./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:30:02,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:30:02,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:30:03,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:30:03,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:30:03,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:30:03,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:30:03,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:30:03,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:30:03,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:30:03,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:30:03,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:30:03,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:30:03,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:30:03,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:30:03,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:30:03,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:30:03,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:30:03,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:30:03,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:30:03,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:30:03,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:30:03,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:30:03,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:30:03,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:30:03,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:30:03,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:30:03,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:30:03,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:30:03,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:30:03,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:30:03,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:30:03,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:30:03,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:30:03,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:30:03,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:30:03,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:30:03,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:30:03,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:30:03,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:30:03,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:30:03,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:30:03,133 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:30:03,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:30:03,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:30:03,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:30:03,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:30:03,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:30:03,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:30:03,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:30:03,137 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:30:03,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:30:03,138 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:30:03,138 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:30:03,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:30:03,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:30:03,139 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:30:03,140 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:30:03,140 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:30:03,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:30:03,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:30:03,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:30:03,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:03,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:30:03,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:30:03,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:30:03,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:30:03,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:30:03,142 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:30:03,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:30:03,142 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:30:03,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:30:03,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:30:03,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:30:03,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:30:03,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:30:03,491 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:30:03,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 02:30:04,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:30:04,821 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:30:04,822 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 02:30:04,831 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d67234fb/dd2e6a00b0824f8e999a7c912aced292/FLAGa4fd93892 [2023-09-01 02:30:04,856 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d67234fb/dd2e6a00b0824f8e999a7c912aced292 [2023-09-01 02:30:04,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:30:04,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:30:04,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:04,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:30:04,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:30:04,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:04" (1/1) ... [2023-09-01 02:30:04,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df5a09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:04, skipping insertion in model container [2023-09-01 02:30:04,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:04" (1/1) ... [2023-09-01 02:30:04,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:30:04,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:05,079 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-09-01 02:30:05,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:05,116 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 02:30:05,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d0de405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:05, skipping insertion in model container [2023-09-01 02:30:05,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:05,119 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 02:30:05,122 INFO L158 Benchmark]: Toolchain (without parser) took 256.61ms. Allocated memory is still 75.5MB. Free memory was 52.8MB in the beginning and 42.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:30:05,123 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 36.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 02:30:05,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.30ms. Allocated memory is still 75.5MB. Free memory was 52.7MB in the beginning and 42.8MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 02:30:05,125 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 58.7MB. Free memory is still 36.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.30ms. Allocated memory is still 75.5MB. Free memory was 52.7MB in the beginning and 42.8MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 145]: 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/parallel-parallel-sum-1.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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:30:06,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:30:06,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:30:06,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:30:06,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:30:06,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:30:06,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:30:06,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:30:06,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:30:06,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:30:06,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:30:06,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:30:06,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:30:06,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:30:06,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:30:06,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:30:06,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:30:06,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:30:06,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:30:06,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:30:06,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:30:06,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:30:06,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:30:06,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:30:06,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:30:06,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:30:06,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:30:06,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:30:06,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:30:06,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:30:06,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:30:06,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:30:06,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:30:06,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:30:06,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:30:06,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:30:06,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:30:06,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:30:06,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:30:06,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:30:06,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:30:06,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 02:30:06,995 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:30:06,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:30:06,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:30:06,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:30:06,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:30:06,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:30:06,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:30:06,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:30:06,999 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:30:06,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:30:07,000 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:30:07,000 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:30:07,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:30:07,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:30:07,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:30:07,001 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:30:07,001 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:30:07,001 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:30:07,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:30:07,002 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:30:07,002 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 02:30:07,002 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 02:30:07,002 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:30:07,002 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:30:07,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:30:07,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:30:07,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:30:07,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:07,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:30:07,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:30:07,004 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 02:30:07,004 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 02:30:07,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:30:07,005 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:30:07,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:30:07,005 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 02:30:07,005 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:30:07,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:30:07,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:30:07,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:30:07,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:30:07,363 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:30:07,363 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:30:07,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 02:30:08,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:30:08,740 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:30:08,741 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-09-01 02:30:08,746 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7d330a1/7d8515b3812e4cac8c673cbeb1945b63/FLAG9f6454e3b [2023-09-01 02:30:08,763 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7d330a1/7d8515b3812e4cac8c673cbeb1945b63 [2023-09-01 02:30:08,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:30:08,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:30:08,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:08,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:30:08,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:30:08,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:08" (1/1) ... [2023-09-01 02:30:08,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f65e3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:08, skipping insertion in model container [2023-09-01 02:30:08,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:08" (1/1) ... [2023-09-01 02:30:08,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:30:08,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:09,008 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-09-01 02:30:09,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:09,045 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 02:30:09,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:30:09,087 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-09-01 02:30:09,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:09,106 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:30:09,139 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-09-01 02:30:09,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:30:09,162 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:30:09,162 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:30:09,168 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:30:09,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09 WrapperNode [2023-09-01 02:30:09,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:30:09,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:30:09,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:30:09,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:30:09,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,245 INFO L138 Inliner]: procedures = 29, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2023-09-01 02:30:09,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:30:09,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:30:09,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:30:09,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:30:09,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:30:09,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:30:09,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:30:09,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:30:09,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (1/1) ... [2023-09-01 02:30:09,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:30:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:30:09,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 02:30:09,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 02:30:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:30:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 02:30:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:30:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 02:30:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:30:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:30:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:30:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:30:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:30:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:30:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:30:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:30:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:30:09,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:30:09,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 02:30:09,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:30:09,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:30:09,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:30:09,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 02:30:09,432 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:30:09,598 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:30:09,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:30:10,276 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:30:10,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:30:10,433 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 02:30:10,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:10 BoogieIcfgContainer [2023-09-01 02:30:10,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:30:10,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:30:10,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:30:10,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:30:10,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:30:08" (1/3) ... [2023-09-01 02:30:10,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3726451b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:10, skipping insertion in model container [2023-09-01 02:30:10,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:09" (2/3) ... [2023-09-01 02:30:10,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3726451b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:10, skipping insertion in model container [2023-09-01 02:30:10,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:10" (3/3) ... [2023-09-01 02:30:10,443 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-09-01 02:30:10,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:30:10,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 02:30:10,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:30:10,566 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 02:30:10,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 226 transitions, 484 flow [2023-09-01 02:30:10,715 INFO L130 PetriNetUnfolder]: 15/222 cut-off events. [2023-09-01 02:30:10,716 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:30:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 15/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-09-01 02:30:10,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 226 transitions, 484 flow [2023-09-01 02:30:10,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 218 transitions, 460 flow [2023-09-01 02:30:10,738 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:30:10,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 218 transitions, 460 flow [2023-09-01 02:30:10,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 218 transitions, 460 flow [2023-09-01 02:30:10,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 218 transitions, 460 flow [2023-09-01 02:30:10,814 INFO L130 PetriNetUnfolder]: 15/218 cut-off events. [2023-09-01 02:30:10,814 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 02:30:10,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 15/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 222 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 170. Up to 2 conditions per place. [2023-09-01 02:30:10,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2023-09-01 02:30:34,967 INFO L134 LiptonReduction]: Checked pairs total: 8490 [2023-09-01 02:30:34,968 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-09-01 02:30:34,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:30:34,986 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;@3b3192ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:30:34,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-09-01 02:30:34,989 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 02:30:34,989 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:30:34,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:34,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:34,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:34,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 36328, now seen corresponding path program 1 times [2023-09-01 02:30:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894028826] [2023-09-01 02:30:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:35,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:35,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 02:30:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:35,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 02:30:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:35,293 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:30:35,294 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:30:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:35,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:35,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894028826] [2023-09-01 02:30:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894028826] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:35,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:35,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21882125] [2023-09-01 02:30:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:35,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:35,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:35,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-09-01 02:30:35,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:35,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:35,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-09-01 02:30:35,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:37,457 INFO L130 PetriNetUnfolder]: 12817/16564 cut-off events. [2023-09-01 02:30:37,458 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-09-01 02:30:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33602 conditions, 16564 events. 12817/16564 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 75502 event pairs, 10128 based on Foata normal form. 0/6626 useless extension candidates. Maximal degree in co-relation 28740. Up to 16564 conditions per place. [2023-09-01 02:30:37,622 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 02:30:37,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 248 flow [2023-09-01 02:30:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-09-01 02:30:37,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408133623819898 [2023-09-01 02:30:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-09-01 02:30:37,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-09-01 02:30:37,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:37,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-09-01 02:30:37,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:37,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:37,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:37,670 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 140 flow. Second operand 3 states and 607 transitions. [2023-09-01 02:30:37,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 248 flow [2023-09-01 02:30:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 232 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 02:30:37,690 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 122 flow [2023-09-01 02:30:37,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-09-01 02:30:37,696 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-09-01 02:30:37,696 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 122 flow [2023-09-01 02:30:37,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:37,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:37,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:37,709 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 [2023-09-01 02:30:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:37,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:37,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 36329, now seen corresponding path program 1 times [2023-09-01 02:30:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99578535] [2023-09-01 02:30:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:37,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:37,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 02:30:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 02:30:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:38,255 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:30:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:30:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:38,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:38,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99578535] [2023-09-01 02:30:38,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99578535] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:38,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:38,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943863293] [2023-09-01 02:30:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:38,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-09-01 02:30:38,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:38,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:38,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-09-01 02:30:38,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:41,833 INFO L130 PetriNetUnfolder]: 25633/33126 cut-off events. [2023-09-01 02:30:41,834 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:30:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66568 conditions, 33126 events. 25633/33126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 165092 event pairs, 20256 based on Foata normal form. 0/13251 useless extension candidates. Maximal degree in co-relation 66562. Up to 16565 conditions per place. [2023-09-01 02:30:42,034 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 108 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-09-01 02:30:42,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 458 flow [2023-09-01 02:30:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2023-09-01 02:30:42,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793028322440087 [2023-09-01 02:30:42,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2023-09-01 02:30:42,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2023-09-01 02:30:42,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:42,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2023-09-01 02:30:42,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:42,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:42,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:42,044 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 122 flow. Second operand 3 states and 660 transitions. [2023-09-01 02:30:42,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 458 flow [2023-09-01 02:30:42,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:42,048 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 133 flow [2023-09-01 02:30:42,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2023-09-01 02:30:42,049 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-09-01 02:30:42,050 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 133 flow [2023-09-01 02:30:42,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:42,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:42,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:42,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-09-01 02:30:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:42,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:42,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 36403, now seen corresponding path program 1 times [2023-09-01 02:30:42,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:42,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641651167] [2023-09-01 02:30:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:42,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:42,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 02:30:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:30:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:42,488 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2023-09-01 02:30:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2023-09-01 02:30:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:42,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:42,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:42,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641651167] [2023-09-01 02:30:42,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641651167] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:42,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:42,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:42,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894661572] [2023-09-01 02:30:42,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:42,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:42,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:42,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-09-01 02:30:42,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:42,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:42,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-09-01 02:30:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:44,925 INFO L130 PetriNetUnfolder]: 20633/26874 cut-off events. [2023-09-01 02:30:44,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:30:44,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54070 conditions, 26874 events. 20633/26874 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 131888 event pairs, 16256 based on Foata normal form. 0/11253 useless extension candidates. Maximal degree in co-relation 54062. Up to 26874 conditions per place. [2023-09-01 02:30:45,077 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 02:30:45,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 239 flow [2023-09-01 02:30:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-09-01 02:30:45,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439360929557008 [2023-09-01 02:30:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-09-01 02:30:45,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-09-01 02:30:45,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-09-01 02:30:45,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:45,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:45,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:45,085 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 133 flow. Second operand 3 states and 605 transitions. [2023-09-01 02:30:45,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 239 flow [2023-09-01 02:30:45,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:45,088 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 129 flow [2023-09-01 02:30:45,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-09-01 02:30:45,089 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2023-09-01 02:30:45,090 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 129 flow [2023-09-01 02:30:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:45,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:45,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 02:30:45,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 02:30:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:45,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:45,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 36404, now seen corresponding path program 1 times [2023-09-01 02:30:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:45,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930674184] [2023-09-01 02:30:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:45,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:45,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:45,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 02:30:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:30:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:45,577 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2023-09-01 02:30:45,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2023-09-01 02:30:45,617 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-09-01 02:30:45,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-09-01 02:30:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:45,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:45,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:45,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930674184] [2023-09-01 02:30:45,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930674184] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:45,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:45,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687441537] [2023-09-01 02:30:45,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:45,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:45,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:45,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:45,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-09-01 02:30:45,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:45,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:45,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-09-01 02:30:45,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:47,415 INFO L130 PetriNetUnfolder]: 15633/20622 cut-off events. [2023-09-01 02:30:47,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:30:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41566 conditions, 20622 events. 15633/20622 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 99651 event pairs, 12256 based on Foata normal form. 0/9253 useless extension candidates. Maximal degree in co-relation 41557. Up to 20622 conditions per place. [2023-09-01 02:30:47,508 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 02:30:47,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 231 flow [2023-09-01 02:30:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-09-01 02:30:47,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422657952069717 [2023-09-01 02:30:47,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-09-01 02:30:47,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-09-01 02:30:47,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:47,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-09-01 02:30:47,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:47,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:47,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:47,517 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 129 flow. Second operand 3 states and 609 transitions. [2023-09-01 02:30:47,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 231 flow [2023-09-01 02:30:47,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:47,519 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 126 flow [2023-09-01 02:30:47,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-09-01 02:30:47,519 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-09-01 02:30:47,520 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 126 flow [2023-09-01 02:30:47,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:47,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:47,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:30:47,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 02:30:47,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:47,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:47,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1128707, now seen corresponding path program 1 times [2023-09-01 02:30:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580236957] [2023-09-01 02:30:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:47,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:47,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:47,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:47,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 02:30:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:30:47,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:47,930 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:30:47,930 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:30:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:47,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:30:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:48,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580236957] [2023-09-01 02:30:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580236957] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:30:48,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:30:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 02:30:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413164189] [2023-09-01 02:30:48,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:30:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:30:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:30:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:30:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-09-01 02:30:48,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:48,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:48,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-09-01 02:30:48,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:51,088 INFO L130 PetriNetUnfolder]: 23451/30936 cut-off events. [2023-09-01 02:30:51,088 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:30:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62354 conditions, 30936 events. 23451/30936 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157766 event pairs, 18384 based on Foata normal form. 0/13883 useless extension candidates. Maximal degree in co-relation 62344. Up to 10312 conditions per place. [2023-09-01 02:30:51,289 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 149 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2023-09-01 02:30:51,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 156 transitions, 666 flow [2023-09-01 02:30:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:30:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:30:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1227 transitions. [2023-09-01 02:30:51,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455337690631808 [2023-09-01 02:30:51,294 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1227 transitions. [2023-09-01 02:30:51,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1227 transitions. [2023-09-01 02:30:51,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:51,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1227 transitions. [2023-09-01 02:30:51,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 204.5) internal successors, (1227), 6 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:51,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:51,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 459.0) internal successors, (3213), 7 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:51,305 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 126 flow. Second operand 6 states and 1227 transitions. [2023-09-01 02:30:51,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 156 transitions, 666 flow [2023-09-01 02:30:51,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 156 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:51,308 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 179 flow [2023-09-01 02:30:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-09-01 02:30:51,309 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-09-01 02:30:51,310 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 179 flow [2023-09-01 02:30:51,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:51,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:51,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:30:51,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 02:30:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:51,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:51,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 35010167, now seen corresponding path program 1 times [2023-09-01 02:30:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:51,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796924650] [2023-09-01 02:30:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:51,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:51,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:51,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 02:30:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:30:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:51,695 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-09-01 02:30:51,696 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 4 case distinctions, treesize of input 18 treesize of output 70 [2023-09-01 02:30:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:51,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:51,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796924650] [2023-09-01 02:30:51,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796924650] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:51,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:51,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:30:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582494418] [2023-09-01 02:30:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:51,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:30:51,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:30:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:30:51,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 459 [2023-09-01 02:30:51,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:51,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:51,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 459 [2023-09-01 02:30:51,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:53,150 INFO L130 PetriNetUnfolder]: 10854/14421 cut-off events. [2023-09-01 02:30:53,150 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 02:30:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29137 conditions, 14421 events. 10854/14421 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66097 event pairs, 7947 based on Foata normal form. 0/7605 useless extension candidates. Maximal degree in co-relation 29122. Up to 14414 conditions per place. [2023-09-01 02:30:53,201 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 02:30:53,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 279 flow [2023-09-01 02:30:53,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:30:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:30:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 776 transitions. [2023-09-01 02:30:53,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226579520697168 [2023-09-01 02:30:53,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 776 transitions. [2023-09-01 02:30:53,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 776 transitions. [2023-09-01 02:30:53,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:53,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 776 transitions. [2023-09-01 02:30:53,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:53,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:53,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:53,210 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 179 flow. Second operand 4 states and 776 transitions. [2023-09-01 02:30:53,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 279 flow [2023-09-01 02:30:53,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 269 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:53,212 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 169 flow [2023-09-01 02:30:53,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-09-01 02:30:53,213 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-09-01 02:30:53,213 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 169 flow [2023-09-01 02:30:53,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:53,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:53,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:30:53,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 02:30:53,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:53,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:53,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash 35010169, now seen corresponding path program 1 times [2023-09-01 02:30:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:53,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798239551] [2023-09-01 02:30:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:53,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:53,427 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:53,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 02:30:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:30:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:53,676 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-09-01 02:30:53,677 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-09-01 02:30:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:53,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:53,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798239551] [2023-09-01 02:30:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798239551] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:53,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:30:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617912674] [2023-09-01 02:30:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:30:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:30:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:30:54,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-09-01 02:30:54,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:54,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:54,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-09-01 02:30:54,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:55,784 INFO L130 PetriNetUnfolder]: 14478/19323 cut-off events. [2023-09-01 02:30:55,784 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-09-01 02:30:55,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39009 conditions, 19323 events. 14478/19323 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 99034 event pairs, 2571 based on Foata normal form. 0/10155 useless extension candidates. Maximal degree in co-relation 38993. Up to 15241 conditions per place. [2023-09-01 02:30:55,893 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 87 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-09-01 02:30:55,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 440 flow [2023-09-01 02:30:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:30:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:30:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 805 transitions. [2023-09-01 02:30:55,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384531590413943 [2023-09-01 02:30:55,896 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 805 transitions. [2023-09-01 02:30:55,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 805 transitions. [2023-09-01 02:30:55,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:55,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 805 transitions. [2023-09-01 02:30:55,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:55,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:55,900 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:55,900 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 169 flow. Second operand 4 states and 805 transitions. [2023-09-01 02:30:55,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 440 flow [2023-09-01 02:30:55,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 435 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:30:55,904 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 193 flow [2023-09-01 02:30:55,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-09-01 02:30:55,905 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-09-01 02:30:55,905 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 193 flow [2023-09-01 02:30:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:55,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:55,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:30:55,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 02:30:56,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:56,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:56,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash 35010198, now seen corresponding path program 1 times [2023-09-01 02:30:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:56,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702889540] [2023-09-01 02:30:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:56,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:56,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:56,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 02:30:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 02:30:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:56,306 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2023-09-01 02:30:56,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2023-09-01 02:30:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:56,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:56,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702889540] [2023-09-01 02:30:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702889540] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:56,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513604945] [2023-09-01 02:30:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:56,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-09-01 02:30:56,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:56,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:56,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-09-01 02:30:56,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:57,984 INFO L130 PetriNetUnfolder]: 13596/18135 cut-off events. [2023-09-01 02:30:57,984 INFO L131 PetriNetUnfolder]: For 2160/2160 co-relation queries the response was YES. [2023-09-01 02:30:58,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40995 conditions, 18135 events. 13596/18135 cut-off events. For 2160/2160 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 85611 event pairs, 9576 based on Foata normal form. 0/11892 useless extension candidates. Maximal degree in co-relation 40978. Up to 18135 conditions per place. [2023-09-01 02:30:58,056 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 53 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-09-01 02:30:58,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 297 flow [2023-09-01 02:30:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-09-01 02:30:58,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-09-01 02:30:58,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-09-01 02:30:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-09-01 02:30:58,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:58,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-09-01 02:30:58,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:58,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:58,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:58,063 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 193 flow. Second operand 3 states and 597 transitions. [2023-09-01 02:30:58,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 297 flow [2023-09-01 02:30:58,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:30:58,065 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 184 flow [2023-09-01 02:30:58,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-09-01 02:30:58,072 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-09-01 02:30:58,072 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 184 flow [2023-09-01 02:30:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:58,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:58,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 02:30:58,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 02:30:58,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:58,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:30:58,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:30:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 35010200, now seen corresponding path program 1 times [2023-09-01 02:30:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:30:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703331381] [2023-09-01 02:30:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:30:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:30:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:30:58,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:30:58,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 02:30:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:30:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 02:30:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:30:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:30:58,511 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-09-01 02:30:58,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-09-01 02:30:58,535 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 02:30:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-09-01 02:30:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:30:58,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:30:58,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:30:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703331381] [2023-09-01 02:30:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703331381] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:30:58,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:30:58,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:30:58,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791361651] [2023-09-01 02:30:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:30:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:30:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:30:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:30:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:30:58,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-09-01 02:30:58,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:58,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:30:58,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-09-01 02:30:58,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:30:59,845 INFO L130 PetriNetUnfolder]: 12714/16947 cut-off events. [2023-09-01 02:30:59,846 INFO L131 PetriNetUnfolder]: For 2051/2051 co-relation queries the response was YES. [2023-09-01 02:30:59,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37689 conditions, 16947 events. 12714/16947 cut-off events. For 2051/2051 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 79071 event pairs, 8937 based on Foata normal form. 0/11349 useless extension candidates. Maximal degree in co-relation 37672. Up to 16947 conditions per place. [2023-09-01 02:30:59,963 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 51 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-09-01 02:30:59,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 284 flow [2023-09-01 02:30:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:30:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:30:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-09-01 02:30:59,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364560639070443 [2023-09-01 02:30:59,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-09-01 02:30:59,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-09-01 02:30:59,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:30:59,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-09-01 02:30:59,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:59,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:59,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:59,970 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 184 flow. Second operand 3 states and 601 transitions. [2023-09-01 02:30:59,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 284 flow [2023-09-01 02:30:59,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:30:59,972 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 181 flow [2023-09-01 02:30:59,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-09-01 02:30:59,973 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-09-01 02:30:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 181 flow [2023-09-01 02:30:59,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:30:59,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:30:59,974 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 02:30:59,984 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 [2023-09-01 02:31:00,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:00,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:00,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash -731937687, now seen corresponding path program 2 times [2023-09-01 02:31:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:00,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30419643] [2023-09-01 02:31:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:31:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:00,182 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:00,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 02:31:00,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:31:00,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:31:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:31:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:00,421 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:31:00,421 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:31:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:31:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:01,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30419643] [2023-09-01 02:31:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30419643] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:31:01,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:31:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:31:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504068736] [2023-09-01 02:31:01,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:31:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:31:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:31:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:31:03,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-09-01 02:31:03,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 181 flow. Second operand has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:03,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:03,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-09-01 02:31:03,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:11,770 INFO L130 PetriNetUnfolder]: 42372/56474 cut-off events. [2023-09-01 02:31:11,770 INFO L131 PetriNetUnfolder]: For 6821/6821 co-relation queries the response was YES. [2023-09-01 02:31:11,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125523 conditions, 56474 events. 42372/56474 cut-off events. For 6821/6821 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 300970 event pairs, 29790 based on Foata normal form. 6/37820 useless extension candidates. Maximal degree in co-relation 125505. Up to 11421 conditions per place. [2023-09-01 02:31:12,078 INFO L137 encePairwiseOnDemand]: 455/459 looper letters, 432 selfloop transitions, 12 changer transitions 0/444 dead transitions. [2023-09-01 02:31:12,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 444 transitions, 2113 flow [2023-09-01 02:31:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:31:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:31:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2578 transitions. [2023-09-01 02:31:12,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46804647785039943 [2023-09-01 02:31:12,085 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2578 transitions. [2023-09-01 02:31:12,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2578 transitions. [2023-09-01 02:31:12,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:12,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2578 transitions. [2023-09-01 02:31:12,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.83333333333334) internal successors, (2578), 12 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:12,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:12,100 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 459.0) internal successors, (5967), 13 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:12,100 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 181 flow. Second operand 12 states and 2578 transitions. [2023-09-01 02:31:12,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 444 transitions, 2113 flow [2023-09-01 02:31:12,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 444 transitions, 2112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:12,107 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 281 flow [2023-09-01 02:31:12,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2023-09-01 02:31:12,107 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 14 predicate places. [2023-09-01 02:31:12,107 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 281 flow [2023-09-01 02:31:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.0) internal successors, (2160), 12 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:12,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:12,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:31:12,121 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 [2023-09-01 02:31:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:12,318 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:12,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash -714940251, now seen corresponding path program 1 times [2023-09-01 02:31:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:12,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685242165] [2023-09-01 02:31:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:12,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:12,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:12,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:12,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 02:31:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:12,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:31:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:12,560 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:31:12,561 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:31:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:12,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:12,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:12,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685242165] [2023-09-01 02:31:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685242165] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:31:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033072824] [2023-09-01 02:31:12,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:31:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:31:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:31:12,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-09-01 02:31:12,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:12,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:12,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-09-01 02:31:12,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:17,417 INFO L130 PetriNetUnfolder]: 38488/51408 cut-off events. [2023-09-01 02:31:17,417 INFO L131 PetriNetUnfolder]: For 6316/6316 co-relation queries the response was YES. [2023-09-01 02:31:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114200 conditions, 51408 events. 38488/51408 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 272712 event pairs, 27164 based on Foata normal form. 156/34598 useless extension candidates. Maximal degree in co-relation 114174. Up to 50828 conditions per place. [2023-09-01 02:31:17,744 INFO L137 encePairwiseOnDemand]: 452/459 looper letters, 87 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-09-01 02:31:17,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 538 flow [2023-09-01 02:31:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:31:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:31:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-09-01 02:31:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-09-01 02:31:17,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-09-01 02:31:17,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-09-01 02:31:17,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:17,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-09-01 02:31:17,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:17,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:17,752 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:17,752 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 281 flow. Second operand 4 states and 796 transitions. [2023-09-01 02:31:17,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 538 flow [2023-09-01 02:31:17,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 90 transitions, 513 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 02:31:17,755 INFO L231 Difference]: Finished difference. Result has 81 places, 60 transitions, 285 flow [2023-09-01 02:31:17,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=81, PETRI_TRANSITIONS=60} [2023-09-01 02:31:17,756 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2023-09-01 02:31:17,756 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 60 transitions, 285 flow [2023-09-01 02:31:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:17,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:17,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:31:17,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 02:31:17,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:17,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:17,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:17,966 INFO L85 PathProgramCache]: Analyzing trace with hash -714909148, now seen corresponding path program 1 times [2023-09-01 02:31:17,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:17,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793579374] [2023-09-01 02:31:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:17,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:17,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:17,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:17,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 02:31:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 02:31:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:18,138 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 02:31:18,138 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 5 case distinctions, treesize of input 36 treesize of output 51 [2023-09-01 02:31:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:18,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:18,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793579374] [2023-09-01 02:31:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793579374] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:18,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100022049] [2023-09-01 02:31:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:18,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 459 [2023-09-01 02:31:18,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 60 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:18,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:18,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 459 [2023-09-01 02:31:18,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:22,686 INFO L130 PetriNetUnfolder]: 37536/49975 cut-off events. [2023-09-01 02:31:22,686 INFO L131 PetriNetUnfolder]: For 13401/13401 co-relation queries the response was YES. [2023-09-01 02:31:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118255 conditions, 49975 events. 37536/49975 cut-off events. For 13401/13401 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 262809 event pairs, 26464 based on Foata normal form. 0/38824 useless extension candidates. Maximal degree in co-relation 118226. Up to 49975 conditions per place. [2023-09-01 02:31:23,052 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-09-01 02:31:23,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 397 flow [2023-09-01 02:31:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-09-01 02:31:23,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064633260711693 [2023-09-01 02:31:23,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-09-01 02:31:23,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-09-01 02:31:23,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:23,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-09-01 02:31:23,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 02:31:23,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:23,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:23,057 INFO L175 Difference]: Start difference. First operand has 81 places, 60 transitions, 285 flow. Second operand 3 states and 593 transitions. [2023-09-01 02:31:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 397 flow [2023-09-01 02:31:23,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 387 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 02:31:23,062 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 273 flow [2023-09-01 02:31:23,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2023-09-01 02:31:23,065 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-09-01 02:31:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 273 flow [2023-09-01 02:31:23,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:23,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:23,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 02:31:23,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 02:31:23,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:23,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:23,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -714909146, now seen corresponding path program 1 times [2023-09-01 02:31:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203413524] [2023-09-01 02:31:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:23,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:23,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 02:31:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 02:31:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:23,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:31:23,497 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 02:31:23,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-09-01 02:31:23,516 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 18 treesize of output 16 [2023-09-01 02:31:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:23,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:23,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203413524] [2023-09-01 02:31:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203413524] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:23,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:23,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:31:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221787708] [2023-09-01 02:31:23,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:23,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:31:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:31:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:31:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-09-01 02:31:23,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:23,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:23,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-09-01 02:31:23,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:27,983 INFO L130 PetriNetUnfolder]: 36584/48542 cut-off events. [2023-09-01 02:31:27,983 INFO L131 PetriNetUnfolder]: For 13106/13106 co-relation queries the response was YES. [2023-09-01 02:31:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115025 conditions, 48542 events. 36584/48542 cut-off events. For 13106/13106 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 252518 event pairs, 25764 based on Foata normal form. 0/38094 useless extension candidates. Maximal degree in co-relation 114996. Up to 48542 conditions per place. [2023-09-01 02:31:28,322 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 02:31:28,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 56 transitions, 381 flow [2023-09-01 02:31:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:31:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:31:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-09-01 02:31:28,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-09-01 02:31:28,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-09-01 02:31:28,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-09-01 02:31:28,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:28,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-09-01 02:31:28,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:28,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:28,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:28,329 INFO L175 Difference]: Start difference. First operand has 79 places, 58 transitions, 273 flow. Second operand 3 states and 597 transitions. [2023-09-01 02:31:28,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 56 transitions, 381 flow [2023-09-01 02:31:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:28,333 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 270 flow [2023-09-01 02:31:28,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-09-01 02:31:28,333 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-09-01 02:31:28,334 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 270 flow [2023-09-01 02:31:28,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:28,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:28,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:31:28,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 02:31:28,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:28,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:28,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1198231873, now seen corresponding path program 1 times [2023-09-01 02:31:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701675108] [2023-09-01 02:31:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:28,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:28,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:28,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:28,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 02:31:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:31:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:28,799 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:31:28,799 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:31:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:28,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:31:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:29,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701675108] [2023-09-01 02:31:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701675108] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:31:29,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:31:29,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:31:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464703138] [2023-09-01 02:31:29,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:31:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:31:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:31:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:31:32,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-09-01 02:31:32,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:32,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:32,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-09-01 02:31:32,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:36,943 INFO L130 PetriNetUnfolder]: 33254/44226 cut-off events. [2023-09-01 02:31:36,943 INFO L131 PetriNetUnfolder]: For 12598/12598 co-relation queries the response was YES. [2023-09-01 02:31:37,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104570 conditions, 44226 events. 33254/44226 cut-off events. For 12598/12598 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 229071 event pairs, 23504 based on Foata normal form. 234/34986 useless extension candidates. Maximal degree in co-relation 104540. Up to 42684 conditions per place. [2023-09-01 02:31:37,289 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 107 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2023-09-01 02:31:37,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 639 flow [2023-09-01 02:31:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:31:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:31:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2023-09-01 02:31:37,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41083099906629317 [2023-09-01 02:31:37,294 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2023-09-01 02:31:37,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2023-09-01 02:31:37,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:37,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2023-09-01 02:31:37,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:37,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:37,300 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:37,301 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 270 flow. Second operand 7 states and 1320 transitions. [2023-09-01 02:31:37,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 639 flow [2023-09-01 02:31:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 113 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:31:37,305 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 302 flow [2023-09-01 02:31:37,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2023-09-01 02:31:37,306 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2023-09-01 02:31:37,306 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 302 flow [2023-09-01 02:31:37,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.55555555555554) internal successors, (1580), 9 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:37,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:37,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 02:31:37,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-09-01 02:31:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:37,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:37,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 999597029, now seen corresponding path program 2 times [2023-09-01 02:31:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:37,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915654462] [2023-09-01 02:31:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:31:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:37,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:37,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 02:31:37,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:31:37,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:31:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 02:31:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:37,803 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-09-01 02:31:37,804 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-09-01 02:31:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:38,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:31:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:38,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915654462] [2023-09-01 02:31:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915654462] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:31:38,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:31:38,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 02:31:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687959384] [2023-09-01 02:31:38,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:31:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:31:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:31:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:31:40,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 459 [2023-09-01 02:31:40,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 302 flow. Second operand has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:40,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:40,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 459 [2023-09-01 02:31:40,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:31:53,617 INFO L130 PetriNetUnfolder]: 76358/101354 cut-off events. [2023-09-01 02:31:53,617 INFO L131 PetriNetUnfolder]: For 22972/22972 co-relation queries the response was YES. [2023-09-01 02:31:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235629 conditions, 101354 events. 76358/101354 cut-off events. For 22972/22972 co-relation queries the response was YES. Maximal size of possible extension queue 2237. Compared 593349 event pairs, 6224 based on Foata normal form. 8/84240 useless extension candidates. Maximal degree in co-relation 235596. Up to 35331 conditions per place. [2023-09-01 02:31:54,502 INFO L137 encePairwiseOnDemand]: 451/459 looper letters, 220 selfloop transitions, 19 changer transitions 1/240 dead transitions. [2023-09-01 02:31:54,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 240 transitions, 1224 flow [2023-09-01 02:31:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:31:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:31:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2161 transitions. [2023-09-01 02:31:54,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42800554565260446 [2023-09-01 02:31:54,509 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2161 transitions. [2023-09-01 02:31:54,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2161 transitions. [2023-09-01 02:31:54,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:31:54,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2161 transitions. [2023-09-01 02:31:54,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.45454545454547) internal successors, (2161), 11 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:54,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:54,519 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 459.0) internal successors, (5508), 12 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:54,519 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 302 flow. Second operand 11 states and 2161 transitions. [2023-09-01 02:31:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 240 transitions, 1224 flow [2023-09-01 02:31:54,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 240 transitions, 1207 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 02:31:54,532 INFO L231 Difference]: Finished difference. Result has 97 places, 65 transitions, 402 flow [2023-09-01 02:31:54,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=402, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2023-09-01 02:31:54,532 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-09-01 02:31:54,533 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 402 flow [2023-09-01 02:31:54,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:54,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:31:54,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:31:54,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 02:31:54,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:54,743 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:31:54,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:31:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 167104997, now seen corresponding path program 1 times [2023-09-01 02:31:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:31:54,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541807427] [2023-09-01 02:31:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:31:54,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:31:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:31:54,745 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:31:54,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 02:31:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:31:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:31:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:31:54,971 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-09-01 02:31:54,971 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-09-01 02:31:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:31:55,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:31:55,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:31:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541807427] [2023-09-01 02:31:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541807427] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:31:55,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:31:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:31:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034735995] [2023-09-01 02:31:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:31:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:31:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:31:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:31:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:31:55,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 459 [2023-09-01 02:31:55,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:31:55,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:31:55,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 459 [2023-09-01 02:31:55,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:07,718 INFO L130 PetriNetUnfolder]: 99380/131928 cut-off events. [2023-09-01 02:32:07,718 INFO L131 PetriNetUnfolder]: For 157148/157148 co-relation queries the response was YES. [2023-09-01 02:32:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354198 conditions, 131928 events. 99380/131928 cut-off events. For 157148/157148 co-relation queries the response was YES. Maximal size of possible extension queue 2823. Compared 793207 event pairs, 17618 based on Foata normal form. 0/116740 useless extension candidates. Maximal degree in co-relation 354160. Up to 104035 conditions per place. [2023-09-01 02:32:09,077 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 93 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-09-01 02:32:09,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 783 flow [2023-09-01 02:32:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:32:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:32:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 785 transitions. [2023-09-01 02:32:09,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275599128540305 [2023-09-01 02:32:09,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 785 transitions. [2023-09-01 02:32:09,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 785 transitions. [2023-09-01 02:32:09,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:09,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 785 transitions. [2023-09-01 02:32:09,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:09,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:09,083 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 459.0) internal successors, (2295), 5 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:09,083 INFO L175 Difference]: Start difference. First operand has 97 places, 65 transitions, 402 flow. Second operand 4 states and 785 transitions. [2023-09-01 02:32:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 783 flow [2023-09-01 02:32:09,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 723 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-09-01 02:32:09,249 INFO L231 Difference]: Finished difference. Result has 94 places, 67 transitions, 402 flow [2023-09-01 02:32:09,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=94, PETRI_TRANSITIONS=67} [2023-09-01 02:32:09,249 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2023-09-01 02:32:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 67 transitions, 402 flow [2023-09-01 02:32:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:09,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:09,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:09,257 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 [2023-09-01 02:32:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:09,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:32:09,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash 167105029, now seen corresponding path program 1 times [2023-09-01 02:32:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945759674] [2023-09-01 02:32:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:09,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:09,452 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:32:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 02:32:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 02:32:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 02:32:09,657 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 02:32:09,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-09-01 02:32:09,664 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 22 treesize of output 20 [2023-09-01 02:32:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:09,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:09,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945759674] [2023-09-01 02:32:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945759674] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:32:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325418132] [2023-09-01 02:32:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:09,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 459 [2023-09-01 02:32:09,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 67 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:09,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:09,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 459 [2023-09-01 02:32:09,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:21,214 INFO L130 PetriNetUnfolder]: 92449/122509 cut-off events. [2023-09-01 02:32:21,214 INFO L131 PetriNetUnfolder]: For 119702/119702 co-relation queries the response was YES. [2023-09-01 02:32:21,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347401 conditions, 122509 events. 92449/122509 cut-off events. For 119702/119702 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 710003 event pairs, 65557 based on Foata normal form. 0/120021 useless extension candidates. Maximal degree in co-relation 347365. Up to 122509 conditions per place. [2023-09-01 02:32:22,327 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-09-01 02:32:22,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 65 transitions, 528 flow [2023-09-01 02:32:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-09-01 02:32:22,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2023-09-01 02:32:22,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-09-01 02:32:22,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-09-01 02:32:22,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:22,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-09-01 02:32:22,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:22,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:22,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:22,332 INFO L175 Difference]: Start difference. First operand has 94 places, 67 transitions, 402 flow. Second operand 3 states and 595 transitions. [2023-09-01 02:32:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 65 transitions, 528 flow [2023-09-01 02:32:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 65 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:32:22,521 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 390 flow [2023-09-01 02:32:22,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=390, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2023-09-01 02:32:22,521 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 26 predicate places. [2023-09-01 02:32:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 390 flow [2023-09-01 02:32:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:22,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:22,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:22,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:22,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:22,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:32:22,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash 167105028, now seen corresponding path program 1 times [2023-09-01 02:32:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:22,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085699352] [2023-09-01 02:32:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:22,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:22,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:32:22,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 02:32:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 02:32:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:22,909 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2023-09-01 02:32:22,909 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 4 case distinctions, treesize of input 18 treesize of output 36 [2023-09-01 02:32:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:22,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 02:32:22,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:22,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085699352] [2023-09-01 02:32:22,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085699352] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:32:22,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:32:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:32:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448716420] [2023-09-01 02:32:22,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:32:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:32:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:32:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:32:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 459 [2023-09-01 02:32:23,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:23,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:23,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 459 [2023-09-01 02:32:23,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:33,694 INFO L130 PetriNetUnfolder]: 85518/113090 cut-off events. [2023-09-01 02:32:33,694 INFO L131 PetriNetUnfolder]: For 108690/108690 co-relation queries the response was YES. [2023-09-01 02:32:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316179 conditions, 113090 events. 85518/113090 cut-off events. For 108690/108690 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 648387 event pairs, 60184 based on Foata normal form. 0/113090 useless extension candidates. Maximal degree in co-relation 316143. Up to 113090 conditions per place. [2023-09-01 02:32:34,690 INFO L137 encePairwiseOnDemand]: 456/459 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-09-01 02:32:34,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 63 transitions, 512 flow [2023-09-01 02:32:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:32:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:32:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-09-01 02:32:34,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-09-01 02:32:34,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-09-01 02:32:34,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-09-01 02:32:34,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:34,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-09-01 02:32:34,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:34,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:34,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 459.0) internal successors, (1836), 4 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:34,694 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 390 flow. Second operand 3 states and 578 transitions. [2023-09-01 02:32:34,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 63 transitions, 512 flow [2023-09-01 02:32:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 63 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:34,911 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 387 flow [2023-09-01 02:32:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2023-09-01 02:32:34,911 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2023-09-01 02:32:34,911 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 387 flow [2023-09-01 02:32:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:34,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:34,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:34,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:35,113 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:32:35,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 418533457, now seen corresponding path program 1 times [2023-09-01 02:32:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:35,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976040558] [2023-09-01 02:32:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:32:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:35,114 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:32:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 02:32:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:32:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:32:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:35,345 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-09-01 02:32:35,345 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 4 case distinctions, treesize of input 20 treesize of output 62 [2023-09-01 02:32:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:35,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:32:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:32:35,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:35,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976040558] [2023-09-01 02:32:35,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976040558] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:32:35,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:32:35,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 02:32:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770068872] [2023-09-01 02:32:35,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:32:35,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:32:35,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:35,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:32:35,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:32:37,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 459 [2023-09-01 02:32:37,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 387 flow. Second operand has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:37,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:37,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 459 [2023-09-01 02:32:37,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:32:48,813 INFO L130 PetriNetUnfolder]: 84836/112142 cut-off events. [2023-09-01 02:32:48,813 INFO L131 PetriNetUnfolder]: For 116657/116657 co-relation queries the response was YES. [2023-09-01 02:32:49,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313767 conditions, 112142 events. 84836/112142 cut-off events. For 116657/116657 co-relation queries the response was YES. Maximal size of possible extension queue 2491. Compared 633434 event pairs, 59682 based on Foata normal form. 66/112208 useless extension candidates. Maximal degree in co-relation 313730. Up to 111724 conditions per place. [2023-09-01 02:32:49,798 INFO L137 encePairwiseOnDemand]: 453/459 looper letters, 97 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-09-01 02:32:49,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 103 transitions, 701 flow [2023-09-01 02:32:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:32:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:32:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1300 transitions. [2023-09-01 02:32:49,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046062869592281 [2023-09-01 02:32:49,802 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1300 transitions. [2023-09-01 02:32:49,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1300 transitions. [2023-09-01 02:32:49,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:32:49,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1300 transitions. [2023-09-01 02:32:49,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.71428571428572) internal successors, (1300), 7 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:49,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:49,806 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 459.0) internal successors, (3672), 8 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:49,806 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 387 flow. Second operand 7 states and 1300 transitions. [2023-09-01 02:32:49,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 103 transitions, 701 flow [2023-09-01 02:32:49,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 103 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:32:49,929 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 403 flow [2023-09-01 02:32:49,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=459, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2023-09-01 02:32:49,929 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2023-09-01 02:32:49,930 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 403 flow [2023-09-01 02:32:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.44444444444446) internal successors, (1588), 9 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:49,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:32:49,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:32:49,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 02:32:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:50,134 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-09-01 02:32:50,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:32:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 149389943, now seen corresponding path program 2 times [2023-09-01 02:32:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 02:32:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094907924] [2023-09-01 02:32:50,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:32:50,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 02:32:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 02:32:50,136 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 02:32:50,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 02:32:50,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:32:50,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:32:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 02:32:50,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:32:50,407 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2023-09-01 02:32:50,407 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 4 case distinctions, treesize of input 22 treesize of output 64 [2023-09-01 02:32:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:32:50,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:32:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 02:32:51,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 02:32:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094907924] [2023-09-01 02:32:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094907924] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:32:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 02:32:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 02:32:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133571314] [2023-09-01 02:32:51,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 02:32:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:32:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 02:32:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:32:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:32:52,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 459 [2023-09-01 02:32:52,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 403 flow. Second operand has 8 states, 8 states have (on average 180.75) internal successors, (1446), 8 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:32:52,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:32:52,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 459 [2023-09-01 02:32:52,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand