./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:47:01,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:47:01,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:47:01,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:47:01,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:47:01,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:47:01,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:47:01,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:47:01,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:47:01,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:47:01,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:47:01,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:47:01,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:47:01,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:47:01,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:47:01,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:47:01,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:47:01,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:47:01,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:47:01,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:47:01,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:47:01,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:47:01,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:47:01,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:47:01,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:47:01,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:47:01,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:47:01,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:47:01,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:47:01,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:47:01,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:47:01,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:47:01,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:47:01,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:47:01,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:47:01,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:47:01,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:47:01,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:47:01,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:47:01,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:47:01,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:47:01,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:47:01,160 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:47:01,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:47:01,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:47:01,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:47:01,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:47:01,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:47:01,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:47:01,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:47:01,163 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:47:01,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:47:01,163 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:47:01,164 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:47:01,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:47:01,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:47:01,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:47:01,165 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:47:01,165 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:47:01,165 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:47:01,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:47:01,166 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:47:01,166 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:47:01,166 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:47:01,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:47:01,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:47:01,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:47:01,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:47:01,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:47:01,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:47:01,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:47:01,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:47:01,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:47:01,169 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:47:01,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:47:01,169 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:47:01,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:47:01,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:47:01,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:47:01,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:47:01,513 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:47:01,513 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:47:01,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-29 22:47:02,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:47:02,929 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:47:02,930 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-29 22:47:02,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca58224c6/1dba7f39edc948b0993ffa91329556b3/FLAG6dbbca998 [2023-08-29 22:47:02,959 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca58224c6/1dba7f39edc948b0993ffa91329556b3 [2023-08-29 22:47:02,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:47:02,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:47:02,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:47:02,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:47:02,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:47:02,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:47:02" (1/1) ... [2023-08-29 22:47:02,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cab0378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:02, skipping insertion in model container [2023-08-29 22:47:02,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:47:02" (1/1) ... [2023-08-29 22:47:02,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:47:03,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:47:03,184 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-29 22:47:03,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:47:03,211 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 22:47:03,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@348b4953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:03, skipping insertion in model container [2023-08-29 22:47:03,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:47:03,214 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 22:47:03,216 INFO L158 Benchmark]: Toolchain (without parser) took 252.48ms. Allocated memory is still 88.1MB. Free memory was 68.1MB in the beginning and 58.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:47:03,216 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 37.2MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 22:47:03,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.72ms. Allocated memory is still 88.1MB. Free memory was 67.9MB in the beginning and 58.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 22:47:03,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 37.2MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.72ms. Allocated memory is still 88.1MB. Free memory was 67.9MB in the beginning and 58.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 122]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.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 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:47:04,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:47:04,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:47:04,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:47:04,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:47:04,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:47:04,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:47:04,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:47:04,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:47:04,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:47:04,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:47:04,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:47:04,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:47:04,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:47:04,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:47:04,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:47:04,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:47:04,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:47:04,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:47:04,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:47:04,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:47:04,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:47:04,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:47:04,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:47:04,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:47:04,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:47:04,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:47:04,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:47:04,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:47:04,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:47:04,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:47:04,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:47:04,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:47:04,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:47:04,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:47:04,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:47:04,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:47:04,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:47:04,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:47:04,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:47:04,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:47:04,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 22:47:04,957 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:47:04,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:47:04,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:47:04,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:47:04,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:47:04,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:47:04,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:47:04,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:47:04,961 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:47:04,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:47:04,962 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:47:04,962 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:47:04,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:47:04,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:47:04,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:47:04,964 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 22:47:04,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 22:47:04,964 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:47:04,964 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:47:04,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:47:04,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:47:04,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:47:04,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:47:04,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:47:04,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:47:04,966 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 22:47:04,966 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 22:47:04,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:47:04,966 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:47:04,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:47:04,967 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 22:47:04,967 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:47:04,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:47:05,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:47:05,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:47:05,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:47:05,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:47:05,234 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:47:05,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-29 22:47:06,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:47:06,613 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:47:06,614 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-29 22:47:06,619 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e3086f9/5af3299a73c64026ac4951ec6859015c/FLAG360949e54 [2023-08-29 22:47:06,635 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e3086f9/5af3299a73c64026ac4951ec6859015c [2023-08-29 22:47:06,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:47:06,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:47:06,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:47:06,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:47:06,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:47:06,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:06,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c1a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06, skipping insertion in model container [2023-08-29 22:47:06,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:06,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:47:06,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:47:06,867 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-29 22:47:06,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:47:06,885 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 22:47:06,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:47:06,915 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-29 22:47:06,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:47:06,930 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:47:06,954 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-29 22:47:06,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:47:06,971 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:47:06,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06 WrapperNode [2023-08-29 22:47:06,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:47:06,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:47:06,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:47:06,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:47:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:06,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,025 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2023-08-29 22:47:07,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:47:07,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:47:07,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:47:07,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:47:07,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:47:07,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:47:07,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:47:07,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:47:07,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (1/1) ... [2023-08-29 22:47:07,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:47:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:47:07,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:47:07,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:47:07,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:47:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 22:47:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:47:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 22:47:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:47:07,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:47:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:47:07,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:47:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:47:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:47:07,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:47:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:47:07,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 22:47:07,175 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:47:07,326 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:47:07,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:47:07,845 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:47:07,854 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:47:07,854 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 22:47:07,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:47:07 BoogieIcfgContainer [2023-08-29 22:47:07,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:47:07,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:47:07,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:47:07,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:47:07,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:47:06" (1/3) ... [2023-08-29 22:47:07,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50be697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:47:07, skipping insertion in model container [2023-08-29 22:47:07,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:47:06" (2/3) ... [2023-08-29 22:47:07,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50be697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:47:07, skipping insertion in model container [2023-08-29 22:47:07,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:47:07" (3/3) ... [2023-08-29 22:47:07,863 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-08-29 22:47:07,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:47:07,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-29 22:47:07,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:47:08,003 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:47:08,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 265 transitions, 546 flow [2023-08-29 22:47:08,129 INFO L130 PetriNetUnfolder]: 19/263 cut-off events. [2023-08-29 22:47:08,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:47:08,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 263 events. 19/263 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 523 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-08-29 22:47:08,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 265 transitions, 546 flow [2023-08-29 22:47:08,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 259 transitions, 530 flow [2023-08-29 22:47:08,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:47:08,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 259 transitions, 530 flow [2023-08-29 22:47:08,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 259 transitions, 530 flow [2023-08-29 22:47:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 259 transitions, 530 flow [2023-08-29 22:47:08,226 INFO L130 PetriNetUnfolder]: 19/259 cut-off events. [2023-08-29 22:47:08,226 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:47:08,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 259 events. 19/259 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 525 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-08-29 22:47:08,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 11136 [2023-08-29 22:47:21,938 INFO L134 LiptonReduction]: Checked pairs total: 10233 [2023-08-29 22:47:21,938 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-29 22:47:21,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:47:21,954 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;@c3f36cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:47:21,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 22:47:21,957 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:47:21,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:47:21,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:21,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:47:21,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:21,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash 34072, now seen corresponding path program 1 times [2023-08-29 22:47:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:21,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422607865] [2023-08-29 22:47:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:21,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:21,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 22:47:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:47:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:22,225 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:47:22,226 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:47:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:22,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:22,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:22,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422607865] [2023-08-29 22:47:22,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422607865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:22,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:22,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495010227] [2023-08-29 22:47:22,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:22,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:22,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-29 22:47:22,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:22,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-29 22:47:22,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:22,589 INFO L130 PetriNetUnfolder]: 217/364 cut-off events. [2023-08-29 22:47:22,589 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 22:47:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 364 events. 217/364 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1270 event pairs, 168 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 640. Up to 364 conditions per place. [2023-08-29 22:47:22,592 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 22:47:22,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 132 flow [2023-08-29 22:47:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-29 22:47:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460260972716489 [2023-08-29 22:47:22,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-29 22:47:22,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-29 22:47:22,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:22,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-29 22:47:22,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,629 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 752 transitions. [2023-08-29 22:47:22,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 132 flow [2023-08-29 22:47:22,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:47:22,636 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 66 flow [2023-08-29 22:47:22,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-29 22:47:22,642 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-08-29 22:47:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 66 flow [2023-08-29 22:47:22,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:22,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:47:22,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:22,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:22,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:22,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 34175, now seen corresponding path program 1 times [2023-08-29 22:47:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:22,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180843147] [2023-08-29 22:47:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:22,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:22,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:22,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 22:47:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:47:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:22,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:22,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180843147] [2023-08-29 22:47:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180843147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:22,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:22,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985522879] [2023-08-29 22:47:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:22,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 562 [2023-08-29 22:47:22,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:22,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:22,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 562 [2023-08-29 22:47:22,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:23,135 INFO L130 PetriNetUnfolder]: 217/366 cut-off events. [2023-08-29 22:47:23,137 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:47:23,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 366 events. 217/366 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1260 event pairs, 168 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 736. Up to 365 conditions per place. [2023-08-29 22:47:23,139 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 30 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-29 22:47:23,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 134 flow [2023-08-29 22:47:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-29 22:47:23,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513641755634638 [2023-08-29 22:47:23,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-29 22:47:23,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-29 22:47:23,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:23,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-29 22:47:23,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,148 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 66 flow. Second operand 3 states and 761 transitions. [2023-08-29 22:47:23,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 134 flow [2023-08-29 22:47:23,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:23,150 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 81 flow [2023-08-29 22:47:23,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-29 22:47:23,151 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-29 22:47:23,151 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 81 flow [2023-08-29 22:47:23,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:23,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:47:23,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:23,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:23,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:23,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 34073, now seen corresponding path program 1 times [2023-08-29 22:47:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:23,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432952430] [2023-08-29 22:47:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:23,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:23,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:23,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 22:47:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:23,472 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:23,472 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:23,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:23,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:23,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432952430] [2023-08-29 22:47:23,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432952430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:23,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:23,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771238635] [2023-08-29 22:47:23,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:23,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 562 [2023-08-29 22:47:23,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:23,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 562 [2023-08-29 22:47:23,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:23,772 INFO L130 PetriNetUnfolder]: 217/365 cut-off events. [2023-08-29 22:47:23,773 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:47:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 365 events. 217/365 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1258 event pairs, 168 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 740. Up to 365 conditions per place. [2023-08-29 22:47:23,775 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-29 22:47:23,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 143 flow [2023-08-29 22:47:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-29 22:47:23,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442467378410439 [2023-08-29 22:47:23,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-29 22:47:23,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-29 22:47:23,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:23,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-29 22:47:23,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,784 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 81 flow. Second operand 3 states and 749 transitions. [2023-08-29 22:47:23,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 143 flow [2023-08-29 22:47:23,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:23,785 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 85 flow [2023-08-29 22:47:23,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-29 22:47:23,786 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-29 22:47:23,786 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 85 flow [2023-08-29 22:47:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:23,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:23,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:47:23,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:23,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:23,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:23,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1059398, now seen corresponding path program 1 times [2023-08-29 22:47:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248114763] [2023-08-29 22:47:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:23,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:23,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:24,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 22:47:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 22:47:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:24,105 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:24,105 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:24,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:24,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248114763] [2023-08-29 22:47:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248114763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:24,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:47:24,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509163933] [2023-08-29 22:47:24,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-29 22:47:24,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:24,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:24,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-29 22:47:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:25,298 INFO L130 PetriNetUnfolder]: 649/1089 cut-off events. [2023-08-29 22:47:25,298 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 22:47:25,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1089 events. 649/1089 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5071 event pairs, 504 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2209. Up to 365 conditions per place. [2023-08-29 22:47:25,303 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-29 22:47:25,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 87 transitions, 395 flow [2023-08-29 22:47:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1274 transitions. [2023-08-29 22:47:25,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533807829181495 [2023-08-29 22:47:25,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1274 transitions. [2023-08-29 22:47:25,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1274 transitions. [2023-08-29 22:47:25,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:25,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1274 transitions. [2023-08-29 22:47:25,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,316 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 85 flow. Second operand 5 states and 1274 transitions. [2023-08-29 22:47:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 87 transitions, 395 flow [2023-08-29 22:47:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 87 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:25,318 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 107 flow [2023-08-29 22:47:25,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-29 22:47:25,319 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-08-29 22:47:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 107 flow [2023-08-29 22:47:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:47:25,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:25,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:25,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:25,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1059500, now seen corresponding path program 1 times [2023-08-29 22:47:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008224971] [2023-08-29 22:47:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:25,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:25,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:25,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 22:47:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:47:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:25,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:25,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008224971] [2023-08-29 22:47:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008224971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:25,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:25,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 22:47:25,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100334679] [2023-08-29 22:47:25,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:25,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:25,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:25,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:25,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-29 22:47:25,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:25,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-29 22:47:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:25,976 INFO L130 PetriNetUnfolder]: 217/367 cut-off events. [2023-08-29 22:47:25,976 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 22:47:25,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 367 events. 217/367 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1263 event pairs, 168 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 754. Up to 364 conditions per place. [2023-08-29 22:47:25,978 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-29 22:47:25,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-08-29 22:47:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1239 transitions. [2023-08-29 22:47:25,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409252669039146 [2023-08-29 22:47:25,982 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1239 transitions. [2023-08-29 22:47:25,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1239 transitions. [2023-08-29 22:47:25,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:25,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1239 transitions. [2023-08-29 22:47:25,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,991 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 107 flow. Second operand 5 states and 1239 transitions. [2023-08-29 22:47:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-08-29 22:47:25,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 163 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:25,993 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 124 flow [2023-08-29 22:47:25,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-29 22:47:25,994 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-29 22:47:25,994 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 124 flow [2023-08-29 22:47:25,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:25,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:25,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-29 22:47:26,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:26,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:26,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:26,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181798, now seen corresponding path program 2 times [2023-08-29 22:47:26,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:26,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667332263] [2023-08-29 22:47:26,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:26,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:26,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 22:47:26,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:26,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:47:26,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667332263] [2023-08-29 22:47:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667332263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:26,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:26,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:47:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128687123] [2023-08-29 22:47:26,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:47:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:47:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:47:26,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-29 22:47:26,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:26,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-29 22:47:26,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:26,954 INFO L130 PetriNetUnfolder]: 216/365 cut-off events. [2023-08-29 22:47:26,955 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:47:26,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 365 events. 216/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1254 event pairs, 168 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 752. Up to 362 conditions per place. [2023-08-29 22:47:26,956 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-29 22:47:26,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2023-08-29 22:47:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:47:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:47:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1473 transitions. [2023-08-29 22:47:26,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43683274021352314 [2023-08-29 22:47:26,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1473 transitions. [2023-08-29 22:47:26,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1473 transitions. [2023-08-29 22:47:26,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:26,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1473 transitions. [2023-08-29 22:47:26,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 245.5) internal successors, (1473), 6 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,969 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,969 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 124 flow. Second operand 6 states and 1473 transitions. [2023-08-29 22:47:26,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2023-08-29 22:47:26,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 153 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 22:47:26,971 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 99 flow [2023-08-29 22:47:26,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-29 22:47:26,971 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-29 22:47:26,972 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 99 flow [2023-08-29 22:47:26,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:26,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:26,973 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-29 22:47:26,987 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 [2023-08-29 22:47:27,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:27,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:27,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181900, now seen corresponding path program 2 times [2023-08-29 22:47:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294987326] [2023-08-29 22:47:27,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:27,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:27,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 22:47:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:47:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:47:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:47:27,281 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-29 22:47:27,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2023-08-29 22:47:27,291 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 10 treesize of output 8 [2023-08-29 22:47:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:27,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:27,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:27,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294987326] [2023-08-29 22:47:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294987326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:27,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:27,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004405081] [2023-08-29 22:47:27,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:27,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 562 [2023-08-29 22:47:27,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:27,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:27,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 562 [2023-08-29 22:47:27,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:27,624 INFO L130 PetriNetUnfolder]: 166/289 cut-off events. [2023-08-29 22:47:27,624 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:47:27,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 289 events. 166/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 936 event pairs, 128 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 593. Up to 289 conditions per place. [2023-08-29 22:47:27,625 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 22:47:27,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 147 flow [2023-08-29 22:47:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-29 22:47:27,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424673784104389 [2023-08-29 22:47:27,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-29 22:47:27,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-29 22:47:27,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:27,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-29 22:47:27,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:27,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:27,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:27,632 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 99 flow. Second operand 3 states and 746 transitions. [2023-08-29 22:47:27,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 147 flow [2023-08-29 22:47:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:47:27,634 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 84 flow [2023-08-29 22:47:27,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-29 22:47:27,634 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-08-29 22:47:27,634 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 84 flow [2023-08-29 22:47:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:27,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:27,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-29 22:47:27,647 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 [2023-08-29 22:47:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:27,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:27,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181902, now seen corresponding path program 1 times [2023-08-29 22:47:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:27,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612424976] [2023-08-29 22:47:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:27,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:27,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 22:47:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:47:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:27,955 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:47:27,955 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 22 treesize of output 29 [2023-08-29 22:47:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:28,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:28,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612424976] [2023-08-29 22:47:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612424976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:28,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670767342] [2023-08-29 22:47:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:28,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-29 22:47:28,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:28,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-29 22:47:28,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:28,227 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-08-29 22:47:28,227 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:47:28,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 213 events. 116/213 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 630 event pairs, 88 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 436. Up to 213 conditions per place. [2023-08-29 22:47:28,228 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 22:47:28,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 128 flow [2023-08-29 22:47:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-29 22:47:28,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430604982206406 [2023-08-29 22:47:28,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-29 22:47:28,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-29 22:47:28,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:28,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-29 22:47:28,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,236 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 84 flow. Second operand 3 states and 747 transitions. [2023-08-29 22:47:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 128 flow [2023-08-29 22:47:28,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:28,237 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 75 flow [2023-08-29 22:47:28,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 22:47:28,238 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-29 22:47:28,238 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 75 flow [2023-08-29 22:47:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:28,239 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-08-29 22:47:28,252 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 [2023-08-29 22:47:28,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:28,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -779712712, now seen corresponding path program 1 times [2023-08-29 22:47:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393715920] [2023-08-29 22:47:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:28,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:28,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:28,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 22:47:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:28,559 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-29 22:47:28,560 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-29 22:47:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:28,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:28,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:28,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393715920] [2023-08-29 22:47:28,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393715920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:28,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:28,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:28,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803591073] [2023-08-29 22:47:28,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:28,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:28,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:28,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-29 22:47:28,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:28,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-29 22:47:28,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:28,732 INFO L130 PetriNetUnfolder]: 106/193 cut-off events. [2023-08-29 22:47:28,732 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:47:28,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 193 events. 106/193 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 563 event pairs, 80 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 396. Up to 193 conditions per place. [2023-08-29 22:47:28,733 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 22:47:28,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 25 transitions, 121 flow [2023-08-29 22:47:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-08-29 22:47:28,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365361803084223 [2023-08-29 22:47:28,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-08-29 22:47:28,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-08-29 22:47:28,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:28,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-08-29 22:47:28,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,740 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 75 flow. Second operand 3 states and 736 transitions. [2023-08-29 22:47:28,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 25 transitions, 121 flow [2023-08-29 22:47:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:28,741 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-08-29 22:47:28,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-29 22:47:28,742 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-29 22:47:28,742 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-08-29 22:47:28,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:28,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:28,742 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-08-29 22:47:28,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:28,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:28,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:28,943 INFO L85 PathProgramCache]: Analyzing trace with hash -779712711, now seen corresponding path program 1 times [2023-08-29 22:47:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790855931] [2023-08-29 22:47:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:28,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:28,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 22:47:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:47:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:47:29,075 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-29 22:47:29,076 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 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-29 22:47:29,087 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 42 treesize of output 38 [2023-08-29 22:47:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:29,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:29,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790855931] [2023-08-29 22:47:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790855931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:29,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:29,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:47:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751252271] [2023-08-29 22:47:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:47:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:47:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:47:29,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-29 22:47:29,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:29,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-29 22:47:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:29,278 INFO L130 PetriNetUnfolder]: 96/173 cut-off events. [2023-08-29 22:47:29,278 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:47:29,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 173 events. 96/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 477 event pairs, 72 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 356. Up to 173 conditions per place. [2023-08-29 22:47:29,279 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-29 22:47:29,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 23 transitions, 114 flow [2023-08-29 22:47:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:47:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:47:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-29 22:47:29,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44068801897983395 [2023-08-29 22:47:29,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-29 22:47:29,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-29 22:47:29,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:29,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-29 22:47:29,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,287 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 72 flow. Second operand 3 states and 743 transitions. [2023-08-29 22:47:29,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 23 transitions, 114 flow [2023-08-29 22:47:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 23 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:29,288 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 69 flow [2023-08-29 22:47:29,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-29 22:47:29,289 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-29 22:47:29,292 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 69 flow [2023-08-29 22:47:29,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:29,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-08-29 22:47:29,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:29,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:29,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:29,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1598711344, now seen corresponding path program 1 times [2023-08-29 22:47:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:29,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322918139] [2023-08-29 22:47:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:29,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:29,507 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:29,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 22:47:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:47:29,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:29,637 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:29,638 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:29,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:29,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322918139] [2023-08-29 22:47:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322918139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:29,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:29,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:47:29,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611362253] [2023-08-29 22:47:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:29,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:29,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:29,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:29,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-29 22:47:29,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:29,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:29,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-29 22:47:29,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:30,011 INFO L130 PetriNetUnfolder]: 157/282 cut-off events. [2023-08-29 22:47:30,012 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:47:30,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 282 events. 157/282 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1025 event pairs, 72 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 577. Up to 169 conditions per place. [2023-08-29 22:47:30,013 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-29 22:47:30,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 178 flow [2023-08-29 22:47:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1207 transitions. [2023-08-29 22:47:30,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295373665480427 [2023-08-29 22:47:30,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1207 transitions. [2023-08-29 22:47:30,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1207 transitions. [2023-08-29 22:47:30,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:30,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1207 transitions. [2023-08-29 22:47:30,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.4) internal successors, (1207), 5 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,024 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 69 flow. Second operand 5 states and 1207 transitions. [2023-08-29 22:47:30,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 178 flow [2023-08-29 22:47:30,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:30,025 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 84 flow [2023-08-29 22:47:30,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2023-08-29 22:47:30,026 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-29 22:47:30,026 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 84 flow [2023-08-29 22:47:30,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:30,027 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-08-29 22:47:30,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:30,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:30,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1598711343, now seen corresponding path program 1 times [2023-08-29 22:47:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021697758] [2023-08-29 22:47:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:30,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:30,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:30,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 22:47:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:47:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:30,349 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-29 22:47:30,349 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-29 22:47:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:30,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:30,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:30,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021697758] [2023-08-29 22:47:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021697758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:30,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:30,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:47:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698841890] [2023-08-29 22:47:30,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:30,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:47:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:47:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:47:30,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-29 22:47:30,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:30,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-29 22:47:30,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:30,596 INFO L130 PetriNetUnfolder]: 101/186 cut-off events. [2023-08-29 22:47:30,596 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-29 22:47:30,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 186 events. 101/186 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 525 event pairs, 75 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 434. Up to 182 conditions per place. [2023-08-29 22:47:30,597 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 20 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-08-29 22:47:30,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 22 transitions, 124 flow [2023-08-29 22:47:30,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:47:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:47:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 957 transitions. [2023-08-29 22:47:30,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42571174377224197 [2023-08-29 22:47:30,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 957 transitions. [2023-08-29 22:47:30,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 957 transitions. [2023-08-29 22:47:30,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:30,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 957 transitions. [2023-08-29 22:47:30,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,610 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 84 flow. Second operand 4 states and 957 transitions. [2023-08-29 22:47:30,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 22 transitions, 124 flow [2023-08-29 22:47:30,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 22 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:30,611 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 78 flow [2023-08-29 22:47:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2023-08-29 22:47:30,612 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-29 22:47:30,612 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 78 flow [2023-08-29 22:47:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:30,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:30,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:30,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:30,822 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:30,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1979554837, now seen corresponding path program 1 times [2023-08-29 22:47:30,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:30,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016201801] [2023-08-29 22:47:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:30,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:30,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:30,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-29 22:47:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:47:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:30,965 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:30,965 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:31,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:31,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016201801] [2023-08-29 22:47:31,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016201801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:31,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:31,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:47:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312567254] [2023-08-29 22:47:31,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:47:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:47:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:47:32,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-29 22:47:32,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 78 flow. Second operand has 10 states, 10 states have (on average 234.4) internal successors, (2344), 10 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:32,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:32,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-29 22:47:32,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:32,845 INFO L130 PetriNetUnfolder]: 173/318 cut-off events. [2023-08-29 22:47:32,845 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 22:47:32,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 318 events. 173/318 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1231 event pairs, 45 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 712. Up to 116 conditions per place. [2023-08-29 22:47:32,847 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 54 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-08-29 22:47:32,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 287 flow [2023-08-29 22:47:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:47:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:47:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1691 transitions. [2023-08-29 22:47:32,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298423995932893 [2023-08-29 22:47:32,851 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1691 transitions. [2023-08-29 22:47:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1691 transitions. [2023-08-29 22:47:32,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:32,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1691 transitions. [2023-08-29 22:47:32,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 241.57142857142858) internal successors, (1691), 7 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:32,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:32,860 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:32,860 INFO L175 Difference]: Start difference. First operand has 36 places, 22 transitions, 78 flow. Second operand 7 states and 1691 transitions. [2023-08-29 22:47:32,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 287 flow [2023-08-29 22:47:32,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:32,862 INFO L231 Difference]: Finished difference. Result has 42 places, 24 transitions, 105 flow [2023-08-29 22:47:32,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2023-08-29 22:47:32,862 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-29 22:47:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 105 flow [2023-08-29 22:47:32,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.4) internal successors, (2344), 10 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:32,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:32,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:32,877 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 [2023-08-29 22:47:33,073 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 [2023-08-29 22:47:33,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:33,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1237466930, now seen corresponding path program 1 times [2023-08-29 22:47:33,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:33,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169703990] [2023-08-29 22:47:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:33,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:33,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:33,075 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) [2023-08-29 22:47:33,076 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 [2023-08-29 22:47:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:47:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:33,203 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:33,204 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:33,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:33,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:33,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169703990] [2023-08-29 22:47:33,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169703990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:33,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:33,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:47:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563516609] [2023-08-29 22:47:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:33,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:33,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:33,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-29 22:47:33,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:33,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:33,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-29 22:47:33,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:33,637 INFO L130 PetriNetUnfolder]: 249/458 cut-off events. [2023-08-29 22:47:33,637 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2023-08-29 22:47:33,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 458 events. 249/458 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1896 event pairs, 135 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1143. Up to 314 conditions per place. [2023-08-29 22:47:33,640 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-29 22:47:33,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 241 flow [2023-08-29 22:47:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1201 transitions. [2023-08-29 22:47:33,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274021352313167 [2023-08-29 22:47:33,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1201 transitions. [2023-08-29 22:47:33,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1201 transitions. [2023-08-29 22:47:33,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:33,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1201 transitions. [2023-08-29 22:47:33,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:33,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:33,651 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:33,651 INFO L175 Difference]: Start difference. First operand has 42 places, 24 transitions, 105 flow. Second operand 5 states and 1201 transitions. [2023-08-29 22:47:33,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 241 flow [2023-08-29 22:47:33,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 226 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:33,653 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 112 flow [2023-08-29 22:47:33,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-08-29 22:47:33,654 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2023-08-29 22:47:33,654 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 112 flow [2023-08-29 22:47:33,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:33,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:33,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-29 22:47:33,667 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 (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:33,864 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 [2023-08-29 22:47:33,865 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:33,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash 318347403, now seen corresponding path program 2 times [2023-08-29 22:47:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:33,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618653646] [2023-08-29 22:47:33,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:33,867 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) [2023-08-29 22:47:33,908 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 [2023-08-29 22:47:33,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:33,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:33,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:47:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:34,031 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:34,031 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:34,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:34,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618653646] [2023-08-29 22:47:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618653646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:34,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:34,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-08-29 22:47:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632873915] [2023-08-29 22:47:34,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 22:47:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:34,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 22:47:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:47:36,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-29 22:47:36,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 112 flow. Second operand has 12 states, 12 states have (on average 234.5) internal successors, (2814), 12 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:36,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:36,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-29 22:47:36,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:36,747 INFO L130 PetriNetUnfolder]: 215/410 cut-off events. [2023-08-29 22:47:36,747 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-29 22:47:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 410 events. 215/410 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1809 event pairs, 5 based on Foata normal form. 28/412 useless extension candidates. Maximal degree in co-relation 1065. Up to 96 conditions per place. [2023-08-29 22:47:36,750 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 64 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2023-08-29 22:47:36,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 382 flow [2023-08-29 22:47:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:47:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:47:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1929 transitions. [2023-08-29 22:47:36,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290480427046263 [2023-08-29 22:47:36,755 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1929 transitions. [2023-08-29 22:47:36,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1929 transitions. [2023-08-29 22:47:36,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:36,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1929 transitions. [2023-08-29 22:47:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 241.125) internal successors, (1929), 8 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:36,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:36,765 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:36,765 INFO L175 Difference]: Start difference. First operand has 44 places, 25 transitions, 112 flow. Second operand 8 states and 1929 transitions. [2023-08-29 22:47:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 382 flow [2023-08-29 22:47:36,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 359 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:47:36,767 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 95 flow [2023-08-29 22:47:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2023-08-29 22:47:36,768 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-29 22:47:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 95 flow [2023-08-29 22:47:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 234.5) internal successors, (2814), 12 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:36,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:36,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:36,783 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 [2023-08-29 22:47:36,980 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 [2023-08-29 22:47:36,980 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:36,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash 293231830, now seen corresponding path program 1 times [2023-08-29 22:47:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399161974] [2023-08-29 22:47:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:36,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:36,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:36,982 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) [2023-08-29 22:47:36,982 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 [2023-08-29 22:47:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 22:47:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:37,117 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:47:37,117 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-29 22:47:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:37,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:37,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:37,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399161974] [2023-08-29 22:47:37,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399161974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:37,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:37,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-29 22:47:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870862220] [2023-08-29 22:47:37,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:37,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:47:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:47:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:47:38,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-29 22:47:38,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 95 flow. Second operand has 10 states, 10 states have (on average 234.8) internal successors, (2348), 10 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:38,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:38,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-29 22:47:38,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:38,856 INFO L130 PetriNetUnfolder]: 347/662 cut-off events. [2023-08-29 22:47:38,856 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-29 22:47:38,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 662 events. 347/662 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3101 event pairs, 123 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 1650. Up to 280 conditions per place. [2023-08-29 22:47:38,860 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-08-29 22:47:38,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 333 flow [2023-08-29 22:47:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:47:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:47:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1681 transitions. [2023-08-29 22:47:38,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42730045754956786 [2023-08-29 22:47:38,865 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1681 transitions. [2023-08-29 22:47:38,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1681 transitions. [2023-08-29 22:47:38,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:38,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1681 transitions. [2023-08-29 22:47:38,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 240.14285714285714) internal successors, (1681), 7 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:38,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:38,873 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:38,874 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 95 flow. Second operand 7 states and 1681 transitions. [2023-08-29 22:47:38,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 333 flow [2023-08-29 22:47:38,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 301 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:47:38,875 INFO L231 Difference]: Finished difference. Result has 45 places, 25 transitions, 114 flow [2023-08-29 22:47:38,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=25} [2023-08-29 22:47:38,876 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-29 22:47:38,876 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 25 transitions, 114 flow [2023-08-29 22:47:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.8) internal successors, (2348), 10 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:38,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:38,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:38,887 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 (17)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:39,087 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 [2023-08-29 22:47:39,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:39,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:39,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1672021034, now seen corresponding path program 2 times [2023-08-29 22:47:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033592642] [2023-08-29 22:47:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:39,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:39,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:39,089 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) [2023-08-29 22:47:39,092 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 [2023-08-29 22:47:39,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:39,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:39,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033592642] [2023-08-29 22:47:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033592642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:47:39,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:47:39,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-29 22:47:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142209804] [2023-08-29 22:47:39,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:47:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:47:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:47:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 22:47:39,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 562 [2023-08-29 22:47:39,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 25 transitions, 114 flow. Second operand has 10 states, 10 states have (on average 243.6) internal successors, (2436), 10 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:39,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:39,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 562 [2023-08-29 22:47:39,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:39,795 INFO L130 PetriNetUnfolder]: 288/577 cut-off events. [2023-08-29 22:47:39,796 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-08-29 22:47:39,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 577 events. 288/577 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2729 event pairs, 24 based on Foata normal form. 52/629 useless extension candidates. Maximal degree in co-relation 1510. Up to 126 conditions per place. [2023-08-29 22:47:39,799 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 60 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-29 22:47:39,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 345 flow [2023-08-29 22:47:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:47:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:47:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1506 transitions. [2023-08-29 22:47:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-08-29 22:47:39,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1506 transitions. [2023-08-29 22:47:39,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1506 transitions. [2023-08-29 22:47:39,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:39,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1506 transitions. [2023-08-29 22:47:39,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:39,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:39,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:39,810 INFO L175 Difference]: Start difference. First operand has 45 places, 25 transitions, 114 flow. Second operand 6 states and 1506 transitions. [2023-08-29 22:47:39,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 345 flow [2023-08-29 22:47:39,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 327 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 22:47:39,813 INFO L231 Difference]: Finished difference. Result has 42 places, 23 transitions, 90 flow [2023-08-29 22:47:39,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=23} [2023-08-29 22:47:39,813 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-29 22:47:39,813 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 23 transitions, 90 flow [2023-08-29 22:47:39,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 243.6) internal successors, (2436), 10 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:39,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:39,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:39,831 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 [2023-08-29 22:47:40,025 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 [2023-08-29 22:47:40,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:40,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1958708757, now seen corresponding path program 1 times [2023-08-29 22:47:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020809353] [2023-08-29 22:47:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:40,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:40,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:40,028 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) [2023-08-29 22:47:40,030 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 [2023-08-29 22:47:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:40,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:47:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:40,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:40,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020809353] [2023-08-29 22:47:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020809353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:40,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:40,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205793717] [2023-08-29 22:47:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:40,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:40,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:40,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-29 22:47:40,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 23 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:40,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:40,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-29 22:47:40,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:40,791 INFO L130 PetriNetUnfolder]: 290/588 cut-off events. [2023-08-29 22:47:40,792 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-29 22:47:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 588 events. 290/588 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2837 event pairs, 218 based on Foata normal form. 5/593 useless extension candidates. Maximal degree in co-relation 1453. Up to 442 conditions per place. [2023-08-29 22:47:40,794 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 38 selfloop transitions, 3 changer transitions 8/49 dead transitions. [2023-08-29 22:47:40,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 274 flow [2023-08-29 22:47:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2023-08-29 22:47:40,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40640569395017795 [2023-08-29 22:47:40,798 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2023-08-29 22:47:40,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2023-08-29 22:47:40,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:40,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2023-08-29 22:47:40,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:40,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:40,804 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:40,804 INFO L175 Difference]: Start difference. First operand has 42 places, 23 transitions, 90 flow. Second operand 5 states and 1142 transitions. [2023-08-29 22:47:40,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 274 flow [2023-08-29 22:47:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:47:40,806 INFO L231 Difference]: Finished difference. Result has 45 places, 24 transitions, 103 flow [2023-08-29 22:47:40,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=45, PETRI_TRANSITIONS=24} [2023-08-29 22:47:40,806 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-29 22:47:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 24 transitions, 103 flow [2023-08-29 22:47:40,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:40,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:40,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:40,821 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 [2023-08-29 22:47:41,017 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 [2023-08-29 22:47:41,017 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:41,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1017445191, now seen corresponding path program 2 times [2023-08-29 22:47:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:41,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315180182] [2023-08-29 22:47:41,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:41,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:41,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:41,019 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) [2023-08-29 22:47:41,021 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 [2023-08-29 22:47:41,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:47:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:47:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:41,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:41,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315180182] [2023-08-29 22:47:41,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315180182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:41,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324435203] [2023-08-29 22:47:41,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:41,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:41,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-29 22:47:41,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 24 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:41,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:41,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-29 22:47:41,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:41,735 INFO L130 PetriNetUnfolder]: 284/580 cut-off events. [2023-08-29 22:47:41,735 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2023-08-29 22:47:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 580 events. 284/580 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2748 event pairs, 218 based on Foata normal form. 3/583 useless extension candidates. Maximal degree in co-relation 1583. Up to 452 conditions per place. [2023-08-29 22:47:41,738 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 41 selfloop transitions, 3 changer transitions 6/50 dead transitions. [2023-08-29 22:47:41,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 304 flow [2023-08-29 22:47:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1140 transitions. [2023-08-29 22:47:41,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40569395017793597 [2023-08-29 22:47:41,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1140 transitions. [2023-08-29 22:47:41,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1140 transitions. [2023-08-29 22:47:41,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:41,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1140 transitions. [2023-08-29 22:47:41,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.0) internal successors, (1140), 5 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) [2023-08-29 22:47:41,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:41,748 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:41,748 INFO L175 Difference]: Start difference. First operand has 45 places, 24 transitions, 103 flow. Second operand 5 states and 1140 transitions. [2023-08-29 22:47:41,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 304 flow [2023-08-29 22:47:41,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 280 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:41,750 INFO L231 Difference]: Finished difference. Result has 48 places, 25 transitions, 113 flow [2023-08-29 22:47:41,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=25} [2023-08-29 22:47:41,751 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-08-29 22:47:41,751 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 25 transitions, 113 flow [2023-08-29 22:47:41,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:41,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:41,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:41,765 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 [2023-08-29 22:47:41,961 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 [2023-08-29 22:47:41,961 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:41,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:41,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1129783765, now seen corresponding path program 3 times [2023-08-29 22:47:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347013969] [2023-08-29 22:47:41,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:47:41,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:41,963 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) [2023-08-29 22:47:41,966 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 [2023-08-29 22:47:42,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 22:47:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:47:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:42,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:42,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:42,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347013969] [2023-08-29 22:47:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347013969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:42,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446270505] [2023-08-29 22:47:42,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:42,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:42,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-29 22:47:42,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:42,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:42,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-29 22:47:42,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:42,767 INFO L130 PetriNetUnfolder]: 294/596 cut-off events. [2023-08-29 22:47:42,768 INFO L131 PetriNetUnfolder]: For 515/515 co-relation queries the response was YES. [2023-08-29 22:47:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 596 events. 294/596 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2878 event pairs, 220 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1799. Up to 446 conditions per place. [2023-08-29 22:47:42,771 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 37 selfloop transitions, 5 changer transitions 6/48 dead transitions. [2023-08-29 22:47:42,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 303 flow [2023-08-29 22:47:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2023-08-29 22:47:42,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40427046263345195 [2023-08-29 22:47:42,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2023-08-29 22:47:42,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2023-08-29 22:47:42,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:42,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2023-08-29 22:47:42,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:42,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:42,780 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:42,780 INFO L175 Difference]: Start difference. First operand has 48 places, 25 transitions, 113 flow. Second operand 5 states and 1136 transitions. [2023-08-29 22:47:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 303 flow [2023-08-29 22:47:42,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 279 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:42,782 INFO L231 Difference]: Finished difference. Result has 51 places, 28 transitions, 142 flow [2023-08-29 22:47:42,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=28} [2023-08-29 22:47:42,783 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-08-29 22:47:42,783 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 28 transitions, 142 flow [2023-08-29 22:47:42,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:42,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:42,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:42,795 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 [2023-08-29 22:47:42,992 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 [2023-08-29 22:47:42,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:42,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2082528333, now seen corresponding path program 4 times [2023-08-29 22:47:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:42,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782594267] [2023-08-29 22:47:42,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:47:42,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:42,994 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) [2023-08-29 22:47:42,996 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 [2023-08-29 22:47:43,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:47:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:47:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:43,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:43,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:43,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782594267] [2023-08-29 22:47:43,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782594267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:43,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:43,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:43,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182997459] [2023-08-29 22:47:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:43,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:47:43,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:47:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:47:44,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-29 22:47:44,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 28 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:44,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:44,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-29 22:47:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:45,479 INFO L130 PetriNetUnfolder]: 286/578 cut-off events. [2023-08-29 22:47:45,479 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2023-08-29 22:47:45,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 578 events. 286/578 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2718 event pairs, 216 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1804. Up to 454 conditions per place. [2023-08-29 22:47:45,482 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 36 selfloop transitions, 9 changer transitions 7/52 dead transitions. [2023-08-29 22:47:45,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 348 flow [2023-08-29 22:47:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:47:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:47:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1358 transitions. [2023-08-29 22:47:45,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027283511269276 [2023-08-29 22:47:45,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1358 transitions. [2023-08-29 22:47:45,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1358 transitions. [2023-08-29 22:47:45,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:45,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1358 transitions. [2023-08-29 22:47:45,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:45,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:45,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:45,491 INFO L175 Difference]: Start difference. First operand has 51 places, 28 transitions, 142 flow. Second operand 6 states and 1358 transitions. [2023-08-29 22:47:45,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 348 flow [2023-08-29 22:47:45,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 331 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:45,494 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 208 flow [2023-08-29 22:47:45,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-29 22:47:45,494 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-08-29 22:47:45,494 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 208 flow [2023-08-29 22:47:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:45,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:45,495 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:45,505 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 (22)] Ended with exit code 0 [2023-08-29 22:47:45,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:45,705 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:45,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1185530400, now seen corresponding path program 1 times [2023-08-29 22:47:45,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:45,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084881780] [2023-08-29 22:47:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:45,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:45,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:45,707 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:45,708 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 (23)] Waiting until timeout for monitored process [2023-08-29 22:47:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:45,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:46,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084881780] [2023-08-29 22:47:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084881780] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:47:46,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:47:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-29 22:47:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136892420] [2023-08-29 22:47:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:47:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-29 22:47:46,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:46,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:46,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-29 22:47:46,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:46,739 INFO L130 PetriNetUnfolder]: 302/605 cut-off events. [2023-08-29 22:47:46,740 INFO L131 PetriNetUnfolder]: For 899/899 co-relation queries the response was YES. [2023-08-29 22:47:46,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 605 events. 302/605 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3050 event pairs, 8 based on Foata normal form. 18/623 useless extension candidates. Maximal degree in co-relation 2052. Up to 410 conditions per place. [2023-08-29 22:47:46,744 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 7 changer transitions 1/60 dead transitions. [2023-08-29 22:47:46,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 442 flow [2023-08-29 22:47:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1187 transitions. [2023-08-29 22:47:46,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224199288256228 [2023-08-29 22:47:46,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1187 transitions. [2023-08-29 22:47:46,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1187 transitions. [2023-08-29 22:47:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:46,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1187 transitions. [2023-08-29 22:47:46,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.4) internal successors, (1187), 5 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:46,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:46,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:46,760 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 208 flow. Second operand 5 states and 1187 transitions. [2023-08-29 22:47:46,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 442 flow [2023-08-29 22:47:46,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 419 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:46,764 INFO L231 Difference]: Finished difference. Result has 60 places, 35 transitions, 232 flow [2023-08-29 22:47:46,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2023-08-29 22:47:46,766 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-29 22:47:46,767 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 232 flow [2023-08-29 22:47:46,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:46,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:46,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:46,780 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 (23)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:46,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:46,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:46,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 629436663, now seen corresponding path program 1 times [2023-08-29 22:47:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49228088] [2023-08-29 22:47:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:46,980 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:46,981 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 (24)] Waiting until timeout for monitored process [2023-08-29 22:47:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:47,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:47,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49228088] [2023-08-29 22:47:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49228088] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:47:47,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:47:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-29 22:47:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437497274] [2023-08-29 22:47:47,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:47:47,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-29 22:47:47,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 35 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:47,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:47,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-29 22:47:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:47,844 INFO L130 PetriNetUnfolder]: 318/633 cut-off events. [2023-08-29 22:47:47,845 INFO L131 PetriNetUnfolder]: For 1336/1336 co-relation queries the response was YES. [2023-08-29 22:47:47,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 633 events. 318/633 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3041 event pairs, 62 based on Foata normal form. 12/645 useless extension candidates. Maximal degree in co-relation 2221. Up to 398 conditions per place. [2023-08-29 22:47:47,848 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 46 selfloop transitions, 10 changer transitions 1/57 dead transitions. [2023-08-29 22:47:47,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 443 flow [2023-08-29 22:47:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2023-08-29 22:47:47,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209964412811388 [2023-08-29 22:47:47,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2023-08-29 22:47:47,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2023-08-29 22:47:47,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:47,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2023-08-29 22:47:47,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:47,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:47,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:47,855 INFO L175 Difference]: Start difference. First operand has 60 places, 35 transitions, 232 flow. Second operand 5 states and 1183 transitions. [2023-08-29 22:47:47,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 443 flow [2023-08-29 22:47:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 428 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:47,858 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 273 flow [2023-08-29 22:47:47,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2023-08-29 22:47:47,859 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2023-08-29 22:47:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 273 flow [2023-08-29 22:47:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:47,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:47,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:47,870 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 (24)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:48,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:48,070 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:48,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1580113726, now seen corresponding path program 2 times [2023-08-29 22:47:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:48,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212395156] [2023-08-29 22:47:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:48,073 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:48,074 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 (25)] Waiting until timeout for monitored process [2023-08-29 22:47:48,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:48,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:48,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:48,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:48,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212395156] [2023-08-29 22:47:48,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212395156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:48,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:48,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:48,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144104817] [2023-08-29 22:47:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:48,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:48,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 22:47:48,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:48,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:48,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 22:47:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:48,694 INFO L130 PetriNetUnfolder]: 316/631 cut-off events. [2023-08-29 22:47:48,695 INFO L131 PetriNetUnfolder]: For 1747/1747 co-relation queries the response was YES. [2023-08-29 22:47:48,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 631 events. 316/631 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2986 event pairs, 212 based on Foata normal form. 2/633 useless extension candidates. Maximal degree in co-relation 2309. Up to 494 conditions per place. [2023-08-29 22:47:48,699 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 39 selfloop transitions, 9 changer transitions 2/50 dead transitions. [2023-08-29 22:47:48,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 418 flow [2023-08-29 22:47:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1170 transitions. [2023-08-29 22:47:48,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41637010676156583 [2023-08-29 22:47:48,702 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1170 transitions. [2023-08-29 22:47:48,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1170 transitions. [2023-08-29 22:47:48,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:48,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1170 transitions. [2023-08-29 22:47:48,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:48,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:48,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:48,707 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 273 flow. Second operand 5 states and 1170 transitions. [2023-08-29 22:47:48,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 418 flow [2023-08-29 22:47:48,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 50 transitions, 403 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:47:48,711 INFO L231 Difference]: Finished difference. Result has 67 places, 37 transitions, 281 flow [2023-08-29 22:47:48,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=67, PETRI_TRANSITIONS=37} [2023-08-29 22:47:48,711 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2023-08-29 22:47:48,712 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 37 transitions, 281 flow [2023-08-29 22:47:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:48,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:48,712 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:48,727 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 (25)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:48,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:48,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 531031767, now seen corresponding path program 2 times [2023-08-29 22:47:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:48,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425243305] [2023-08-29 22:47:48,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:47:48,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:48,925 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:48,925 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 (26)] Waiting until timeout for monitored process [2023-08-29 22:47:49,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:47:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:49,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:49,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:49,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:49,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425243305] [2023-08-29 22:47:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425243305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:49,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752030816] [2023-08-29 22:47:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:49,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 22:47:49,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 37 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:49,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:49,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 22:47:49,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:49,449 INFO L130 PetriNetUnfolder]: 331/656 cut-off events. [2023-08-29 22:47:49,449 INFO L131 PetriNetUnfolder]: For 2016/2016 co-relation queries the response was YES. [2023-08-29 22:47:49,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2491 conditions, 656 events. 331/656 cut-off events. For 2016/2016 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3119 event pairs, 228 based on Foata normal form. 12/668 useless extension candidates. Maximal degree in co-relation 2463. Up to 506 conditions per place. [2023-08-29 22:47:49,452 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2023-08-29 22:47:49,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 445 flow [2023-08-29 22:47:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1172 transitions. [2023-08-29 22:47:49,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170818505338078 [2023-08-29 22:47:49,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1172 transitions. [2023-08-29 22:47:49,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1172 transitions. [2023-08-29 22:47:49,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:49,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1172 transitions. [2023-08-29 22:47:49,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:49,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:49,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:49,460 INFO L175 Difference]: Start difference. First operand has 67 places, 37 transitions, 281 flow. Second operand 5 states and 1172 transitions. [2023-08-29 22:47:49,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 445 flow [2023-08-29 22:47:49,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 53 transitions, 425 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:49,464 INFO L231 Difference]: Finished difference. Result has 68 places, 38 transitions, 298 flow [2023-08-29 22:47:49,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=68, PETRI_TRANSITIONS=38} [2023-08-29 22:47:49,465 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2023-08-29 22:47:49,465 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 38 transitions, 298 flow [2023-08-29 22:47:49,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:49,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:49,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:49,479 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 (26)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:49,676 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:49,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 740690042, now seen corresponding path program 3 times [2023-08-29 22:47:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136015136] [2023-08-29 22:47:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:47:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:49,678 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:49,680 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 (27)] Waiting until timeout for monitored process [2023-08-29 22:47:49,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:47:49,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:49,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:47:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:50,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136015136] [2023-08-29 22:47:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136015136] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:47:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:47:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-29 22:47:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250272626] [2023-08-29 22:47:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:47:50,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-29 22:47:50,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 38 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:50,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:50,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-29 22:47:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:50,791 INFO L130 PetriNetUnfolder]: 367/722 cut-off events. [2023-08-29 22:47:50,791 INFO L131 PetriNetUnfolder]: For 2494/2494 co-relation queries the response was YES. [2023-08-29 22:47:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 722 events. 367/722 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3562 event pairs, 140 based on Foata normal form. 18/740 useless extension candidates. Maximal degree in co-relation 2789. Up to 608 conditions per place. [2023-08-29 22:47:50,796 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 47 selfloop transitions, 12 changer transitions 1/60 dead transitions. [2023-08-29 22:47:50,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 522 flow [2023-08-29 22:47:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1181 transitions. [2023-08-29 22:47:50,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202846975088968 [2023-08-29 22:47:50,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1181 transitions. [2023-08-29 22:47:50,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1181 transitions. [2023-08-29 22:47:50,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:50,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1181 transitions. [2023-08-29 22:47:50,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:50,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:50,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:50,803 INFO L175 Difference]: Start difference. First operand has 68 places, 38 transitions, 298 flow. Second operand 5 states and 1181 transitions. [2023-08-29 22:47:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 522 flow [2023-08-29 22:47:50,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 498 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 22:47:50,808 INFO L231 Difference]: Finished difference. Result has 71 places, 42 transitions, 348 flow [2023-08-29 22:47:50,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=71, PETRI_TRANSITIONS=42} [2023-08-29 22:47:50,809 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-08-29 22:47:50,809 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 42 transitions, 348 flow [2023-08-29 22:47:50,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:50,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:50,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:50,820 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 (27)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:51,020 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:51,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 686166957, now seen corresponding path program 3 times [2023-08-29 22:47:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248011629] [2023-08-29 22:47:51,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:47:51,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:51,022 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:51,023 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 (28)] Waiting until timeout for monitored process [2023-08-29 22:47:51,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 22:47:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:51,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:51,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248011629] [2023-08-29 22:47:51,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248011629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:51,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:51,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436337968] [2023-08-29 22:47:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:51,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:51,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 22:47:51,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 42 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:51,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:51,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 22:47:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:51,599 INFO L130 PetriNetUnfolder]: 355/710 cut-off events. [2023-08-29 22:47:51,599 INFO L131 PetriNetUnfolder]: For 2683/2683 co-relation queries the response was YES. [2023-08-29 22:47:51,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 710 events. 355/710 cut-off events. For 2683/2683 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3522 event pairs, 200 based on Foata normal form. 12/722 useless extension candidates. Maximal degree in co-relation 2839. Up to 480 conditions per place. [2023-08-29 22:47:51,602 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 48 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2023-08-29 22:47:51,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 62 transitions, 542 flow [2023-08-29 22:47:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1177 transitions. [2023-08-29 22:47:51,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188612099644128 [2023-08-29 22:47:51,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1177 transitions. [2023-08-29 22:47:51,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1177 transitions. [2023-08-29 22:47:51,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:51,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1177 transitions. [2023-08-29 22:47:51,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.4) internal successors, (1177), 5 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:51,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:51,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:51,608 INFO L175 Difference]: Start difference. First operand has 71 places, 42 transitions, 348 flow. Second operand 5 states and 1177 transitions. [2023-08-29 22:47:51,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 62 transitions, 542 flow [2023-08-29 22:47:51,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:47:51,614 INFO L231 Difference]: Finished difference. Result has 75 places, 42 transitions, 371 flow [2023-08-29 22:47:51,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=75, PETRI_TRANSITIONS=42} [2023-08-29 22:47:51,614 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 39 predicate places. [2023-08-29 22:47:51,614 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 42 transitions, 371 flow [2023-08-29 22:47:51,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:51,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:51,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:51,629 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 (28)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:51,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:51,826 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:51,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1959877030, now seen corresponding path program 4 times [2023-08-29 22:47:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871119785] [2023-08-29 22:47:51,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:47:51,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:51,828 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:51,866 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 (29)] Waiting until timeout for monitored process [2023-08-29 22:47:51,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:47:51,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:52,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:52,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:52,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871119785] [2023-08-29 22:47:52,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871119785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:52,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:52,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:52,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102673122] [2023-08-29 22:47:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:52,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:52,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:52,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 22:47:52,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 42 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:52,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 22:47:52,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:52,396 INFO L130 PetriNetUnfolder]: 330/655 cut-off events. [2023-08-29 22:47:52,396 INFO L131 PetriNetUnfolder]: For 2658/2658 co-relation queries the response was YES. [2023-08-29 22:47:52,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 655 events. 330/655 cut-off events. For 2658/2658 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3139 event pairs, 203 based on Foata normal form. 18/673 useless extension candidates. Maximal degree in co-relation 2676. Up to 537 conditions per place. [2023-08-29 22:47:52,400 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 1/58 dead transitions. [2023-08-29 22:47:52,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 555 flow [2023-08-29 22:47:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1173 transitions. [2023-08-29 22:47:52,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174377224199288 [2023-08-29 22:47:52,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1173 transitions. [2023-08-29 22:47:52,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1173 transitions. [2023-08-29 22:47:52,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:52,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1173 transitions. [2023-08-29 22:47:52,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,407 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,407 INFO L175 Difference]: Start difference. First operand has 75 places, 42 transitions, 371 flow. Second operand 5 states and 1173 transitions. [2023-08-29 22:47:52,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 555 flow [2023-08-29 22:47:52,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 521 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 22:47:52,413 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 362 flow [2023-08-29 22:47:52,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2023-08-29 22:47:52,414 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-29 22:47:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 362 flow [2023-08-29 22:47:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:52,427 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 (29)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:52,625 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:52,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1132015867, now seen corresponding path program 4 times [2023-08-29 22:47:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488358528] [2023-08-29 22:47:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:47:52,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:52,627 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:52,629 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 (30)] Waiting until timeout for monitored process [2023-08-29 22:47:52,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 22:47:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:47:52,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:47:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:52,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:47:52,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:47:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488358528] [2023-08-29 22:47:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488358528] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:47:52,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:47:52,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:47:52,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030244615] [2023-08-29 22:47:52,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:47:52,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:47:52,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:47:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:47:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:47:52,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-29 22:47:52,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:52,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:47:52,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-29 22:47:52,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:47:53,195 INFO L130 PetriNetUnfolder]: 311/604 cut-off events. [2023-08-29 22:47:53,196 INFO L131 PetriNetUnfolder]: For 1987/1987 co-relation queries the response was YES. [2023-08-29 22:47:53,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 604 events. 311/604 cut-off events. For 1987/1987 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2740 event pairs, 187 based on Foata normal form. 4/608 useless extension candidates. Maximal degree in co-relation 2476. Up to 489 conditions per place. [2023-08-29 22:47:53,199 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 35 selfloop transitions, 12 changer transitions 4/51 dead transitions. [2023-08-29 22:47:53,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 51 transitions, 485 flow [2023-08-29 22:47:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:47:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:47:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1167 transitions. [2023-08-29 22:47:53,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41530249110320283 [2023-08-29 22:47:53,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1167 transitions. [2023-08-29 22:47:53,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1167 transitions. [2023-08-29 22:47:53,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:47:53,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1167 transitions. [2023-08-29 22:47:53,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.4) internal successors, (1167), 5 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:53,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:53,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:53,204 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 362 flow. Second operand 5 states and 1167 transitions. [2023-08-29 22:47:53,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 51 transitions, 485 flow [2023-08-29 22:47:53,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 439 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-29 22:47:53,208 INFO L231 Difference]: Finished difference. Result has 70 places, 40 transitions, 321 flow [2023-08-29 22:47:53,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=40} [2023-08-29 22:47:53,209 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-08-29 22:47:53,209 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 40 transitions, 321 flow [2023-08-29 22:47:53,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:47:53,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:47:53,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:47:53,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-29 22:47:53,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:53,419 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:47:53,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:47:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1028392938, now seen corresponding path program 1 times [2023-08-29 22:47:53,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:47:53,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856045812] [2023-08-29 22:47:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:47:53,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:47:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:47:53,421 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:47:53,421 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 (31)] Waiting until timeout for monitored process [2023-08-29 22:47:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:47:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:47:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:47:54,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:47:54,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 524 treesize of output 194 [2023-08-29 22:47:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:47:56,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:48:00,097 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-29 22:48:00,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 928 treesize of output 394 [2023-08-29 22:53:27,637 WARN L222 SmtUtils]: Spent 5.37m on a formula simplification. DAG size of input: 412 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:53:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:53:27,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:53:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856045812] [2023-08-29 22:53:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856045812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:53:27,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:53:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:53:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861735325] [2023-08-29 22:53:27,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:53:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:53:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:53:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:53:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:53:33,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-29 22:53:33,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 40 transitions, 321 flow. Second operand has 14 states, 14 states have (on average 203.07142857142858) internal successors, (2843), 14 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:33,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:53:33,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-29 22:53:33,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:53:48,074 INFO L130 PetriNetUnfolder]: 375/733 cut-off events. [2023-08-29 22:53:48,074 INFO L131 PetriNetUnfolder]: For 1902/1902 co-relation queries the response was YES. [2023-08-29 22:53:48,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 733 events. 375/733 cut-off events. For 1902/1902 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3701 event pairs, 50 based on Foata normal form. 5/738 useless extension candidates. Maximal degree in co-relation 2843. Up to 287 conditions per place. [2023-08-29 22:53:48,078 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 67 selfloop transitions, 15 changer transitions 11/93 dead transitions. [2023-08-29 22:53:48,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 812 flow [2023-08-29 22:53:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 22:53:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 22:53:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1667 transitions. [2023-08-29 22:53:48,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707740213523132 [2023-08-29 22:53:48,083 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1667 transitions. [2023-08-29 22:53:48,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1667 transitions. [2023-08-29 22:53:48,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:53:48,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1667 transitions. [2023-08-29 22:53:48,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 208.375) internal successors, (1667), 8 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:48,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:48,087 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:48,087 INFO L175 Difference]: Start difference. First operand has 70 places, 40 transitions, 321 flow. Second operand 8 states and 1667 transitions. [2023-08-29 22:53:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 812 flow [2023-08-29 22:53:48,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 751 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:53:48,090 INFO L231 Difference]: Finished difference. Result has 74 places, 45 transitions, 368 flow [2023-08-29 22:53:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=74, PETRI_TRANSITIONS=45} [2023-08-29 22:53:48,091 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-29 22:53:48,091 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 45 transitions, 368 flow [2023-08-29 22:53:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 203.07142857142858) internal successors, (2843), 14 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:53:48,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:53:48,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:53:48,099 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 (31)] Ended with exit code 0 [2023-08-29 22:53:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:48,292 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:53:48,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:53:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1501316876, now seen corresponding path program 2 times [2023-08-29 22:53:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 22:53:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124387353] [2023-08-29 22:53:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:53:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 22:53:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 22:53:48,294 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 22:53:48,296 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 (32)] Waiting until timeout for monitored process [2023-08-29 22:53:48,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:53:48,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:53:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:53:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:53:48,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:53:48,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 566 treesize of output 214 [2023-08-29 22:53:55,107 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 42 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:53:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:53:58,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:54:03,885 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-29 22:54:03,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 689 treesize of output 339 [2023-08-29 22:58:45,045 WARN L222 SmtUtils]: Spent 4.60m on a formula simplification. DAG size of input: 389 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:58:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:58:45,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 22:58:45,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124387353] [2023-08-29 22:58:45,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124387353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:58:45,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:58:45,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-29 22:58:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782664265] [2023-08-29 22:58:45,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 22:58:45,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 22:58:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 22:58:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 22:58:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:58:48,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-29 22:58:48,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 368 flow. Second operand has 14 states, 14 states have (on average 202.92857142857142) internal successors, (2841), 14 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:48,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:48,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-29 22:58:48,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:01:09,926 WARN L222 SmtUtils]: Spent 2.34m on a formula simplification. DAG size of input: 129 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15