./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/unroll-5.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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 [2023-08-30 01:21:23,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:21:23,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:21:23,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:21:23,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:21:23,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:21:23,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:21:23,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:21:23,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:21:23,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:21:23,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:21:23,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:21:23,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:21:23,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:21:23,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:21:23,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:21:23,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:21:23,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:21:23,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:21:23,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:21:23,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:21:23,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:21:23,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:21:23,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:21:23,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:21:23,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:21:23,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:21:23,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:21:23,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:21:23,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:21:23,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:21:23,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:21:23,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:21:23,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:21:23,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:21:23,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:21:23,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:21:23,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:21:23,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:21:23,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:21:23,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:21:23,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:21:23,145 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:21:23,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:21:23,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:21:23,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:21:23,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:21:23,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:21:23,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:21:23,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:21:23,149 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:21:23,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:21:23,150 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:21:23,150 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:21:23,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:21:23,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:21:23,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:21:23,152 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:21:23,152 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:21:23,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:21:23,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:21:23,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:21:23,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:21:23,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:21:23,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:21:23,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:21:23,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:21:23,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:21:23,154 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:21:23,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:21:23,154 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:21:23,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:21:23,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:21:23,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:21:23,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:21:23,469 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:21:23,470 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:21:23,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 01:21:24,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:21:24,889 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:21:24,890 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 01:21:24,896 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297f99d0f/48634b904f544dfab138fb301bbdb566/FLAG37a2c3aed [2023-08-30 01:21:24,912 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297f99d0f/48634b904f544dfab138fb301bbdb566 [2023-08-30 01:21:24,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:21:24,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:21:24,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:24,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:21:24,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:21:24,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:24" (1/1) ... [2023-08-30 01:21:24,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ade6a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:24, skipping insertion in model container [2023-08-30 01:21:24,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:24" (1/1) ... [2023-08-30 01:21:24,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:21:24,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:25,144 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/unroll-5.wvr.c[2644,2657] [2023-08-30 01:21:25,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:25,168 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) [2023-08-30 01:21:25,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c8f30ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:25, skipping insertion in model container [2023-08-30 01:21:25,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:25,171 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 01:21:25,173 INFO L158 Benchmark]: Toolchain (without parser) took 255.03ms. Allocated memory is still 69.2MB. Free memory was 46.3MB in the beginning and 36.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:21:25,173 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 34.3MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 01:21:25,174 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.73ms. Allocated memory is still 69.2MB. Free memory was 46.1MB in the beginning and 36.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 01:21:25,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 34.3MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.73ms. Allocated memory is still 69.2MB. Free memory was 46.1MB in the beginning and 36.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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/unroll-5.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 c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e --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 [2023-08-30 01:21:26,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:21:26,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:21:26,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:21:26,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:21:26,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:21:26,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:21:26,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:21:26,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:21:26,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:21:26,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:21:26,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:21:26,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:21:26,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:21:26,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:21:26,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:21:26,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:21:26,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:21:26,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:21:26,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:21:26,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:21:26,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:21:26,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:21:26,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:21:26,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:21:26,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:21:26,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:21:26,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:21:26,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:21:26,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:21:26,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:21:26,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:21:26,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:21:27,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:21:27,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:21:27,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:21:27,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:21:27,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:21:27,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:21:27,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:21:27,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:21:27,005 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 01:21:27,041 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:21:27,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:21:27,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:21:27,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:21:27,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:21:27,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:21:27,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:21:27,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:21:27,045 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:21:27,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:21:27,046 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:21:27,046 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:21:27,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:21:27,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:21:27,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:21:27,047 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:21:27,047 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:21:27,047 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:21:27,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:21:27,048 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:21:27,048 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 01:21:27,048 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 01:21:27,048 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:21:27,048 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:21:27,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:21:27,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:21:27,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:21:27,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:21:27,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:21:27,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:21:27,050 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 01:21:27,050 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 01:21:27,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:21:27,050 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:21:27,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:21:27,051 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 01:21:27,051 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:21:27,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ce32899aa465c1eaa89b234122d94aaf792bb347295ccb743670e04bba6b8e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:21:27,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:21:27,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:21:27,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:21:27,341 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:21:27,341 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:21:27,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 01:21:28,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:21:28,674 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:21:28,674 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-5.wvr.c [2023-08-30 01:21:28,679 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f63ffe7aa/308fe4711dbe4709b4494a261c8d1c3d/FLAGea340b10b [2023-08-30 01:21:28,691 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f63ffe7aa/308fe4711dbe4709b4494a261c8d1c3d [2023-08-30 01:21:28,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:21:28,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:21:28,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:28,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:21:28,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:21:28,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:28,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774277f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28, skipping insertion in model container [2023-08-30 01:21:28,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:28,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:21:28,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:28,856 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/unroll-5.wvr.c[2644,2657] [2023-08-30 01:21:28,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:28,874 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 01:21:28,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:21:28,892 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/unroll-5.wvr.c[2644,2657] [2023-08-30 01:21:28,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:28,899 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:21:28,918 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/unroll-5.wvr.c[2644,2657] [2023-08-30 01:21:28,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:21:28,934 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:21:28,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28 WrapperNode [2023-08-30 01:21:28,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:21:28,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:21:28,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:21:28,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:21:28,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:28,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:28,994 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 165 [2023-08-30 01:21:28,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:21:28,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:21:28,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:21:28,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:21:29,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:21:29,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:21:29,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:21:29,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:21:29,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (1/1) ... [2023-08-30 01:21:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:21:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:21:29,093 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) [2023-08-30 01:21:29,136 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 [2023-08-30 01:21:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:21:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 01:21:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:21:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 01:21:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 01:21:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 01:21:29,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 01:21:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 01:21:29,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 01:21:29,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:21:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:21:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:21:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 01:21:29,143 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:21:29,299 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:21:29,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:21:29,724 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:21:29,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:21:29,732 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 01:21:29,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:21:29 BoogieIcfgContainer [2023-08-30 01:21:29,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:21:29,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:21:29,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:21:29,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:21:29,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:21:28" (1/3) ... [2023-08-30 01:21:29,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5daad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:21:29, skipping insertion in model container [2023-08-30 01:21:29,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:21:28" (2/3) ... [2023-08-30 01:21:29,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5daad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:21:29, skipping insertion in model container [2023-08-30 01:21:29,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:21:29" (3/3) ... [2023-08-30 01:21:29,742 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2023-08-30 01:21:29,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:21:29,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-08-30 01:21:29,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:21:29,860 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:21:29,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2023-08-30 01:21:30,009 INFO L130 PetriNetUnfolder]: 17/218 cut-off events. [2023-08-30 01:21:30,009 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:21:30,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 275 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-30 01:21:30,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2023-08-30 01:21:30,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 214 transitions, 440 flow [2023-08-30 01:21:30,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:21:30,049 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 214 transitions, 440 flow [2023-08-30 01:21:30,055 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 214 transitions, 440 flow [2023-08-30 01:21:30,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 214 transitions, 440 flow [2023-08-30 01:21:30,123 INFO L130 PetriNetUnfolder]: 17/214 cut-off events. [2023-08-30 01:21:30,123 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:21:30,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 214 events. 17/214 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2023-08-30 01:21:30,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 5568 [2023-08-30 01:21:57,117 INFO L134 LiptonReduction]: Checked pairs total: 5474 [2023-08-30 01:21:57,117 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-30 01:21:57,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:21:57,136 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;@7fe5a92b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:21:57,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-30 01:21:57,139 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 01:21:57,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:21:57,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:57,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:21:57,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:21:57,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 28433, now seen corresponding path program 1 times [2023-08-30 01:21:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:57,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628278160] [2023-08-30 01:21:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:57,157 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 [2023-08-30 01:21:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:57,165 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) [2023-08-30 01:21:57,219 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 [2023-08-30 01:21:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:21:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:57,396 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:21:57,397 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 [2023-08-30 01:21:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:21:57,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:57,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628278160] [2023-08-30 01:21:57,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628278160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:57,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:57,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146425265] [2023-08-30 01:21:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:57,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 01:21:57,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:57,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:57,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 01:21:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:58,150 INFO L130 PetriNetUnfolder]: 597/840 cut-off events. [2023-08-30 01:21:58,150 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 01:21:58,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 840 events. 597/840 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3621 event pairs, 286 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 1466. Up to 834 conditions per place. [2023-08-30 01:21:58,157 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 01:21:58,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 144 flow [2023-08-30 01:21:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-30 01:21:58,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390415785764623 [2023-08-30 01:21:58,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-30 01:21:58,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-30 01:21:58,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:58,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-30 01:21:58,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:58,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:58,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:58,190 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 623 transitions. [2023-08-30 01:21:58,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 144 flow [2023-08-30 01:21:58,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:21:58,200 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 74 flow [2023-08-30 01:21:58,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-30 01:21:58,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-30 01:21:58,206 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 74 flow [2023-08-30 01:21:58,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:58,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:58,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:21:58,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 01:21:58,416 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 [2023-08-30 01:21:58,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:21:58,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:58,417 INFO L85 PathProgramCache]: Analyzing trace with hash 28551, now seen corresponding path program 1 times [2023-08-30 01:21:58,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:58,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337224687] [2023-08-30 01:21:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:58,418 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 [2023-08-30 01:21:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:58,424 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) [2023-08-30 01:21:58,426 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 [2023-08-30 01:21:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:21:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:21:58,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:58,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337224687] [2023-08-30 01:21:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337224687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243251211] [2023-08-30 01:21:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:58,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 473 [2023-08-30 01:21:58,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:58,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:58,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 473 [2023-08-30 01:21:58,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:21:58,986 INFO L130 PetriNetUnfolder]: 597/842 cut-off events. [2023-08-30 01:21:58,986 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:21:58,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 842 events. 597/842 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3618 event pairs, 286 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 1682. Up to 835 conditions per place. [2023-08-30 01:21:58,991 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 01:21:58,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 146 flow [2023-08-30 01:21:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:21:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:21:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-30 01:21:58,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44256518675123324 [2023-08-30 01:21:58,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-30 01:21:58,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-30 01:21:58,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:21:58,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-30 01:21:58,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:59,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:59,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:59,010 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 74 flow. Second operand 3 states and 628 transitions. [2023-08-30 01:21:59,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 146 flow [2023-08-30 01:21:59,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:21:59,013 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 89 flow [2023-08-30 01:21:59,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-30 01:21:59,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-08-30 01:21:59,014 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 89 flow [2023-08-30 01:21:59,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:59,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:21:59,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 01:21:59,029 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 [2023-08-30 01:21:59,223 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 [2023-08-30 01:21:59,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:21:59,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:21:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 28434, now seen corresponding path program 1 times [2023-08-30 01:21:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:21:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549852769] [2023-08-30 01:21:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:21:59,225 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 [2023-08-30 01:21:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:21:59,226 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) [2023-08-30 01:21:59,229 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 [2023-08-30 01:21:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:21:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:21:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:21:59,399 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:21:59,399 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 14 treesize of output 29 [2023-08-30 01:21:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:21:59,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:21:59,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:21:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549852769] [2023-08-30 01:21:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549852769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:21:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:21:59,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:21:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110682392] [2023-08-30 01:21:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:21:59,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:21:59,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:21:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:21:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:21:59,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-08-30 01:21:59,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:21:59,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:21:59,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-08-30 01:21:59,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:00,130 INFO L130 PetriNetUnfolder]: 597/841 cut-off events. [2023-08-30 01:22:00,131 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 01:22:00,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 841 events. 597/841 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 3611 event pairs, 286 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 1686. Up to 835 conditions per place. [2023-08-30 01:22:00,136 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 01:22:00,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 155 flow [2023-08-30 01:22:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:22:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:22:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-30 01:22:00,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383368569415081 [2023-08-30 01:22:00,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-30 01:22:00,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-30 01:22:00,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:00,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-30 01:22:00,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:00,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:00,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:00,145 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 89 flow. Second operand 3 states and 622 transitions. [2023-08-30 01:22:00,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 155 flow [2023-08-30 01:22:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:00,147 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 93 flow [2023-08-30 01:22:00,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-30 01:22:00,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-30 01:22:00,149 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 93 flow [2023-08-30 01:22:00,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:00,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:00,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:22:00,164 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 [2023-08-30 01:22:00,361 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 [2023-08-30 01:22:00,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:00,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash 885243, now seen corresponding path program 1 times [2023-08-30 01:22:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:00,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784637552] [2023-08-30 01:22:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:00,363 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 [2023-08-30 01:22:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:00,366 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) [2023-08-30 01:22:00,367 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 [2023-08-30 01:22:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:22:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:00,477 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:00,477 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 14 treesize of output 29 [2023-08-30 01:22:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:00,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:00,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:00,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784637552] [2023-08-30 01:22:00,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784637552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:00,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:00,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 01:22:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788348524] [2023-08-30 01:22:00,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:22:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:22:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:22:01,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-08-30 01:22:01,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:01,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:01,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-08-30 01:22:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:02,472 INFO L130 PetriNetUnfolder]: 1199/1687 cut-off events. [2023-08-30 01:22:02,472 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:22:02,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1687 events. 1199/1687 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 8220 event pairs, 572 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 3391. Up to 838 conditions per place. [2023-08-30 01:22:02,481 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 60 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-08-30 01:22:02,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 339 flow [2023-08-30 01:22:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:22:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:22:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1214 transitions. [2023-08-30 01:22:02,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277660324171952 [2023-08-30 01:22:02,487 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1214 transitions. [2023-08-30 01:22:02,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1214 transitions. [2023-08-30 01:22:02,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:02,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1214 transitions. [2023-08-30 01:22:02,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.33333333333334) internal successors, (1214), 6 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:02,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:02,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:02,498 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 93 flow. Second operand 6 states and 1214 transitions. [2023-08-30 01:22:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 339 flow [2023-08-30 01:22:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 73 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:22:02,500 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 187 flow [2023-08-30 01:22:02,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 01:22:02,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 01:22:02,501 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 187 flow [2023-08-30 01:22:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:02,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:02,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:22:02,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 01:22:02,710 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 [2023-08-30 01:22:02,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:02,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 885360, now seen corresponding path program 1 times [2023-08-30 01:22:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:02,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836091256] [2023-08-30 01:22:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:02,712 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 [2023-08-30 01:22:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:02,713 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) [2023-08-30 01:22:02,715 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 [2023-08-30 01:22:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:22:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:02,808 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 01:22:02,809 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 33 [2023-08-30 01:22:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:02,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:02,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836091256] [2023-08-30 01:22:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836091256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:02,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:02,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:22:02,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364410208] [2023-08-30 01:22:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:02,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:22:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:22:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:22:02,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 01:22:02,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:02,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:02,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 01:22:02,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:03,356 INFO L130 PetriNetUnfolder]: 903/1299 cut-off events. [2023-08-30 01:22:03,357 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 01:22:03,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 1299 events. 903/1299 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 6297 event pairs, 430 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 2637. Up to 1287 conditions per place. [2023-08-30 01:22:03,363 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-30 01:22:03,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 237 flow [2023-08-30 01:22:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:22:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:22:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-30 01:22:03,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284707540521494 [2023-08-30 01:22:03,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-30 01:22:03,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-30 01:22:03,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:03,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-30 01:22:03,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:03,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:03,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:03,372 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 187 flow. Second operand 3 states and 608 transitions. [2023-08-30 01:22:03,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 237 flow [2023-08-30 01:22:03,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 221 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:03,377 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 147 flow [2023-08-30 01:22:03,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-30 01:22:03,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-30 01:22:03,380 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 147 flow [2023-08-30 01:22:03,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:03,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:03,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:22:03,396 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 [2023-08-30 01:22:03,596 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 [2023-08-30 01:22:03,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:03,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 885361, now seen corresponding path program 1 times [2023-08-30 01:22:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:03,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080478290] [2023-08-30 01:22:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:03,597 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 [2023-08-30 01:22:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:03,599 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) [2023-08-30 01:22:03,601 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 [2023-08-30 01:22:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:22:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:22:03,764 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-08-30 01:22:03,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2023-08-30 01:22:03,775 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 [2023-08-30 01:22:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:03,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:03,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:03,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080478290] [2023-08-30 01:22:03,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080478290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:03,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:03,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:22:03,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803564933] [2023-08-30 01:22:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:03,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:22:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:22:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:22:04,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 01:22:04,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:04,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 01:22:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:04,384 INFO L130 PetriNetUnfolder]: 607/911 cut-off events. [2023-08-30 01:22:04,385 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:22:04,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1859 conditions, 911 events. 607/911 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 4345 event pairs, 288 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1844. Up to 899 conditions per place. [2023-08-30 01:22:04,389 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 01:22:04,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 193 flow [2023-08-30 01:22:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:22:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:22:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-30 01:22:04,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2023-08-30 01:22:04,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-30 01:22:04,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-30 01:22:04,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:04,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-30 01:22:04,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,398 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 147 flow. Second operand 3 states and 615 transitions. [2023-08-30 01:22:04,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 193 flow [2023-08-30 01:22:04,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:04,399 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 126 flow [2023-08-30 01:22:04,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-30 01:22:04,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 01:22:04,400 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 126 flow [2023-08-30 01:22:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:04,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:22:04,410 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 [2023-08-30 01:22:04,607 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 [2023-08-30 01:22:04,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:04,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 850849787, now seen corresponding path program 1 times [2023-08-30 01:22:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496549357] [2023-08-30 01:22:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:04,609 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 [2023-08-30 01:22:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:04,610 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) [2023-08-30 01:22:04,621 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 [2023-08-30 01:22:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:22:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:04,715 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 01:22:04,717 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 [2023-08-30 01:22:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:04,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:04,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496549357] [2023-08-30 01:22:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496549357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:04,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:04,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:22:04,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591039374] [2023-08-30 01:22:04,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:04,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:22:04,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:22:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:22:04,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 01:22:04,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:04,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:04,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 01:22:04,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:05,182 INFO L130 PetriNetUnfolder]: 561/837 cut-off events. [2023-08-30 01:22:05,183 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:22:05,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 837 events. 561/837 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 3902 event pairs, 266 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 1696. Up to 825 conditions per place. [2023-08-30 01:22:05,187 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 01:22:05,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 186 flow [2023-08-30 01:22:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:22:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:22:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-30 01:22:05,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42565186751233264 [2023-08-30 01:22:05,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-30 01:22:05,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-30 01:22:05,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:05,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-30 01:22:05,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:05,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:05,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:05,194 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 126 flow. Second operand 3 states and 604 transitions. [2023-08-30 01:22:05,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 186 flow [2023-08-30 01:22:05,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:05,197 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 123 flow [2023-08-30 01:22:05,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-30 01:22:05,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-30 01:22:05,198 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 123 flow [2023-08-30 01:22:05,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:05,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:05,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:22:05,212 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 [2023-08-30 01:22:05,407 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 [2023-08-30 01:22:05,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:05,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 850849788, now seen corresponding path program 1 times [2023-08-30 01:22:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057275041] [2023-08-30 01:22:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:05,409 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 [2023-08-30 01:22:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:05,411 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) [2023-08-30 01:22:05,412 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 [2023-08-30 01:22:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:22:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:05,539 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:05,540 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 14 treesize of output 29 [2023-08-30 01:22:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:05,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:05,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057275041] [2023-08-30 01:22:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057275041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:05,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:22:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793855313] [2023-08-30 01:22:05,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:22:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:22:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:22:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-08-30 01:22:06,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 123 flow. Second operand has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:06,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:06,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-08-30 01:22:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:07,324 INFO L130 PetriNetUnfolder]: 515/763 cut-off events. [2023-08-30 01:22:07,325 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 01:22:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 763 events. 515/763 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3442 event pairs, 244 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1548. Up to 378 conditions per place. [2023-08-30 01:22:07,329 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 48 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-30 01:22:07,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 273 flow [2023-08-30 01:22:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 01:22:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 01:22:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 981 transitions. [2023-08-30 01:22:07,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147991543340381 [2023-08-30 01:22:07,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 981 transitions. [2023-08-30 01:22:07,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 981 transitions. [2023-08-30 01:22:07,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:07,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 981 transitions. [2023-08-30 01:22:07,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:07,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 473.0) internal successors, (2838), 6 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:07,340 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 123 flow. Second operand 5 states and 981 transitions. [2023-08-30 01:22:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 273 flow [2023-08-30 01:22:07,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:22:07,342 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 124 flow [2023-08-30 01:22:07,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-30 01:22:07,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-30 01:22:07,343 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 124 flow [2023-08-30 01:22:07,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.25) internal successors, (1498), 8 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:07,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:07,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:22:07,361 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 [2023-08-30 01:22:07,554 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 [2023-08-30 01:22:07,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:07,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash 606531938, now seen corresponding path program 1 times [2023-08-30 01:22:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:07,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20511993] [2023-08-30 01:22:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:07,555 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 [2023-08-30 01:22:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:07,560 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) [2023-08-30 01:22:07,563 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 [2023-08-30 01:22:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:22:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:07,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:07,841 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 35 treesize of output 31 [2023-08-30 01:22:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:07,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20511993] [2023-08-30 01:22:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20511993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:07,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:22:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540242485] [2023-08-30 01:22:07,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:22:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:22:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:22:09,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 01:22:09,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 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) [2023-08-30 01:22:09,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:09,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 01:22:09,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:10,249 INFO L130 PetriNetUnfolder]: 681/1051 cut-off events. [2023-08-30 01:22:10,249 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 01:22:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 1051 events. 681/1051 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5388 event pairs, 213 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 2134. Up to 647 conditions per place. [2023-08-30 01:22:10,253 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 59 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-08-30 01:22:10,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 349 flow [2023-08-30 01:22:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:22:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:22:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1375 transitions. [2023-08-30 01:22:10,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2023-08-30 01:22:10,258 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1375 transitions. [2023-08-30 01:22:10,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1375 transitions. [2023-08-30 01:22:10,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:10,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1375 transitions. [2023-08-30 01:22:10,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.42857142857142) internal successors, (1375), 7 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:10,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:10,267 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:10,267 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 124 flow. Second operand 7 states and 1375 transitions. [2023-08-30 01:22:10,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 349 flow [2023-08-30 01:22:10,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 01:22:10,270 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 161 flow [2023-08-30 01:22:10,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-30 01:22:10,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-30 01:22:10,271 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 161 flow [2023-08-30 01:22:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 188.25) internal successors, (1506), 8 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) [2023-08-30 01:22:10,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:10,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:22:10,282 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 [2023-08-30 01:22:10,481 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 [2023-08-30 01:22:10,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:10,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash 606531937, now seen corresponding path program 1 times [2023-08-30 01:22:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:10,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776085206] [2023-08-30 01:22:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:10,483 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 [2023-08-30 01:22:10,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:10,484 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) [2023-08-30 01:22:10,486 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 [2023-08-30 01:22:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:22:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:10,568 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 01:22:10,568 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 [2023-08-30 01:22:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:10,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:10,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:10,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776085206] [2023-08-30 01:22:10,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776085206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:10,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:10,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:22:10,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275555459] [2023-08-30 01:22:10,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:10,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:10,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:10,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:10,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 473 [2023-08-30 01:22:10,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:10,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:10,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 473 [2023-08-30 01:22:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:11,000 INFO L130 PetriNetUnfolder]: 431/693 cut-off events. [2023-08-30 01:22:11,000 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-30 01:22:11,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 693 events. 431/693 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 3469 event pairs, 246 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 1587. Up to 676 conditions per place. [2023-08-30 01:22:11,004 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 26 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 01:22:11,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 33 transitions, 219 flow [2023-08-30 01:22:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-30 01:22:11,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2023-08-30 01:22:11,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-30 01:22:11,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-30 01:22:11,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:11,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-30 01:22:11,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:11,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:11,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:11,012 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 161 flow. Second operand 4 states and 748 transitions. [2023-08-30 01:22:11,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 33 transitions, 219 flow [2023-08-30 01:22:11,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 33 transitions, 205 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 01:22:11,014 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 153 flow [2023-08-30 01:22:11,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=4, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-30 01:22:11,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-30 01:22:11,015 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 153 flow [2023-08-30 01:22:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:11,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:11,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 01:22:11,031 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 [2023-08-30 01:22:11,224 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 [2023-08-30 01:22:11,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:11,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash 606232914, now seen corresponding path program 2 times [2023-08-30 01:22:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:11,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964941875] [2023-08-30 01:22:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:22:11,225 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 [2023-08-30 01:22:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:11,226 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) [2023-08-30 01:22:11,227 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 [2023-08-30 01:22:11,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:22:11,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 01:22:11,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:11,355 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:11,355 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 14 treesize of output 29 [2023-08-30 01:22:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:11,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:12,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:12,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964941875] [2023-08-30 01:22:12,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964941875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:12,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:12,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 01:22:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160007033] [2023-08-30 01:22:12,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:12,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:22:12,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:22:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:22:15,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-08-30 01:22:15,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 153 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:15,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:15,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-08-30 01:22:15,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:19,326 INFO L130 PetriNetUnfolder]: 1928/3092 cut-off events. [2023-08-30 01:22:19,326 INFO L131 PetriNetUnfolder]: For 859/859 co-relation queries the response was YES. [2023-08-30 01:22:19,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 3092 events. 1928/3092 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18848 event pairs, 1107 based on Foata normal form. 6/1801 useless extension candidates. Maximal degree in co-relation 7015. Up to 339 conditions per place. [2023-08-30 01:22:19,351 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 182 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-08-30 01:22:19,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 196 transitions, 1034 flow [2023-08-30 01:22:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 01:22:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 01:22:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2483 transitions. [2023-08-30 01:22:19,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43745595489781536 [2023-08-30 01:22:19,359 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2483 transitions. [2023-08-30 01:22:19,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2483 transitions. [2023-08-30 01:22:19,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:19,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2483 transitions. [2023-08-30 01:22:19,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.91666666666666) internal successors, (2483), 12 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,386 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,386 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 153 flow. Second operand 12 states and 2483 transitions. [2023-08-30 01:22:19,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 196 transitions, 1034 flow [2023-08-30 01:22:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 196 transitions, 1022 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:22:19,391 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 237 flow [2023-08-30 01:22:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-08-30 01:22:19,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-08-30 01:22:19,393 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 237 flow [2023-08-30 01:22:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:19,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:19,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:19,407 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 [2023-08-30 01:22:19,604 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 [2023-08-30 01:22:19,604 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:19,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1622621674, now seen corresponding path program 1 times [2023-08-30 01:22:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771649743] [2023-08-30 01:22:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:22:19,605 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 [2023-08-30 01:22:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:19,606 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) [2023-08-30 01:22:19,608 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 [2023-08-30 01:22:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:22:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:22:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:19,751 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:19,752 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 14 treesize of output 29 [2023-08-30 01:22:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:22:20,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771649743] [2023-08-30 01:22:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771649743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:20,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:22:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606156950] [2023-08-30 01:22:20,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:22:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:20,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:22:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:22:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-08-30 01:22:28,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:28,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:28,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-08-30 01:22:28,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:31,705 INFO L130 PetriNetUnfolder]: 1457/2387 cut-off events. [2023-08-30 01:22:31,705 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2023-08-30 01:22:31,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 2387 events. 1457/2387 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14162 event pairs, 828 based on Foata normal form. 21/1484 useless extension candidates. Maximal degree in co-relation 5441. Up to 2023 conditions per place. [2023-08-30 01:22:31,716 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 52 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-30 01:22:31,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 428 flow [2023-08-30 01:22:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:22:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:22:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1739 transitions. [2023-08-30 01:22:31,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085036410617806 [2023-08-30 01:22:31,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1739 transitions. [2023-08-30 01:22:31,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1739 transitions. [2023-08-30 01:22:31,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:31,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1739 transitions. [2023-08-30 01:22:31,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.22222222222223) internal successors, (1739), 9 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:31,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:31,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:31,733 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 237 flow. Second operand 9 states and 1739 transitions. [2023-08-30 01:22:31,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 428 flow [2023-08-30 01:22:31,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 415 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 01:22:31,736 INFO L231 Difference]: Finished difference. Result has 71 places, 40 transitions, 273 flow [2023-08-30 01:22:31,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=273, PETRI_PLACES=71, PETRI_TRANSITIONS=40} [2023-08-30 01:22:31,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-08-30 01:22:31,737 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 40 transitions, 273 flow [2023-08-30 01:22:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:31,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:31,738 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 01:22:31,751 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 [2023-08-30 01:22:31,950 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 [2023-08-30 01:22:31,951 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:31,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1508992575, now seen corresponding path program 2 times [2023-08-30 01:22:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:31,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149056154] [2023-08-30 01:22:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:22:31,952 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 [2023-08-30 01:22:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:31,953 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) [2023-08-30 01:22:31,953 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 [2023-08-30 01:22:32,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:22:32,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 01:22:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:32,085 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:32,086 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 14 treesize of output 29 [2023-08-30 01:22:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 01:22:32,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:22:32,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149056154] [2023-08-30 01:22:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149056154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:22:32,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:22:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:22:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012391382] [2023-08-30 01:22:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:22:32,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:22:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:22:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:22:32,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 473 [2023-08-30 01:22:32,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 40 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:32,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 473 [2023-08-30 01:22:32,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:22:32,773 INFO L130 PetriNetUnfolder]: 515/977 cut-off events. [2023-08-30 01:22:32,773 INFO L131 PetriNetUnfolder]: For 962/962 co-relation queries the response was YES. [2023-08-30 01:22:32,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2265 conditions, 977 events. 515/977 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5395 event pairs, 270 based on Foata normal form. 162/959 useless extension candidates. Maximal degree in co-relation 2234. Up to 919 conditions per place. [2023-08-30 01:22:32,788 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 01:22:32,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 34 transitions, 297 flow [2023-08-30 01:22:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:22:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:22:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 790 transitions. [2023-08-30 01:22:32,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175475687103594 [2023-08-30 01:22:32,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 790 transitions. [2023-08-30 01:22:32,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 790 transitions. [2023-08-30 01:22:32,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:22:32,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 790 transitions. [2023-08-30 01:22:32,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.5) internal successors, (790), 4 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,795 INFO L175 Difference]: Start difference. First operand has 71 places, 40 transitions, 273 flow. Second operand 4 states and 790 transitions. [2023-08-30 01:22:32,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 34 transitions, 297 flow [2023-08-30 01:22:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 34 transitions, 240 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-30 01:22:32,798 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 188 flow [2023-08-30 01:22:32,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-30 01:22:32,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-30 01:22:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 188 flow [2023-08-30 01:22:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:22:32,800 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 01:22:32,814 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 [2023-08-30 01:22:33,009 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 [2023-08-30 01:22:33,009 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:22:33,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:22:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1241804978, now seen corresponding path program 3 times [2023-08-30 01:22:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:22:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161902256] [2023-08-30 01:22:33,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:22:33,010 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 [2023-08-30 01:22:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:22:33,011 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) [2023-08-30 01:22:33,013 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 [2023-08-30 01:22:33,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 01:22:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:22:33,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:22:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:22:33,223 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 01:22:33,224 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 14 treesize of output 29 [2023-08-30 01:22:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:33,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:22:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:22:35,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:22:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161902256] [2023-08-30 01:22:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161902256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:22:35,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:22:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 01:22:35,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79780639] [2023-08-30 01:22:35,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:22:35,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:22:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:22:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:22:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:22:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 473 [2023-08-30 01:22:51,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 188 flow. Second operand has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:22:51,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:22:51,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 473 [2023-08-30 01:22:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:06,940 INFO L130 PetriNetUnfolder]: 1199/2273 cut-off events. [2023-08-30 01:23:06,940 INFO L131 PetriNetUnfolder]: For 747/747 co-relation queries the response was YES. [2023-08-30 01:23:06,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 2273 events. 1199/2273 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 13399 event pairs, 630 based on Foata normal form. 12/1865 useless extension candidates. Maximal degree in co-relation 4999. Up to 504 conditions per place. [2023-08-30 01:23:06,958 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 296 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2023-08-30 01:23:06,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 322 transitions, 1780 flow [2023-08-30 01:23:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 01:23:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 01:23:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4895 transitions. [2023-08-30 01:23:06,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312015503875969 [2023-08-30 01:23:06,970 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4895 transitions. [2023-08-30 01:23:06,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4895 transitions. [2023-08-30 01:23:06,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:06,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4895 transitions. [2023-08-30 01:23:06,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 203.95833333333334) internal successors, (4895), 24 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:06,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:06,993 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:06,993 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 188 flow. Second operand 24 states and 4895 transitions. [2023-08-30 01:23:06,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 322 transitions, 1780 flow [2023-08-30 01:23:06,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 322 transitions, 1756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:23:06,999 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 346 flow [2023-08-30 01:23:07,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=346, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2023-08-30 01:23:07,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-30 01:23:07,000 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 346 flow [2023-08-30 01:23:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 192.0) internal successors, (4608), 24 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:07,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:07,012 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 [2023-08-30 01:23:07,212 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 [2023-08-30 01:23:07,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:07,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:07,213 INFO L85 PathProgramCache]: Analyzing trace with hash -902556325, now seen corresponding path program 1 times [2023-08-30 01:23:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:07,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569921931] [2023-08-30 01:23:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:23:07,214 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 [2023-08-30 01:23:07,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:07,215 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) [2023-08-30 01:23:07,218 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 [2023-08-30 01:23:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:23:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 01:23:07,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:07,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:23:07,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:07,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569921931] [2023-08-30 01:23:07,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569921931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:23:07,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:23:07,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:23:07,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193538560] [2023-08-30 01:23:07,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:07,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:23:07,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:23:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:23:07,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 473 [2023-08-30 01:23:07,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:07,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 473 [2023-08-30 01:23:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:07,850 INFO L130 PetriNetUnfolder]: 1493/2756 cut-off events. [2023-08-30 01:23:07,850 INFO L131 PetriNetUnfolder]: For 608/608 co-relation queries the response was YES. [2023-08-30 01:23:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2756 events. 1493/2756 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 16670 event pairs, 273 based on Foata normal form. 21/2273 useless extension candidates. Maximal degree in co-relation 6152. Up to 2101 conditions per place. [2023-08-30 01:23:07,904 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 51 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2023-08-30 01:23:07,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 487 flow [2023-08-30 01:23:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:23:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:23:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-30 01:23:07,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2023-08-30 01:23:07,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-30 01:23:07,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-30 01:23:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:07,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-30 01:23:07,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,910 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 346 flow. Second operand 3 states and 612 transitions. [2023-08-30 01:23:07,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 487 flow [2023-08-30 01:23:07,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 58 transitions, 463 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 01:23:07,916 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 352 flow [2023-08-30 01:23:07,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2023-08-30 01:23:07,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2023-08-30 01:23:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 352 flow [2023-08-30 01:23:07,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:07,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:07,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:07,930 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 [2023-08-30 01:23:08,121 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 [2023-08-30 01:23:08,121 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:08,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2011352495, now seen corresponding path program 1 times [2023-08-30 01:23:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:08,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487332274] [2023-08-30 01:23:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:23:08,122 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 [2023-08-30 01:23:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:08,123 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) [2023-08-30 01:23:08,123 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 [2023-08-30 01:23:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:23:08,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:23:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:08,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:23:08,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:08,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487332274] [2023-08-30 01:23:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487332274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:23:08,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:23:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:23:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83256326] [2023-08-30 01:23:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:08,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:23:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:23:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:23:08,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-08-30 01:23:08,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:08,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:08,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-08-30 01:23:08,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:08,885 INFO L130 PetriNetUnfolder]: 1683/3367 cut-off events. [2023-08-30 01:23:08,885 INFO L131 PetriNetUnfolder]: For 1073/1073 co-relation queries the response was YES. [2023-08-30 01:23:08,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 3367 events. 1683/3367 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 21439 event pairs, 520 based on Foata normal form. 240/3607 useless extension candidates. Maximal degree in co-relation 8251. Up to 1662 conditions per place. [2023-08-30 01:23:08,898 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 52 selfloop transitions, 12 changer transitions 8/72 dead transitions. [2023-08-30 01:23:08,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 72 transitions, 553 flow [2023-08-30 01:23:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:23:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:23:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1170 transitions. [2023-08-30 01:23:08,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2023-08-30 01:23:08,902 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1170 transitions. [2023-08-30 01:23:08,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1170 transitions. [2023-08-30 01:23:08,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:08,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1170 transitions. [2023-08-30 01:23:08,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.0) internal successors, (1170), 6 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) [2023-08-30 01:23:08,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:08,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:08,926 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 352 flow. Second operand 6 states and 1170 transitions. [2023-08-30 01:23:08,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 72 transitions, 553 flow [2023-08-30 01:23:08,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:23:08,936 INFO L231 Difference]: Finished difference. Result has 88 places, 51 transitions, 391 flow [2023-08-30 01:23:08,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=88, PETRI_TRANSITIONS=51} [2023-08-30 01:23:08,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2023-08-30 01:23:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 51 transitions, 391 flow [2023-08-30 01:23:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:08,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:08,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:08,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 01:23:09,148 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 [2023-08-30 01:23:09,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:09,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 662331537, now seen corresponding path program 2 times [2023-08-30 01:23:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678999561] [2023-08-30 01:23:09,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:23:09,150 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 [2023-08-30 01:23:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:09,151 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) [2023-08-30 01:23:09,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 01:23:09,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:23:09,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:23:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:09,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:23:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:09,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678999561] [2023-08-30 01:23:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678999561] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:23:09,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:23:09,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-30 01:23:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503783560] [2023-08-30 01:23:09,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:23:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:09,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:23:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 01:23:09,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-30 01:23:09,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 51 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:09,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:09,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-30 01:23:09,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:10,051 INFO L130 PetriNetUnfolder]: 1683/3227 cut-off events. [2023-08-30 01:23:10,051 INFO L131 PetriNetUnfolder]: For 3619/3783 co-relation queries the response was YES. [2023-08-30 01:23:10,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9953 conditions, 3227 events. 1683/3227 cut-off events. For 3619/3783 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19785 event pairs, 480 based on Foata normal form. 83/3290 useless extension candidates. Maximal degree in co-relation 9913. Up to 2080 conditions per place. [2023-08-30 01:23:10,069 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 54 selfloop transitions, 6 changer transitions 4/65 dead transitions. [2023-08-30 01:23:10,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 65 transitions, 575 flow [2023-08-30 01:23:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:23:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:23:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-08-30 01:23:10,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275898520084567 [2023-08-30 01:23:10,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-08-30 01:23:10,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-08-30 01:23:10,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:10,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-08-30 01:23:10,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:10,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:10,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:10,081 INFO L175 Difference]: Start difference. First operand has 88 places, 51 transitions, 391 flow. Second operand 4 states and 809 transitions. [2023-08-30 01:23:10,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 65 transitions, 575 flow [2023-08-30 01:23:10,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 65 transitions, 541 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 01:23:10,089 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 409 flow [2023-08-30 01:23:10,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=409, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-08-30 01:23:10,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2023-08-30 01:23:10,091 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 409 flow [2023-08-30 01:23:10,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:10,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:10,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:10,103 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 [2023-08-30 01:23:10,302 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 [2023-08-30 01:23:10,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:10,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash 570017975, now seen corresponding path program 1 times [2023-08-30 01:23:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557345193] [2023-08-30 01:23:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:23:10,303 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 [2023-08-30 01:23:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:10,304 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) [2023-08-30 01:23:10,306 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 [2023-08-30 01:23:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:23:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:23:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:10,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:23:10,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557345193] [2023-08-30 01:23:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557345193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:23:10,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:23:10,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:23:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705019251] [2023-08-30 01:23:10,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:10,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:23:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:23:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:23:10,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 01:23:10,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:10,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:10,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 01:23:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:11,155 INFO L130 PetriNetUnfolder]: 1883/3727 cut-off events. [2023-08-30 01:23:11,155 INFO L131 PetriNetUnfolder]: For 5153/5153 co-relation queries the response was YES. [2023-08-30 01:23:11,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11892 conditions, 3727 events. 1883/3727 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 23469 event pairs, 520 based on Foata normal form. 40/3767 useless extension candidates. Maximal degree in co-relation 11851. Up to 1782 conditions per place. [2023-08-30 01:23:11,172 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 52 selfloop transitions, 19 changer transitions 10/81 dead transitions. [2023-08-30 01:23:11,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 81 transitions, 679 flow [2023-08-30 01:23:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 01:23:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 01:23:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2023-08-30 01:23:11,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40924192086982786 [2023-08-30 01:23:11,176 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2023-08-30 01:23:11,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2023-08-30 01:23:11,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:11,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2023-08-30 01:23:11,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:11,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:11,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:11,181 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 409 flow. Second operand 7 states and 1355 transitions. [2023-08-30 01:23:11,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 81 transitions, 679 flow [2023-08-30 01:23:11,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 81 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:23:11,194 INFO L231 Difference]: Finished difference. Result has 96 places, 58 transitions, 493 flow [2023-08-30 01:23:11,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=96, PETRI_TRANSITIONS=58} [2023-08-30 01:23:11,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2023-08-30 01:23:11,195 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 58 transitions, 493 flow [2023-08-30 01:23:11,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:11,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:11,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:11,206 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 [2023-08-30 01:23:11,406 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 [2023-08-30 01:23:11,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:11,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 286698499, now seen corresponding path program 3 times [2023-08-30 01:23:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:11,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154440917] [2023-08-30 01:23:11,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:23:11,407 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 [2023-08-30 01:23:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:11,409 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) [2023-08-30 01:23:11,440 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 [2023-08-30 01:23:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:23:11,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:23:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:11,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:23:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:11,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154440917] [2023-08-30 01:23:11,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154440917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:23:11,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:23:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-08-30 01:23:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761855377] [2023-08-30 01:23:11,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:23:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:23:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:23:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:23:11,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 01:23:11,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 58 transitions, 493 flow. Second operand has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:11,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:11,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 01:23:11,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:13,384 INFO L130 PetriNetUnfolder]: 3043/5947 cut-off events. [2023-08-30 01:23:13,384 INFO L131 PetriNetUnfolder]: For 12297/12297 co-relation queries the response was YES. [2023-08-30 01:23:13,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22376 conditions, 5947 events. 3043/5947 cut-off events. For 12297/12297 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40136 event pairs, 360 based on Foata normal form. 480/6427 useless extension candidates. Maximal degree in co-relation 22333. Up to 2302 conditions per place. [2023-08-30 01:23:13,411 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 79 selfloop transitions, 52 changer transitions 4/135 dead transitions. [2023-08-30 01:23:13,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 135 transitions, 1222 flow [2023-08-30 01:23:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 01:23:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 01:23:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2517 transitions. [2023-08-30 01:23:13,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093348511953163 [2023-08-30 01:23:13,415 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2517 transitions. [2023-08-30 01:23:13,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2517 transitions. [2023-08-30 01:23:13,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:13,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2517 transitions. [2023-08-30 01:23:13,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.6153846153846) internal successors, (2517), 13 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:13,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:13,423 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:13,423 INFO L175 Difference]: Start difference. First operand has 96 places, 58 transitions, 493 flow. Second operand 13 states and 2517 transitions. [2023-08-30 01:23:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 135 transitions, 1222 flow [2023-08-30 01:23:13,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1141 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 01:23:13,455 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 976 flow [2023-08-30 01:23:13,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=976, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2023-08-30 01:23:13,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2023-08-30 01:23:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 976 flow [2023-08-30 01:23:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.6) internal successors, (1896), 10 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:13,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:13,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:13,469 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 [2023-08-30 01:23:13,667 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 [2023-08-30 01:23:13,667 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:13,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1748527785, now seen corresponding path program 2 times [2023-08-30 01:23:13,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:13,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437546305] [2023-08-30 01:23:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:23:13,668 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 [2023-08-30 01:23:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:13,669 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) [2023-08-30 01:23:13,671 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 [2023-08-30 01:23:13,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:23:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:23:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:13,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:23:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:13,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437546305] [2023-08-30 01:23:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437546305] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:23:13,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:23:13,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-30 01:23:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012715750] [2023-08-30 01:23:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:23:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:23:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 01:23:13,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 473 [2023-08-30 01:23:13,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 976 flow. Second operand has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:13,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:13,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 473 [2023-08-30 01:23:13,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:14,887 INFO L130 PetriNetUnfolder]: 2943/5767 cut-off events. [2023-08-30 01:23:14,887 INFO L131 PetriNetUnfolder]: For 20568/20708 co-relation queries the response was YES. [2023-08-30 01:23:14,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 5767 events. 2943/5767 cut-off events. For 20568/20708 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 39111 event pairs, 344 based on Foata normal form. 220/5987 useless extension candidates. Maximal degree in co-relation 27173. Up to 4120 conditions per place. [2023-08-30 01:23:14,916 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 91 selfloop transitions, 14 changer transitions 4/114 dead transitions. [2023-08-30 01:23:14,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 1260 flow [2023-08-30 01:23:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:23:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:23:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 795 transitions. [2023-08-30 01:23:14,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201902748414376 [2023-08-30 01:23:14,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 795 transitions. [2023-08-30 01:23:14,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 795 transitions. [2023-08-30 01:23:14,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:14,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 795 transitions. [2023-08-30 01:23:14,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:14,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:14,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:14,921 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 976 flow. Second operand 4 states and 795 transitions. [2023-08-30 01:23:14,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 1260 flow [2023-08-30 01:23:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1168 flow, removed 43 selfloop flow, removed 1 redundant places. [2023-08-30 01:23:15,026 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 949 flow [2023-08-30 01:23:15,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2023-08-30 01:23:15,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2023-08-30 01:23:15,027 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 949 flow [2023-08-30 01:23:15,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:15,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:15,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:15,037 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 [2023-08-30 01:23:15,233 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 [2023-08-30 01:23:15,234 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:15,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:15,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1394923695, now seen corresponding path program 4 times [2023-08-30 01:23:15,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:15,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297348899] [2023-08-30 01:23:15,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 01:23:15,234 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 [2023-08-30 01:23:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:15,235 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) [2023-08-30 01:23:15,236 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 [2023-08-30 01:23:15,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 01:23:15,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:23:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:23:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:23:15,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:15,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297348899] [2023-08-30 01:23:15,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297348899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:23:15,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:23:15,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 01:23:15,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408898940] [2023-08-30 01:23:15,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:23:15,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 01:23:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 01:23:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-30 01:23:15,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2023-08-30 01:23:15,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 949 flow. Second operand has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:15,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:15,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2023-08-30 01:23:15,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:17,415 INFO L130 PetriNetUnfolder]: 3423/6487 cut-off events. [2023-08-30 01:23:17,415 INFO L131 PetriNetUnfolder]: For 25821/25821 co-relation queries the response was YES. [2023-08-30 01:23:17,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29244 conditions, 6487 events. 3423/6487 cut-off events. For 25821/25821 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 43292 event pairs, 520 based on Foata normal form. 440/6847 useless extension candidates. Maximal degree in co-relation 29193. Up to 2702 conditions per place. [2023-08-30 01:23:17,448 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 78 selfloop transitions, 59 changer transitions 4/141 dead transitions. [2023-08-30 01:23:17,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 141 transitions, 1465 flow [2023-08-30 01:23:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:23:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:23:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1931 transitions. [2023-08-30 01:23:17,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824524312896404 [2023-08-30 01:23:17,452 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1931 transitions. [2023-08-30 01:23:17,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1931 transitions. [2023-08-30 01:23:17,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:17,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1931 transitions. [2023-08-30 01:23:17,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.1) internal successors, (1931), 10 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:17,457 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:17,457 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 949 flow. Second operand 10 states and 1931 transitions. [2023-08-30 01:23:17,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 141 transitions, 1465 flow [2023-08-30 01:23:17,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 141 transitions, 1446 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 01:23:17,548 INFO L231 Difference]: Finished difference. Result has 125 places, 114 transitions, 1231 flow [2023-08-30 01:23:17,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2023-08-30 01:23:17,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2023-08-30 01:23:17,548 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 1231 flow [2023-08-30 01:23:17,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:17,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:17,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:17,559 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 [2023-08-30 01:23:17,759 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 [2023-08-30 01:23:17,759 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:17,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -516239137, now seen corresponding path program 3 times [2023-08-30 01:23:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113777818] [2023-08-30 01:23:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 01:23:17,760 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 [2023-08-30 01:23:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:17,761 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) [2023-08-30 01:23:17,762 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 [2023-08-30 01:23:17,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 01:23:17,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:17,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 01:23:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:23:17,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:23:17,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113777818] [2023-08-30 01:23:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113777818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:23:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:23:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:23:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117880947] [2023-08-30 01:23:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:23:17,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 01:23:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 01:23:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:23:17,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 473 [2023-08-30 01:23:17,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 1231 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:17,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:17,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 473 [2023-08-30 01:23:17,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:18,948 INFO L130 PetriNetUnfolder]: 3103/5627 cut-off events. [2023-08-30 01:23:18,948 INFO L131 PetriNetUnfolder]: For 27771/27771 co-relation queries the response was YES. [2023-08-30 01:23:18,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 5627 events. 3103/5627 cut-off events. For 27771/27771 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 34159 event pairs, 960 based on Foata normal form. 80/5627 useless extension candidates. Maximal degree in co-relation 28815. Up to 4302 conditions per place. [2023-08-30 01:23:18,983 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 98 selfloop transitions, 17 changer transitions 5/120 dead transitions. [2023-08-30 01:23:18,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 120 transitions, 1492 flow [2023-08-30 01:23:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 01:23:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 01:23:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1159 transitions. [2023-08-30 01:23:18,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083861874559549 [2023-08-30 01:23:18,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1159 transitions. [2023-08-30 01:23:18,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1159 transitions. [2023-08-30 01:23:18,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:18,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1159 transitions. [2023-08-30 01:23:18,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:18,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:18,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:18,988 INFO L175 Difference]: Start difference. First operand has 125 places, 114 transitions, 1231 flow. Second operand 6 states and 1159 transitions. [2023-08-30 01:23:18,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 120 transitions, 1492 flow [2023-08-30 01:23:19,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 1359 flow, removed 36 selfloop flow, removed 7 redundant places. [2023-08-30 01:23:19,144 INFO L231 Difference]: Finished difference. Result has 123 places, 111 transitions, 1119 flow [2023-08-30 01:23:19,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=123, PETRI_TRANSITIONS=111} [2023-08-30 01:23:19,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-08-30 01:23:19,145 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 111 transitions, 1119 flow [2023-08-30 01:23:19,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:19,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:19,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:19,154 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 [2023-08-30 01:23:19,346 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 [2023-08-30 01:23:19,347 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:19,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -933034719, now seen corresponding path program 1 times [2023-08-30 01:23:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:19,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091856623] [2023-08-30 01:23:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:23:19,347 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 [2023-08-30 01:23:19,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:19,348 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) [2023-08-30 01:23:19,349 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 [2023-08-30 01:23:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:23:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 01:23:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:23:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:23:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 01:23:19,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 01:23:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091856623] [2023-08-30 01:23:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091856623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:23:19,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:23:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-08-30 01:23:19,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053818202] [2023-08-30 01:23:19,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:23:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 01:23:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 01:23:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 01:23:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-30 01:23:19,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-30 01:23:19,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 111 transitions, 1119 flow. Second operand has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:19,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:23:19,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-30 01:23:19,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:23:21,617 INFO L130 PetriNetUnfolder]: 4043/7287 cut-off events. [2023-08-30 01:23:21,617 INFO L131 PetriNetUnfolder]: For 27495/27735 co-relation queries the response was YES. [2023-08-30 01:23:21,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34109 conditions, 7287 events. 4043/7287 cut-off events. For 27495/27735 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 46871 event pairs, 200 based on Foata normal form. 1020/8187 useless extension candidates. Maximal degree in co-relation 34057. Up to 3002 conditions per place. [2023-08-30 01:23:21,669 INFO L137 encePairwiseOnDemand]: 468/473 looper letters, 100 selfloop transitions, 64 changer transitions 0/168 dead transitions. [2023-08-30 01:23:21,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 168 transitions, 1815 flow [2023-08-30 01:23:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:23:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:23:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1999 transitions. [2023-08-30 01:23:21,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226215644820296 [2023-08-30 01:23:21,673 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1999 transitions. [2023-08-30 01:23:21,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1999 transitions. [2023-08-30 01:23:21,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:23:21,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1999 transitions. [2023-08-30 01:23:21,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 199.9) internal successors, (1999), 10 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:21,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:21,678 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:21,678 INFO L175 Difference]: Start difference. First operand has 123 places, 111 transitions, 1119 flow. Second operand 10 states and 1999 transitions. [2023-08-30 01:23:21,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 168 transitions, 1815 flow [2023-08-30 01:23:21,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1681 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 01:23:21,844 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 1267 flow [2023-08-30 01:23:21,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1267, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2023-08-30 01:23:21,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2023-08-30 01:23:21,845 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 1267 flow [2023-08-30 01:23:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 196.6) internal successors, (1966), 10 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:23:21,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:23:21,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:23:21,854 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 [2023-08-30 01:23:22,049 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 [2023-08-30 01:23:22,049 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-30 01:23:22,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:23:22,049 INFO L85 PathProgramCache]: Analyzing trace with hash 96043941, now seen corresponding path program 2 times [2023-08-30 01:23:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 01:23:22,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428536078] [2023-08-30 01:23:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:23:22,050 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 [2023-08-30 01:23:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 01:23:22,051 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) [2023-08-30 01:23:22,053 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 [2023-08-30 01:23:22,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:23:22,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:23:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 01:23:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:23:29,049 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 780 DAG size of output: 204 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 01:23:29,050 INFO L321 Elim1Store]: treesize reduction 1224, result has 22.0 percent of original size [2023-08-30 01:23:29,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 36 new quantified variables, introduced 190 case distinctions, treesize of input 21313 treesize of output 583 [2023-08-30 01:32:56,781 WARN L222 SmtUtils]: Spent 22.59s on a formula simplification. DAG size of input: 3853 DAG size of output: 3880 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 01:33:06,400 WARN L222 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 3843 DAG size of output: 3843 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15