,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:01:07,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:01:07,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:07" (1/1) ... [2023-09-01 04:01:07,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73889b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:07, skipping insertion in model container [2023-09-01 04:01:07,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:07" (1/1) ... [2023-09-01 04:01:07,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:01:07,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:08,098 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2023-09-01 04:01:08,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:08,123 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 04:01:08,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fdca752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:08, skipping insertion in model container [2023-09-01 04:01:08,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:08,126 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 04:01:08,128 INFO L158 Benchmark]: Toolchain (without parser) took 251.70ms. Allocated memory is still 69.2MB. Free memory was 47.0MB in the beginning and 37.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:01:08,128 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:01:08,129 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.95ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:01:08,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 54.5MB. Free memory is still 32.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.95ms. Allocated memory is still 69.2MB. Free memory was 46.8MB in the beginning and 37.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:01:09,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:01:09,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:01:09,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:01:09,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:01:09,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:01:09,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:01:09,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:01:09,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:01:09,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:01:09,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:01:09,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:01:09,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:01:09,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:01:09,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:01:09,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:01:09,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:01:09,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:01:09,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:01:09,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:01:09,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:01:09,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:01:09,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:01:09,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:01:09,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:01:09,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:01:09,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:01:09,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:01:09,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:01:09,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:01:09,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:01:09,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:01:09,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:01:09,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:01:09,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:01:09,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:01:09,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:01:09,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:01:09,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:01:09,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:01:09,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:01:09,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:01:09,924 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:01:09,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:01:09,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:01:09,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:01:09,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:01:09,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:01:09,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:01:09,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:01:09,928 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:01:09,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:01:09,929 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:01:09,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:01:09,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:01:09,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:01:09,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:01:09,930 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:01:09,930 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:01:09,930 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:01:09,931 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:01:09,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:01:09,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:01:09,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:01:09,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:09,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:01:09,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:01:09,933 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:01:09,933 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:01:09,933 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:01:09,934 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:01:09,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:01:09,934 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:01:09,934 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:01:09,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:01:10,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:01:10,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:01:10,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:01:10,306 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:01:10,307 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:01:10,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 04:01:11,469 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:01:11,698 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:01:11,699 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-09-01 04:01:11,706 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c7bca3b/f3b54fb2613e472cbfb84eeb9a82a3dc/FLAG5e18765c2 [2023-09-01 04:01:11,718 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c7bca3b/f3b54fb2613e472cbfb84eeb9a82a3dc [2023-09-01 04:01:11,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:01:11,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:01:11,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:11,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:01:11,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:01:11,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:11" (1/1) ... [2023-09-01 04:01:11,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548e1edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:11, skipping insertion in model container [2023-09-01 04:01:11,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:01:11" (1/1) ... [2023-09-01 04:01:11,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:01:11,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:11,948 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2023-09-01 04:01:11,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:11,981 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 04:01:11,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:01:12,018 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2023-09-01 04:01:12,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:12,034 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:01:12,069 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2023-09-01 04:01:12,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:01:12,092 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:01:12,092 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 04:01:12,098 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:01:12,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12 WrapperNode [2023-09-01 04:01:12,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:01:12,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:01:12,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:01:12,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:01:12,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,159 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 153 [2023-09-01 04:01:12,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:01:12,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:01:12,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:01:12,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:01:12,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:01:12,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:01:12,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:01:12,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:01:12,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (1/1) ... [2023-09-01 04:01:12,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:01:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:01:12,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:01:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:01:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:01:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:01:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:01:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:01:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:01:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:01:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:01:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:01:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 04:01:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 04:01:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 04:01:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 04:01:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 04:01:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:01:12,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:01:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:01:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:01:12,331 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:01:12,421 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:01:12,423 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:01:13,041 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:01:13,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:01:13,141 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 04:01:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:01:13 BoogieIcfgContainer [2023-09-01 04:01:13,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:01:13,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:01:13,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:01:13,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:01:13,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:01:11" (1/3) ... [2023-09-01 04:01:13,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766164ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:01:13, skipping insertion in model container [2023-09-01 04:01:13,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:01:12" (2/3) ... [2023-09-01 04:01:13,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766164ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:01:13, skipping insertion in model container [2023-09-01 04:01:13,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:01:13" (3/3) ... [2023-09-01 04:01:13,152 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-09-01 04:01:13,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:01:13,170 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-09-01 04:01:13,170 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:01:13,280 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 04:01:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 245 transitions, 514 flow [2023-09-01 04:01:13,435 INFO L130 PetriNetUnfolder]: 20/242 cut-off events. [2023-09-01 04:01:13,435 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 04:01:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 20/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-09-01 04:01:13,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 245 transitions, 514 flow [2023-09-01 04:01:13,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 238 transitions, 494 flow [2023-09-01 04:01:13,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:01:13,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 238 transitions, 494 flow [2023-09-01 04:01:13,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 238 transitions, 494 flow [2023-09-01 04:01:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 238 transitions, 494 flow [2023-09-01 04:01:13,519 INFO L130 PetriNetUnfolder]: 20/238 cut-off events. [2023-09-01 04:01:13,520 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 04:01:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 238 events. 20/238 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 192. Up to 3 conditions per place. [2023-09-01 04:01:13,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2023-09-01 04:01:40,540 INFO L134 LiptonReduction]: Checked pairs total: 5374 [2023-09-01 04:01:40,540 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-09-01 04:01:40,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:01:40,557 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;@6f729b53, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:01:40,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 04:01:40,561 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 04:01:40,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:01:40,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:40,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:40,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:01:40,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 29773, now seen corresponding path program 1 times [2023-09-01 04:01:40,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:40,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584046208] [2023-09-01 04:01:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:40,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:40,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:40,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:40,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:01:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:01:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:40,837 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:01:40,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:01:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:40,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:40,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:40,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584046208] [2023-09-01 04:01:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584046208] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:40,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:40,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:40,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873694404] [2023-09-01 04:01:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:41,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-09-01 04:01:41,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:41,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:41,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-09-01 04:01:41,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:42,831 INFO L130 PetriNetUnfolder]: 9642/11941 cut-off events. [2023-09-01 04:01:42,831 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-09-01 04:01:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 11941 events. 9642/11941 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 53529 event pairs, 4611 based on Foata normal form. 0/2839 useless extension candidates. Maximal degree in co-relation 21804. Up to 11861 conditions per place. [2023-09-01 04:01:42,916 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 54 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 04:01:42,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 244 flow [2023-09-01 04:01:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 671 transitions. [2023-09-01 04:01:42,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2023-09-01 04:01:42,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 671 transitions. [2023-09-01 04:01:42,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 671 transitions. [2023-09-01 04:01:42,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:42,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 671 transitions. [2023-09-01 04:01:42,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:42,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:42,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:42,954 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 671 transitions. [2023-09-01 04:01:42,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 244 flow [2023-09-01 04:01:42,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 04:01:42,978 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 124 flow [2023-09-01 04:01:42,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-09-01 04:01:42,983 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-09-01 04:01:42,983 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 124 flow [2023-09-01 04:01:42,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:42,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 04:01:43,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:43,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:43,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:01:43,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash 29774, now seen corresponding path program 1 times [2023-09-01 04:01:43,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:43,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735476581] [2023-09-01 04:01:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:43,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:43,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:43,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:43,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:01:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:01:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:43,416 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:01:43,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:01:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:43,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:43,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735476581] [2023-09-01 04:01:43,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735476581] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:43,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:43,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:01:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204923011] [2023-09-01 04:01:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:01:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:01:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:01:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 495 [2023-09-01 04:01:43,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:43,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:43,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 495 [2023-09-01 04:01:43,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:46,109 INFO L130 PetriNetUnfolder]: 19283/23878 cut-off events. [2023-09-01 04:01:46,109 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 04:01:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 23878 events. 19283/23878 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 2206. Compared 116217 event pairs, 9222 based on Foata normal form. 0/5680 useless extension candidates. Maximal degree in co-relation 47756. Up to 11862 conditions per place. [2023-09-01 04:01:46,220 INFO L137 encePairwiseOnDemand]: 486/495 looper letters, 100 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-09-01 04:01:46,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 109 transitions, 444 flow [2023-09-01 04:01:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:01:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:01:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-09-01 04:01:46,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855218855218855 [2023-09-01 04:01:46,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-09-01 04:01:46,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-09-01 04:01:46,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:46,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-09-01 04:01:46,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:46,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:46,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:46,232 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 124 flow. Second operand 3 states and 721 transitions. [2023-09-01 04:01:46,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 109 transitions, 444 flow [2023-09-01 04:01:46,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:01:46,235 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 173 flow [2023-09-01 04:01:46,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-09-01 04:01:46,236 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-09-01 04:01:46,237 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 173 flow [2023-09-01 04:01:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:46,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:46,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:01:46,248 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 (3)] Ended with exit code 0 [2023-09-01 04:01:46,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:46,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:01:46,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 925829, now seen corresponding path program 1 times [2023-09-01 04:01:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100827027] [2023-09-01 04:01:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:46,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:46,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:01:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:01:46,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:46,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:01:46,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:01:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:46,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:01:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:46,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100827027] [2023-09-01 04:01:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100827027] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:01:46,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:01:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 04:01:46,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792687044] [2023-09-01 04:01:46,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:01:46,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:01:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:01:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:01:48,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 495 [2023-09-01 04:01:48,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:48,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:01:48,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 495 [2023-09-01 04:01:48,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:01:52,096 INFO L130 PetriNetUnfolder]: 28934/35831 cut-off events. [2023-09-01 04:01:52,096 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 04:01:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71711 conditions, 35831 events. 28934/35831 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 2687. Compared 180063 event pairs, 13833 based on Foata normal form. 0/8542 useless extension candidates. Maximal degree in co-relation 71702. Up to 11863 conditions per place. [2023-09-01 04:01:52,298 INFO L137 encePairwiseOnDemand]: 483/495 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2023-09-01 04:01:52,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 176 transitions, 799 flow [2023-09-01 04:01:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:01:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:01:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1316 transitions. [2023-09-01 04:01:52,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430976430976431 [2023-09-01 04:01:52,304 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1316 transitions. [2023-09-01 04:01:52,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1316 transitions. [2023-09-01 04:01:52,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:01:52,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1316 transitions. [2023-09-01 04:01:52,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.33333333333334) internal successors, (1316), 6 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,318 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 173 flow. Second operand 6 states and 1316 transitions. [2023-09-01 04:01:52,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 176 transitions, 799 flow [2023-09-01 04:01:52,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 176 transitions, 775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:01:52,326 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 365 flow [2023-09-01 04:01:52,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2023-09-01 04:01:52,328 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-09-01 04:01:52,328 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 365 flow [2023-09-01 04:01:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:01:52,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:01:52,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:01:52,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:01:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:52,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:01:52,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:01:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash 28717495, now seen corresponding path program 1 times [2023-09-01 04:01:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:01:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757572409] [2023-09-01 04:01:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:01:52,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:01:52,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:01:52,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:01:52,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:01:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:01:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 04:01:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:01:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:52,757 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-09-01 04:01:52,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-09-01 04:01:53,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:01:53,058 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 04:01:53,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 04:01:53,338 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-09-01 04:01:53,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-09-01 04:01:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:01:55,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:01:55,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:01:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757572409] [2023-09-01 04:01:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757572409] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:01:55,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:01:55,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:01:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533741946] [2023-09-01 04:01:55,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:01:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:01:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:01:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:01:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2023-09-01 04:01:58,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:00,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:02,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:05,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:07,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:09,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:11,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:02:11,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-09-01 04:02:11,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:11,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:11,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-09-01 04:02:11,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:13,519 INFO L130 PetriNetUnfolder]: 22362/27960 cut-off events. [2023-09-01 04:02:13,520 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 04:02:13,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56031 conditions, 27960 events. 22362/27960 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 142301 event pairs, 10683 based on Foata normal form. 0/7115 useless extension candidates. Maximal degree in co-relation 56018. Up to 27720 conditions per place. [2023-09-01 04:02:13,650 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-09-01 04:02:13,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 499 flow [2023-09-01 04:02:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:02:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:02:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-09-01 04:02:13,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38855218855218854 [2023-09-01 04:02:13,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-09-01 04:02:13,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-09-01 04:02:13,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:13,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-09-01 04:02:13,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,661 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 365 flow. Second operand 3 states and 577 transitions. [2023-09-01 04:02:13,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 499 flow [2023-09-01 04:02:13,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 469 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 04:02:13,664 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 317 flow [2023-09-01 04:02:13,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2023-09-01 04:02:13,665 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-09-01 04:02:13,665 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 317 flow [2023-09-01 04:02:13,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:13,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:13,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 04:02:13,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 04:02:13,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:13,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:02:13,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 28717496, now seen corresponding path program 1 times [2023-09-01 04:02:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:13,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540708832] [2023-09-01 04:02:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:13,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:02:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:02:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:14,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,093 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 04:02:14,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 04:02:14,116 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 04:02:14,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 04:02:14,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:02:14,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:14,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:02:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:14,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:14,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:14,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540708832] [2023-09-01 04:02:14,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540708832] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:14,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:02:14,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235690125] [2023-09-01 04:02:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:14,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:02:14,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:14,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:02:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:02:14,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-09-01 04:02:14,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:14,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:14,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-09-01 04:02:14,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:16,122 INFO L130 PetriNetUnfolder]: 15790/20089 cut-off events. [2023-09-01 04:02:16,123 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-09-01 04:02:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 20089 events. 15790/20089 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 103825 event pairs, 7533 based on Foata normal form. 0/5693 useless extension candidates. Maximal degree in co-relation 40249. Up to 19849 conditions per place. [2023-09-01 04:02:16,198 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-09-01 04:02:16,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 443 flow [2023-09-01 04:02:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:02:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:02:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-09-01 04:02:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46195286195286195 [2023-09-01 04:02:16,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-09-01 04:02:16,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-09-01 04:02:16,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:16,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-09-01 04:02:16,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:16,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:16,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:16,208 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 317 flow. Second operand 3 states and 686 transitions. [2023-09-01 04:02:16,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 443 flow [2023-09-01 04:02:16,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:02:16,210 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 298 flow [2023-09-01 04:02:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2023-09-01 04:02:16,211 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-09-01 04:02:16,211 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 298 flow [2023-09-01 04:02:16,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:16,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:16,212 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 04:02:16,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:16,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:16,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:02:16,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1814383118, now seen corresponding path program 2 times [2023-09-01 04:02:16,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:16,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815288536] [2023-09-01 04:02:16,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:02:16,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:16,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:16,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:16,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:02:16,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:02:16,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:02:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 04:02:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:16,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:02:16,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:02:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:16,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:02:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:17,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815288536] [2023-09-01 04:02:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815288536] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:02:17,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:02:17,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:02:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211174103] [2023-09-01 04:02:17,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:02:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:02:17,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:02:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:02:21,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-09-01 04:02:21,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 298 flow. Second operand has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:21,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:21,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-09-01 04:02:21,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:23,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:24,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:26,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:28,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:30,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:32,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:33,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:34,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:37,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:40,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:43,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:02:51,984 INFO L130 PetriNetUnfolder]: 52614/66920 cut-off events. [2023-09-01 04:02:51,984 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:02:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134005 conditions, 66920 events. 52614/66920 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 3076. Compared 378801 event pairs, 25110 based on Foata normal form. 18/18971 useless extension candidates. Maximal degree in co-relation 133990. Up to 6629 conditions per place. [2023-09-01 04:02:52,318 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 428 selfloop transitions, 52 changer transitions 0/483 dead transitions. [2023-09-01 04:02:52,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 483 transitions, 2278 flow [2023-09-01 04:02:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 04:02:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 04:02:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2802 transitions. [2023-09-01 04:02:52,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717171717171717 [2023-09-01 04:02:52,326 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2802 transitions. [2023-09-01 04:02:52,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2802 transitions. [2023-09-01 04:02:52,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:52,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2802 transitions. [2023-09-01 04:02:52,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.5) internal successors, (2802), 12 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:52,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:52,342 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:52,342 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 298 flow. Second operand 12 states and 2802 transitions. [2023-09-01 04:02:52,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 483 transitions, 2278 flow [2023-09-01 04:02:52,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 483 transitions, 2277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:02:52,350 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 687 flow [2023-09-01 04:02:52,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2023-09-01 04:02:52,353 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-09-01 04:02:52,354 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 687 flow [2023-09-01 04:02:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.0) internal successors, (2316), 12 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:52,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:52,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:02:52,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:52,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:02:52,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731773, now seen corresponding path program 1 times [2023-09-01 04:02:52,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:52,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366059412] [2023-09-01 04:02:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:52,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:52,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:02:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:02:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:52,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:52,728 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 04:02:52,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 04:02:52,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 04:02:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:52,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:02:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:52,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:02:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:02:52,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:02:52,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:02:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366059412] [2023-09-01 04:02:52,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366059412] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:02:52,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:02:52,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:02:52,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214224382] [2023-09-01 04:02:52,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:02:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:02:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:02:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:02:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:02:53,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 495 [2023-09-01 04:02:53,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:53,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:02:53,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 495 [2023-09-01 04:02:53,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:02:57,955 INFO L130 PetriNetUnfolder]: 50544/64230 cut-off events. [2023-09-01 04:02:57,955 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-09-01 04:02:58,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128744 conditions, 64230 events. 50544/64230 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 2695. Compared 361545 event pairs, 24120 based on Foata normal form. 0/18528 useless extension candidates. Maximal degree in co-relation 128721. Up to 63430 conditions per place. [2023-09-01 04:02:58,320 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 101 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-09-01 04:02:58,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 887 flow [2023-09-01 04:02:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:02:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:02:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-09-01 04:02:58,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2023-09-01 04:02:58,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-09-01 04:02:58,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-09-01 04:02:58,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:02:58,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-09-01 04:02:58,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:58,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:58,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:58,326 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 687 flow. Second operand 3 states and 684 transitions. [2023-09-01 04:02:58,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 887 flow [2023-09-01 04:02:58,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 794 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 04:02:58,333 INFO L231 Difference]: Finished difference. Result has 78 places, 105 transitions, 592 flow [2023-09-01 04:02:58,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=78, PETRI_TRANSITIONS=105} [2023-09-01 04:02:58,335 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-09-01 04:02:58,335 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 105 transitions, 592 flow [2023-09-01 04:02:58,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:02:58,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:02:58,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 04:02:58,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:02:58,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:58,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:02:58,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:02:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1827731774, now seen corresponding path program 1 times [2023-09-01 04:02:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:02:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410648163] [2023-09-01 04:02:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:02:58,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:02:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:02:58,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:02:58,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:02:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:02:58,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:02:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:02:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:58,690 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-09-01 04:02:58,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-09-01 04:02:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:02:58,901 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-09-01 04:02:58,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-09-01 04:03:01,049 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-09-01 04:03:01,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2023-09-01 04:03:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:03,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:03,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410648163] [2023-09-01 04:03:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410648163] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:03,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:03:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117118639] [2023-09-01 04:03:03,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:03,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:03:03,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:03:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2023-09-01 04:03:06,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:08,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:10,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:12,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:15,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:17,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:19,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:21,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:23,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:25,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:27,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:03:28,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 495 [2023-09-01 04:03:28,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 105 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:28,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:28,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 495 [2023-09-01 04:03:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:34,897 INFO L130 PetriNetUnfolder]: 48474/61540 cut-off events. [2023-09-01 04:03:34,897 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:03:35,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123307 conditions, 61540 events. 48474/61540 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 343401 event pairs, 23130 based on Foata normal form. 0/18120 useless extension candidates. Maximal degree in co-relation 123283. Up to 60740 conditions per place. [2023-09-01 04:03:35,295 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 99 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-09-01 04:03:35,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 788 flow [2023-09-01 04:03:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:03:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:03:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-09-01 04:03:35,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845117845117845 [2023-09-01 04:03:35,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-09-01 04:03:35,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-09-01 04:03:35,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:35,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-09-01 04:03:35,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:35,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:35,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:35,302 INFO L175 Difference]: Start difference. First operand has 78 places, 105 transitions, 592 flow. Second operand 3 states and 571 transitions. [2023-09-01 04:03:35,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 788 flow [2023-09-01 04:03:35,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:03:35,307 INFO L231 Difference]: Finished difference. Result has 77 places, 103 transitions, 589 flow [2023-09-01 04:03:35,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=589, PETRI_PLACES=77, PETRI_TRANSITIONS=103} [2023-09-01 04:03:35,307 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-09-01 04:03:35,307 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 103 transitions, 589 flow [2023-09-01 04:03:35,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:35,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:35,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:35,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:03:35,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:35,518 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:03:35,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash 825103132, now seen corresponding path program 1 times [2023-09-01 04:03:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:35,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338163379] [2023-09-01 04:03:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:35,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:35,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:03:35,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 04:03:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:03:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:35,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:35,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338163379] [2023-09-01 04:03:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338163379] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:03:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085910524] [2023-09-01 04:03:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:03:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:03:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:03:35,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-09-01 04:03:35,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 103 transitions, 589 flow. Second operand has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:35,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:35,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-09-01 04:03:35,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:40,530 INFO L130 PetriNetUnfolder]: 39814/52152 cut-off events. [2023-09-01 04:03:40,530 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-09-01 04:03:40,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104609 conditions, 52152 events. 39814/52152 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 2537. Compared 310309 event pairs, 21610 based on Foata normal form. 2/17345 useless extension candidates. Maximal degree in co-relation 104584. Up to 49043 conditions per place. [2023-09-01 04:03:41,063 INFO L137 encePairwiseOnDemand]: 482/495 looper letters, 129 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2023-09-01 04:03:41,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 159 transitions, 1033 flow [2023-09-01 04:03:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:03:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:03:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-09-01 04:03:41,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45494949494949494 [2023-09-01 04:03:41,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-09-01 04:03:41,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-09-01 04:03:41,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:41,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-09-01 04:03:41,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:41,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:41,073 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:41,073 INFO L175 Difference]: Start difference. First operand has 77 places, 103 transitions, 589 flow. Second operand 5 states and 1126 transitions. [2023-09-01 04:03:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 159 transitions, 1033 flow [2023-09-01 04:03:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 159 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:03:41,078 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 704 flow [2023-09-01 04:03:41,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=704, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2023-09-01 04:03:41,080 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2023-09-01 04:03:41,080 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 704 flow [2023-09-01 04:03:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:41,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:41,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:41,090 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 (10)] Ended with exit code 0 [2023-09-01 04:03:41,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:41,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:03:41,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash -191367404, now seen corresponding path program 1 times [2023-09-01 04:03:41,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:41,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926776289] [2023-09-01 04:03:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:41,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:41,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:03:41,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:03:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:03:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:41,458 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 04:03:41,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-09-01 04:03:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:03:41,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:03:41,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:03:41,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:03:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:41,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:41,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:41,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926776289] [2023-09-01 04:03:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926776289] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:03:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828960196] [2023-09-01 04:03:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:03:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:03:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:03:41,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 495 [2023-09-01 04:03:41,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 704 flow. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:41,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:41,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 495 [2023-09-01 04:03:41,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:46,489 INFO L130 PetriNetUnfolder]: 43602/55069 cut-off events. [2023-09-01 04:03:46,490 INFO L131 PetriNetUnfolder]: For 1584/1709 co-relation queries the response was YES. [2023-09-01 04:03:46,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122335 conditions, 55069 events. 43602/55069 cut-off events. For 1584/1709 co-relation queries the response was YES. Maximal size of possible extension queue 2256. Compared 304402 event pairs, 20448 based on Foata normal form. 125/19195 useless extension candidates. Maximal degree in co-relation 122306. Up to 54409 conditions per place. [2023-09-01 04:03:46,879 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 99 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 04:03:46,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 900 flow [2023-09-01 04:03:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:03:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:03:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-09-01 04:03:46,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498316498316498 [2023-09-01 04:03:46,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-09-01 04:03:46,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-09-01 04:03:46,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:46,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-09-01 04:03:46,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,886 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 704 flow. Second operand 3 states and 668 transitions. [2023-09-01 04:03:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 900 flow [2023-09-01 04:03:46,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 868 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 04:03:46,906 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 670 flow [2023-09-01 04:03:46,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=670, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-09-01 04:03:46,907 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-09-01 04:03:46,907 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 670 flow [2023-09-01 04:03:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:46,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:46,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:46,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-09-01 04:03:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:47,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:03:47,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash -191367406, now seen corresponding path program 1 times [2023-09-01 04:03:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:47,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917992264] [2023-09-01 04:03:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:47,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:47,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:03:47,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:03:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:03:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:03:47,309 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 04:03:47,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 04:03:47,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 442 [2023-09-01 04:03:47,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:03:47,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:03:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:03:47,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 04:03:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:47,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:47,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917992264] [2023-09-01 04:03:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917992264] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:47,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:47,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:03:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114013592] [2023-09-01 04:03:47,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:47,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:03:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:03:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:03:47,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 495 [2023-09-01 04:03:47,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 670 flow. Second operand has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:47,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:47,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 495 [2023-09-01 04:03:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:52,399 INFO L130 PetriNetUnfolder]: 41311/52052 cut-off events. [2023-09-01 04:03:52,399 INFO L131 PetriNetUnfolder]: For 1383/1499 co-relation queries the response was YES. [2023-09-01 04:03:52,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115485 conditions, 52052 events. 41311/52052 cut-off events. For 1383/1499 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 283846 event pairs, 19295 based on Foata normal form. 116/18594 useless extension candidates. Maximal degree in co-relation 115455. Up to 51392 conditions per place. [2023-09-01 04:03:52,958 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 97 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 04:03:52,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 862 flow [2023-09-01 04:03:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:03:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:03:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-09-01 04:03:52,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252525252525255 [2023-09-01 04:03:52,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-09-01 04:03:52,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-09-01 04:03:52,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:52,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-09-01 04:03:52,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:52,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:52,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:52,964 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 670 flow. Second operand 3 states and 672 transitions. [2023-09-01 04:03:52,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 862 flow [2023-09-01 04:03:52,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 861 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:03:52,977 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 667 flow [2023-09-01 04:03:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-09-01 04:03:52,978 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-09-01 04:03:52,978 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 667 flow [2023-09-01 04:03:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:52,989 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 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:03:53,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:53,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:03:53,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429100, now seen corresponding path program 1 times [2023-09-01 04:03:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630645867] [2023-09-01 04:03:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:53,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:53,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:53,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:03:53,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:03:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:53,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:03:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:53,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 04:03:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:53,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:53,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630645867] [2023-09-01 04:03:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630645867] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:03:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7306875] [2023-09-01 04:03:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:03:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:03:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:03:53,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-09-01 04:03:53,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 667 flow. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:53,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:53,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-09-01 04:03:53,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:03:56,916 INFO L130 PetriNetUnfolder]: 30671/38892 cut-off events. [2023-09-01 04:03:56,916 INFO L131 PetriNetUnfolder]: For 1103/1190 co-relation queries the response was YES. [2023-09-01 04:03:57,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86502 conditions, 38892 events. 30671/38892 cut-off events. For 1103/1190 co-relation queries the response was YES. Maximal size of possible extension queue 1589. Compared 208614 event pairs, 14069 based on Foata normal form. 87/14954 useless extension candidates. Maximal degree in co-relation 86471. Up to 38237 conditions per place. [2023-09-01 04:03:57,165 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 90 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-09-01 04:03:57,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 855 flow [2023-09-01 04:03:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:03:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:03:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 847 transitions. [2023-09-01 04:03:57,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-09-01 04:03:57,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 847 transitions. [2023-09-01 04:03:57,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 847 transitions. [2023-09-01 04:03:57,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:03:57,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 847 transitions. [2023-09-01 04:03:57,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.75) internal successors, (847), 4 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:57,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:57,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:57,172 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 667 flow. Second operand 4 states and 847 transitions. [2023-09-01 04:03:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 855 flow [2023-09-01 04:03:57,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 854 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:03:57,182 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 674 flow [2023-09-01 04:03:57,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-09-01 04:03:57,183 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-09-01 04:03:57,183 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 674 flow [2023-09-01 04:03:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:57,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:03:57,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:03:57,197 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 (13)] Ended with exit code 0 [2023-09-01 04:03:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:57,394 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:03:57,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:03:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1637429101, now seen corresponding path program 1 times [2023-09-01 04:03:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:03:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284417587] [2023-09-01 04:03:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:03:57,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:03:57,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:03:57,396 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:03:57,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:03:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:03:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:03:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:03:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:03:57,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:03:57,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:03:57,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284417587] [2023-09-01 04:03:57,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284417587] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:03:57,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:03:57,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:03:57,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963466209] [2023-09-01 04:03:57,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:03:57,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:03:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:03:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:03:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:03:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 495 [2023-09-01 04:03:57,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 674 flow. Second operand has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:03:57,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:03:57,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 495 [2023-09-01 04:03:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:04:00,694 INFO L130 PetriNetUnfolder]: 24453/32504 cut-off events. [2023-09-01 04:04:00,694 INFO L131 PetriNetUnfolder]: For 1811/1846 co-relation queries the response was YES. [2023-09-01 04:04:00,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73421 conditions, 32504 events. 24453/32504 cut-off events. For 1811/1846 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 187003 event pairs, 13672 based on Foata normal form. 35/14514 useless extension candidates. Maximal degree in co-relation 73389. Up to 31529 conditions per place. [2023-09-01 04:04:00,925 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 101 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2023-09-01 04:04:00,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 1012 flow [2023-09-01 04:04:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:04:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:04:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1097 transitions. [2023-09-01 04:04:00,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44323232323232326 [2023-09-01 04:04:00,928 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1097 transitions. [2023-09-01 04:04:00,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1097 transitions. [2023-09-01 04:04:00,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:04:00,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1097 transitions. [2023-09-01 04:04:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.4) internal successors, (1097), 5 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:00,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:00,933 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:00,933 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 674 flow. Second operand 5 states and 1097 transitions. [2023-09-01 04:04:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 1012 flow [2023-09-01 04:04:00,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 132 transitions, 1004 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:04:00,941 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 744 flow [2023-09-01 04:04:00,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=744, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2023-09-01 04:04:00,942 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-09-01 04:04:00,942 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 744 flow [2023-09-01 04:04:00,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:00,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:04:00,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:04:00,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:04:01,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:04:01,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:04:01,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:04:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -414734544, now seen corresponding path program 1 times [2023-09-01 04:04:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:04:01,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920394925] [2023-09-01 04:04:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:04:01,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:04:01,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:04:01,155 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:04:01,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:04:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:04:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 04:04:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:04:01,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:04:01,410 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 04:04:01,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 04:04:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:04:01,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:04:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:04:01,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:04:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920394925] [2023-09-01 04:04:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920394925] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:04:01,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:04:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:04:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961740170] [2023-09-01 04:04:01,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:04:01,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:04:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:04:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:04:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:04:05,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 495 [2023-09-01 04:04:05,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 744 flow. Second operand has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:05,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:04:05,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 495 [2023-09-01 04:04:05,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:04:23,507 INFO L130 PetriNetUnfolder]: 114727/148522 cut-off events. [2023-09-01 04:04:23,507 INFO L131 PetriNetUnfolder]: For 13325/13365 co-relation queries the response was YES. [2023-09-01 04:04:24,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365648 conditions, 148522 events. 114727/148522 cut-off events. For 13325/13365 co-relation queries the response was YES. Maximal size of possible extension queue 5891. Compared 982809 event pairs, 46342 based on Foata normal form. 149/66682 useless extension candidates. Maximal degree in co-relation 365614. Up to 46273 conditions per place. [2023-09-01 04:04:24,702 INFO L137 encePairwiseOnDemand]: 481/495 looper letters, 512 selfloop transitions, 68 changer transitions 0/583 dead transitions. [2023-09-01 04:04:24,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 583 transitions, 3720 flow [2023-09-01 04:04:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 04:04:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 04:04:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4757 transitions. [2023-09-01 04:04:24,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178304787000439 [2023-09-01 04:04:24,710 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4757 transitions. [2023-09-01 04:04:24,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4757 transitions. [2023-09-01 04:04:24,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:04:24,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4757 transitions. [2023-09-01 04:04:24,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 206.82608695652175) internal successors, (4757), 23 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:24,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:24,727 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 495.0) internal successors, (11880), 24 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:24,727 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 744 flow. Second operand 23 states and 4757 transitions. [2023-09-01 04:04:24,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 583 transitions, 3720 flow [2023-09-01 04:04:25,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 583 transitions, 3633 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:04:25,330 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1272 flow [2023-09-01 04:04:25,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1272, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2023-09-01 04:04:25,331 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 56 predicate places. [2023-09-01 04:04:25,331 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1272 flow [2023-09-01 04:04:25,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.66666666666666) internal successors, (2228), 12 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:25,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:04:25,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:04:25,342 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 (15)] Ended with exit code 0 [2023-09-01 04:04:25,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:04:25,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:04:25,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:04:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash -414734678, now seen corresponding path program 1 times [2023-09-01 04:04:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:04:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507578443] [2023-09-01 04:04:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:04:25,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:04:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:04:25,543 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:04:25,544 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 (16)] Waiting until timeout for monitored process [2023-09-01 04:04:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:04:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:04:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:04:25,781 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:04:25,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:04:25,863 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:04:25,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:04:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:04:26,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:04:26,102 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:04:26,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:04:26,150 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 04:04:26,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 04:04:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:04:26,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:04:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:04:30,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:04:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507578443] [2023-09-01 04:04:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507578443] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:04:30,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:04:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:04:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13076963] [2023-09-01 04:04:30,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:04:30,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:04:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:04:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:04:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:04:36,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 495 [2023-09-01 04:04:36,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1272 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:04:36,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:04:36,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 495 [2023-09-01 04:04:36,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:04:49,167 WARN L222 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:05:03,078 WARN L222 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:05:27,203 INFO L130 PetriNetUnfolder]: 113306/146023 cut-off events. [2023-09-01 04:05:27,203 INFO L131 PetriNetUnfolder]: For 104198/104238 co-relation queries the response was YES. [2023-09-01 04:05:28,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396091 conditions, 146023 events. 113306/146023 cut-off events. For 104198/104238 co-relation queries the response was YES. Maximal size of possible extension queue 5795. Compared 961302 event pairs, 29829 based on Foata normal form. 40/68354 useless extension candidates. Maximal degree in co-relation 396041. Up to 45343 conditions per place. [2023-09-01 04:05:28,841 INFO L137 encePairwiseOnDemand]: 479/495 looper letters, 426 selfloop transitions, 113 changer transitions 0/542 dead transitions. [2023-09-01 04:05:28,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 542 transitions, 3796 flow [2023-09-01 04:05:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:05:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:05:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4677 transitions. [2023-09-01 04:05:28,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936868686868687 [2023-09-01 04:05:28,851 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4677 transitions. [2023-09-01 04:05:28,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4677 transitions. [2023-09-01 04:05:28,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:05:28,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4677 transitions. [2023-09-01 04:05:28,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 194.875) internal successors, (4677), 24 states have internal predecessors, (4677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:29,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:29,049 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:29,049 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1272 flow. Second operand 24 states and 4677 transitions. [2023-09-01 04:05:29,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 542 transitions, 3796 flow [2023-09-01 04:05:30,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 542 transitions, 3742 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-09-01 04:05:30,633 INFO L231 Difference]: Finished difference. Result has 147 places, 179 transitions, 1788 flow [2023-09-01 04:05:30,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1788, PETRI_PLACES=147, PETRI_TRANSITIONS=179} [2023-09-01 04:05:30,634 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 82 predicate places. [2023-09-01 04:05:30,634 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 179 transitions, 1788 flow [2023-09-01 04:05:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:30,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:05:30,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:05:30,644 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 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:05:30,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:30,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:05:30,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:05:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -414734676, now seen corresponding path program 1 times [2023-09-01 04:05:30,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:05:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273748260] [2023-09-01 04:05:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:05:30,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:05:30,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:05:30,843 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 (17)] Waiting until timeout for monitored process [2023-09-01 04:05:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:05:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:05:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:05:31,035 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:05:31,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:05:31,060 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-09-01 04:05:31,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-09-01 04:05:31,077 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:05:31,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:05:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:05:31,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:05:31,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:05:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273748260] [2023-09-01 04:05:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273748260] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:05:31,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:05:31,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:05:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575276994] [2023-09-01 04:05:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:05:31,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:05:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:05:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:05:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:05:31,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 495 [2023-09-01 04:05:31,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 179 transitions, 1788 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:31,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:05:31,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 495 [2023-09-01 04:05:31,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:05:44,921 INFO L130 PetriNetUnfolder]: 88142/112445 cut-off events. [2023-09-01 04:05:44,921 INFO L131 PetriNetUnfolder]: For 149797/152489 co-relation queries the response was YES. [2023-09-01 04:05:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344091 conditions, 112445 events. 88142/112445 cut-off events. For 149797/152489 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 695141 event pairs, 42658 based on Foata normal form. 7593/68105 useless extension candidates. Maximal degree in co-relation 344035. Up to 111296 conditions per place. [2023-09-01 04:05:46,600 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 155 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2023-09-01 04:05:46,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 177 transitions, 2114 flow [2023-09-01 04:05:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:05:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:05:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-09-01 04:05:46,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2023-09-01 04:05:46,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-09-01 04:05:46,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-09-01 04:05:46,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:05:46,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-09-01 04:05:46,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:46,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:46,605 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:46,605 INFO L175 Difference]: Start difference. First operand has 147 places, 179 transitions, 1788 flow. Second operand 4 states and 837 transitions. [2023-09-01 04:05:46,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 177 transitions, 2114 flow [2023-09-01 04:05:52,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 177 transitions, 1910 flow, removed 70 selfloop flow, removed 4 redundant places. [2023-09-01 04:05:52,678 INFO L231 Difference]: Finished difference. Result has 144 places, 177 transitions, 1600 flow [2023-09-01 04:05:52,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1600, PETRI_PLACES=144, PETRI_TRANSITIONS=177} [2023-09-01 04:05:52,679 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 79 predicate places. [2023-09-01 04:05:52,679 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 177 transitions, 1600 flow [2023-09-01 04:05:52,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:52,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:05:52,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:05:52,687 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 (17)] Ended with exit code 0 [2023-09-01 04:05:52,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:52,880 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:05:52,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:05:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -414734545, now seen corresponding path program 1 times [2023-09-01 04:05:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:05:52,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925418307] [2023-09-01 04:05:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:05:52,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:05:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:05:52,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:05:52,883 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 (18)] Waiting until timeout for monitored process [2023-09-01 04:05:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:05:53,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:05:53,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:05:53,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 04:05:53,051 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:05:53,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 04:05:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 04:05:53,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:05:53,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:05:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925418307] [2023-09-01 04:05:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925418307] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:05:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:05:53,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:05:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253668475] [2023-09-01 04:05:53,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:05:53,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:05:53,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:05:53,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:05:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:05:53,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 495 [2023-09-01 04:05:53,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 177 transitions, 1600 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:05:53,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:05:53,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 495 [2023-09-01 04:05:53,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:06:02,365 INFO L130 PetriNetUnfolder]: 63492/81457 cut-off events. [2023-09-01 04:06:02,366 INFO L131 PetriNetUnfolder]: For 76516/78812 co-relation queries the response was YES. [2023-09-01 04:06:03,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233342 conditions, 81457 events. 63492/81457 cut-off events. For 76516/78812 co-relation queries the response was YES. Maximal size of possible extension queue 3084. Compared 492617 event pairs, 30513 based on Foata normal form. 2296/51292 useless extension candidates. Maximal degree in co-relation 233287. Up to 80609 conditions per place. [2023-09-01 04:06:03,428 INFO L137 encePairwiseOnDemand]: 491/495 looper letters, 131 selfloop transitions, 24 changer transitions 0/165 dead transitions. [2023-09-01 04:06:03,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 1845 flow [2023-09-01 04:06:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:06:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:06:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-09-01 04:06:03,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42373737373737375 [2023-09-01 04:06:03,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-09-01 04:06:03,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-09-01 04:06:03,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:06:03,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-09-01 04:06:03,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:03,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:03,433 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 495.0) internal successors, (2475), 5 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:03,433 INFO L175 Difference]: Start difference. First operand has 144 places, 177 transitions, 1600 flow. Second operand 4 states and 839 transitions. [2023-09-01 04:06:03,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 1845 flow [2023-09-01 04:06:05,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 165 transitions, 1832 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:06:05,268 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1570 flow [2023-09-01 04:06:05,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1570, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2023-09-01 04:06:05,269 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 78 predicate places. [2023-09-01 04:06:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1570 flow [2023-09-01 04:06:05,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:05,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:06:05,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:06:05,279 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 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:06:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:06:05,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:06:05,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:06:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1604115565, now seen corresponding path program 1 times [2023-09-01 04:06:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:06:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608115785] [2023-09-01 04:06:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:06:05,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:06:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:06:05,478 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:06:05,479 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 (19)] Waiting until timeout for monitored process [2023-09-01 04:06:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:06:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 04:06:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:06:05,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:06:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:06:05,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:06:05,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:06:05,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608115785] [2023-09-01 04:06:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608115785] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:06:05,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:06:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 04:06:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206878186] [2023-09-01 04:06:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:06:05,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:06:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:06:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:06:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:06:06,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 495 [2023-09-01 04:06:06,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1570 flow. Second operand has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:06,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:06:06,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 495 [2023-09-01 04:06:06,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:06:20,410 INFO L130 PetriNetUnfolder]: 90456/117461 cut-off events. [2023-09-01 04:06:20,410 INFO L131 PetriNetUnfolder]: For 139762/143486 co-relation queries the response was YES. [2023-09-01 04:06:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343543 conditions, 117461 events. 90456/117461 cut-off events. For 139762/143486 co-relation queries the response was YES. Maximal size of possible extension queue 4436. Compared 764891 event pairs, 32426 based on Foata normal form. 3724/80736 useless extension candidates. Maximal degree in co-relation 343488. Up to 76058 conditions per place. [2023-09-01 04:06:21,905 INFO L137 encePairwiseOnDemand]: 490/495 looper letters, 190 selfloop transitions, 14 changer transitions 0/213 dead transitions. [2023-09-01 04:06:21,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 213 transitions, 2246 flow [2023-09-01 04:06:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:06:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:06:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-09-01 04:06:21,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2023-09-01 04:06:21,907 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-09-01 04:06:21,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-09-01 04:06:21,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:06:21,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-09-01 04:06:21,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:21,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:21,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 495.0) internal successors, (2970), 6 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:21,912 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1570 flow. Second operand 5 states and 1065 transitions. [2023-09-01 04:06:21,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 213 transitions, 2246 flow [2023-09-01 04:06:25,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 213 transitions, 2221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:06:25,325 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1581 flow [2023-09-01 04:06:25,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1581, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2023-09-01 04:06:25,326 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 81 predicate places. [2023-09-01 04:06:25,326 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1581 flow [2023-09-01 04:06:25,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:25,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:06:25,326 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 04:06:25,333 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 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:06:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:06:25,527 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:06:25,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:06:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -182851922, now seen corresponding path program 3 times [2023-09-01 04:06:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:06:25,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580479422] [2023-09-01 04:06:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:06:25,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:06:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:06:25,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:06:25,532 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 (20)] Waiting until timeout for monitored process [2023-09-01 04:06:25,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 04:06:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:06:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:06:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:06:25,791 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:06:25,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:06:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:06:26,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:06:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:06:28,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:06:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580479422] [2023-09-01 04:06:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580479422] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:06:28,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:06:28,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 04:06:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070070563] [2023-09-01 04:06:28,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:06:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 04:06:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:06:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 04:06:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 04:06:46,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 495 [2023-09-01 04:06:46,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1581 flow. Second operand has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:06:46,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:06:46,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 495 [2023-09-01 04:06:46,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:06:56,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:06:58,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:00,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:02,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:04,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:06,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:08,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:09,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:11,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:13,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:18,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:19,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:22,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:24,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:27,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:31,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:33,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:34,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:36,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:38,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:40,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:42,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:44,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:46,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:49,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:51,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:53,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:54,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:57,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:07:58,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:08:02,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:08:05,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:08:38,828 INFO L130 PetriNetUnfolder]: 171759/222858 cut-off events. [2023-09-01 04:08:38,828 INFO L131 PetriNetUnfolder]: For 310144/320112 co-relation queries the response was YES. [2023-09-01 04:08:40,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667400 conditions, 222858 events. 171759/222858 cut-off events. For 310144/320112 co-relation queries the response was YES. Maximal size of possible extension queue 4923. Compared 1478787 event pairs, 91338 based on Foata normal form. 10004/157110 useless extension candidates. Maximal degree in co-relation 667344. Up to 61001 conditions per place. [2023-09-01 04:08:41,782 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 692 selfloop transitions, 159 changer transitions 0/861 dead transitions. [2023-09-01 04:08:41,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 861 transitions, 7333 flow [2023-09-01 04:08:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 04:08:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 04:08:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7772 transitions. [2023-09-01 04:08:41,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243516243516244 [2023-09-01 04:08:41,790 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7772 transitions. [2023-09-01 04:08:41,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7772 transitions. [2023-09-01 04:08:41,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:08:41,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7772 transitions. [2023-09-01 04:08:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 210.05405405405406) internal successors, (7772), 37 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:41,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 495.0) internal successors, (18810), 38 states have internal predecessors, (18810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:41,808 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 495.0) internal successors, (18810), 38 states have internal predecessors, (18810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:41,808 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1581 flow. Second operand 37 states and 7772 transitions. [2023-09-01 04:08:41,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 861 transitions, 7333 flow [2023-09-01 04:08:49,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 861 transitions, 7201 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:08:49,721 INFO L231 Difference]: Finished difference. Result has 195 places, 256 transitions, 3070 flow [2023-09-01 04:08:49,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3070, PETRI_PLACES=195, PETRI_TRANSITIONS=256} [2023-09-01 04:08:49,722 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 130 predicate places. [2023-09-01 04:08:49,722 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 256 transitions, 3070 flow [2023-09-01 04:08:49,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:49,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:08:49,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:08:49,731 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 (20)] Forceful destruction successful, exit code 0 [2023-09-01 04:08:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:08:49,924 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:08:49,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:08:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 879343775, now seen corresponding path program 1 times [2023-09-01 04:08:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:08:49,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547890264] [2023-09-01 04:08:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:08:49,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:08:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:08:49,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:08:49,926 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 (21)] Waiting until timeout for monitored process [2023-09-01 04:08:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:08:50,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 04:08:50,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:08:50,189 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 04:08:50,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 04:08:50,274 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 04:08:50,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 04:08:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:08:50,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:08:50,374 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:08:50,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:08:50,449 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-09-01 04:08:50,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 04:08:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:08:50,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:08:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:08:53,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:08:53,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547890264] [2023-09-01 04:08:53,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547890264] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:08:53,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:08:53,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:08:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121440021] [2023-09-01 04:08:53,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:08:53,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:08:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:08:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:08:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:08:58,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 495 [2023-09-01 04:08:58,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 256 transitions, 3070 flow. Second operand has 12 states, 12 states have (on average 178.0) internal successors, (2136), 12 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:08:58,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:08:58,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 495 [2023-09-01 04:08:58,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:09:04,493 WARN L222 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:09:12,431 WARN L222 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:09:13,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:09:19,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:09:32,526 WARN L222 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:10:15,091 INFO L130 PetriNetUnfolder]: 173088/232111 cut-off events. [2023-09-01 04:10:15,091 INFO L131 PetriNetUnfolder]: For 385813/400048 co-relation queries the response was YES. [2023-09-01 04:10:18,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688803 conditions, 232111 events. 173088/232111 cut-off events. For 385813/400048 co-relation queries the response was YES. Maximal size of possible extension queue 4746. Compared 1618231 event pairs, 60151 based on Foata normal form. 14377/179142 useless extension candidates. Maximal degree in co-relation 688731. Up to 61052 conditions per place. [2023-09-01 04:10:19,262 INFO L137 encePairwiseOnDemand]: 479/495 looper letters, 472 selfloop transitions, 156 changer transitions 0/636 dead transitions. [2023-09-01 04:10:19,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 636 transitions, 5940 flow [2023-09-01 04:10:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 04:10:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 04:10:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4651 transitions. [2023-09-01 04:10:19,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914983164983165 [2023-09-01 04:10:19,269 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4651 transitions. [2023-09-01 04:10:19,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4651 transitions. [2023-09-01 04:10:19,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:10:19,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4651 transitions. [2023-09-01 04:10:19,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 193.79166666666666) internal successors, (4651), 24 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:19,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:19,283 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 495.0) internal successors, (12375), 25 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:19,283 INFO L175 Difference]: Start difference. First operand has 195 places, 256 transitions, 3070 flow. Second operand 24 states and 4651 transitions. [2023-09-01 04:10:19,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 636 transitions, 5940 flow [2023-09-01 04:10:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 636 transitions, 5549 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-09-01 04:10:26,565 INFO L231 Difference]: Finished difference. Result has 212 places, 286 transitions, 3237 flow [2023-09-01 04:10:26,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3237, PETRI_PLACES=212, PETRI_TRANSITIONS=286} [2023-09-01 04:10:26,566 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 147 predicate places. [2023-09-01 04:10:26,566 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 286 transitions, 3237 flow [2023-09-01 04:10:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 178.0) internal successors, (2136), 12 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:26,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:10:26,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:10:26,575 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 (21)] Forceful destruction successful, exit code 0 [2023-09-01 04:10:26,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:10:26,767 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-09-01 04:10:26,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:10:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 879343777, now seen corresponding path program 1 times [2023-09-01 04:10:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:10:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286899447] [2023-09-01 04:10:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:10:26,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:10:26,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:10:26,769 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:10:26,769 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 (22)] Waiting until timeout for monitored process [2023-09-01 04:10:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:10:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 04:10:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:10:27,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-09-01 04:10:27,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-09-01 04:10:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:10:27,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 04:10:27,074 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:10:27,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-09-01 04:10:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:10:27,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:10:27,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 04:10:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:10:27,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:10:27,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286899447] [2023-09-01 04:10:27,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286899447] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:10:27,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:10:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 04:10:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67111765] [2023-09-01 04:10:27,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 04:10:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 04:10:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:10:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 04:10:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 04:10:31,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:33,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:36,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:10:38,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:40,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:43,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:46,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:48,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:51,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:53,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:55,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 04:10:55,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 495 [2023-09-01 04:10:55,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 286 transitions, 3237 flow. Second operand has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:10:55,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:10:55,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 495 [2023-09-01 04:10:55,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:11:12,212 WARN L222 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 40 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 04:11:19,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 04:11:26,693 WARN L222 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)