./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:02:35,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:02:35,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:02:35,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:02:35,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:02:35,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:02:35,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:02:35,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:02:35,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:02:35,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:02:35,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:02:35,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:02:35,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:02:35,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:02:35,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:02:35,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:02:35,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:02:35,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:02:35,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:02:35,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:02:35,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:02:35,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:02:35,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:02:35,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:02:35,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:02:35,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:02:35,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:02:35,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:02:35,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:02:35,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:02:35,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:02:35,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:02:35,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:02:35,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:02:35,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:02:35,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:02:35,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:02:35,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:02:35,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:02:35,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:02:35,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:02:35,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:02:35,924 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:02:35,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:02:35,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:02:35,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:02:35,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:02:35,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:02:35,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:02:35,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:02:35,927 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:02:35,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:02:35,928 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:02:35,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:02:35,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:02:35,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:02:35,929 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:02:35,930 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:02:35,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:02:35,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:02:35,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:02:35,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:02:35,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:02:35,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:02:35,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:02:35,932 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:02:36,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:02:36,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:02:36,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:02:36,248 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:02:36,248 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:02:36,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 05:02:37,225 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:02:37,441 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:02:37,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 05:02:37,453 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f71ef54b5/bfe4f9a5d3b84f63b57bc9f1258ec9fa/FLAGa90629725 [2023-08-30 05:02:37,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f71ef54b5/bfe4f9a5d3b84f63b57bc9f1258ec9fa [2023-08-30 05:02:37,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:02:37,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:02:37,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:02:37,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:02:37,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:02:37,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:02:37" (1/1) ... [2023-08-30 05:02:37,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295d4388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:37, skipping insertion in model container [2023-08-30 05:02:37,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:02:37" (1/1) ... [2023-08-30 05:02:37,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:02:37,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:02:37,660 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 05:02:37,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:02:37,678 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 05:02:37,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c1ac326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:37, skipping insertion in model container [2023-08-30 05:02:37,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:02:37,680 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:02:37,682 INFO L158 Benchmark]: Toolchain (without parser) took 205.76ms. Allocated memory is still 60.8MB. Free memory was 38.3MB in the beginning and 28.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 05:02:37,682 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 50.3MB. Free memory is still 27.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:02:37,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.81ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 28.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 05:02:37,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 50.3MB. Free memory is still 27.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.81ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 28.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 122]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:02:39,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:02:39,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:02:39,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:02:39,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:02:39,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:02:39,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:02:39,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:02:39,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:02:39,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:02:39,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:02:39,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:02:39,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:02:39,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:02:39,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:02:39,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:02:39,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:02:39,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:02:39,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:02:39,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:02:39,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:02:39,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:02:39,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:02:39,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:02:39,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:02:39,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:02:39,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:02:39,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:02:39,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:02:39,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:02:39,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:02:39,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:02:39,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:02:39,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:02:39,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:02:39,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:02:39,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:02:39,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:02:39,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:02:39,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:02:39,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:02:39,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:02:39,445 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:02:39,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:02:39,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:02:39,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:02:39,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:02:39,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:02:39,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:02:39,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:02:39,449 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:02:39,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:02:39,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:02:39,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:02:39,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:02:39,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:02:39,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:02:39,452 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:02:39,452 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:02:39,452 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:02:39,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:02:39,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:02:39,453 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:02:39,453 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:02:39,453 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:02:39,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:02:39,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:02:39,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:02:39,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:02:39,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:02:39,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:02:39,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:02:39,455 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:02:39,456 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:02:39,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:02:39,456 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:02:39,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:02:39,457 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:02:39,457 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:02:39,457 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908fbcc4d3742ed9abcae99df082df11caf0d6bd4e74389f515555cf6e492354 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:02:39,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:02:39,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:02:39,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:02:39,820 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:02:39,821 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:02:39,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 05:02:40,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:02:41,168 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:02:41,170 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-08-30 05:02:41,178 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b33376c62/2c6f0549fecf495d88fc0d6ba2a16223/FLAG4bcae7748 [2023-08-30 05:02:41,191 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b33376c62/2c6f0549fecf495d88fc0d6ba2a16223 [2023-08-30 05:02:41,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:02:41,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:02:41,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:02:41,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:02:41,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:02:41,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593c59fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41, skipping insertion in model container [2023-08-30 05:02:41,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:02:41,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:02:41,359 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 05:02:41,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:02:41,373 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:02:41,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:02:41,387 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 05:02:41,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:02:41,393 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:02:41,407 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2023-08-30 05:02:41,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:02:41,420 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:02:41,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41 WrapperNode [2023-08-30 05:02:41,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:02:41,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:02:41,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:02:41,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:02:41,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,473 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2023-08-30 05:02:41,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:02:41,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:02:41,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:02:41,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:02:41,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:02:41,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:02:41,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:02:41,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:02:41,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (1/1) ... [2023-08-30 05:02:41,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:02:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:02:41,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 05:02:41,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 05:02:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:02:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:02:41,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:02:41,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:02:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:02:41,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:02:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:02:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:02:41,592 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:02:41,729 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:02:41,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:02:42,142 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:02:42,149 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:02:42,149 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 05:02:42,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:02:42 BoogieIcfgContainer [2023-08-30 05:02:42,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:02:42,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:02:42,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:02:42,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:02:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:02:41" (1/3) ... [2023-08-30 05:02:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f098e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:02:42, skipping insertion in model container [2023-08-30 05:02:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:02:41" (2/3) ... [2023-08-30 05:02:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f098e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:02:42, skipping insertion in model container [2023-08-30 05:02:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:02:42" (3/3) ... [2023-08-30 05:02:42,156 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-08-30 05:02:42,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:02:42,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 05:02:42,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:02:42,295 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 05:02:42,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 265 transitions, 546 flow [2023-08-30 05:02:42,460 INFO L130 PetriNetUnfolder]: 19/263 cut-off events. [2023-08-30 05:02:42,461 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:02:42,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 263 events. 19/263 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 523 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-08-30 05:02:42,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 265 transitions, 546 flow [2023-08-30 05:02:42,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 259 transitions, 530 flow [2023-08-30 05:02:42,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:02:42,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 259 transitions, 530 flow [2023-08-30 05:02:42,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 259 transitions, 530 flow [2023-08-30 05:02:42,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 259 transitions, 530 flow [2023-08-30 05:02:42,519 INFO L130 PetriNetUnfolder]: 19/259 cut-off events. [2023-08-30 05:02:42,519 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 05:02:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 259 events. 19/259 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 525 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-08-30 05:02:42,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 11136 [2023-08-30 05:02:55,264 INFO L134 LiptonReduction]: Checked pairs total: 10233 [2023-08-30 05:02:55,264 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-30 05:02:55,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:02:55,281 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;@13d06e72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:02:55,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 05:02:55,301 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:02:55,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:02:55,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:55,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:02:55,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:55,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 34072, now seen corresponding path program 1 times [2023-08-30 05:02:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:55,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043097738] [2023-08-30 05:02:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:02:55,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:55,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:55,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 05:02:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:02:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:02:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:55,592 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:02:55,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:02:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:55,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:02:55,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043097738] [2023-08-30 05:02:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043097738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:02:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:02:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:02:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115291475] [2023-08-30 05:02:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:02:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:02:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:55,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:02:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:02:55,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-30 05:02:55,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:55,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:55,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-30 05:02:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:55,919 INFO L130 PetriNetUnfolder]: 217/364 cut-off events. [2023-08-30 05:02:55,919 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 05:02:55,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 364 events. 217/364 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1270 event pairs, 168 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 640. Up to 364 conditions per place. [2023-08-30 05:02:55,923 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 29 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 05:02:55,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 132 flow [2023-08-30 05:02:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:02:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:02:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 05:02:55,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460260972716489 [2023-08-30 05:02:55,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 05:02:55,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 05:02:55,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:55,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 05:02:55,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:55,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:55,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:55,961 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 752 transitions. [2023-08-30 05:02:55,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 132 flow [2023-08-30 05:02:55,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:02:55,967 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 66 flow [2023-08-30 05:02:55,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 05:02:55,972 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-08-30 05:02:55,972 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 66 flow [2023-08-30 05:02:55,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:55,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:55,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:02:55,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 05:02:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:56,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:56,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash 34175, now seen corresponding path program 1 times [2023-08-30 05:02:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243042854] [2023-08-30 05:02:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:02:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:56,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 05:02:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:02:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:02:56,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:56,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:02:56,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243042854] [2023-08-30 05:02:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243042854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:02:56,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:02:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:02:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240363006] [2023-08-30 05:02:56,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:02:56,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:02:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:02:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:02:56,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 562 [2023-08-30 05:02:56,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:56,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 562 [2023-08-30 05:02:56,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:56,428 INFO L130 PetriNetUnfolder]: 217/366 cut-off events. [2023-08-30 05:02:56,429 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:02:56,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 366 events. 217/366 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1260 event pairs, 168 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 736. Up to 365 conditions per place. [2023-08-30 05:02:56,431 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 30 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-30 05:02:56,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 134 flow [2023-08-30 05:02:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:02:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:02:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-08-30 05:02:56,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513641755634638 [2023-08-30 05:02:56,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-08-30 05:02:56,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-08-30 05:02:56,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:56,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-08-30 05:02:56,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,441 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 66 flow. Second operand 3 states and 761 transitions. [2023-08-30 05:02:56,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 134 flow [2023-08-30 05:02:56,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:02:56,442 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 81 flow [2023-08-30 05:02:56,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-30 05:02:56,443 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-30 05:02:56,444 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 81 flow [2023-08-30 05:02:56,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:56,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:02:56,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:56,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:56,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 34073, now seen corresponding path program 1 times [2023-08-30 05:02:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:56,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880312443] [2023-08-30 05:02:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:02:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:56,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 05:02:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:02:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:02:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:56,748 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:02:56,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:02:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:56,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:02:56,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:56,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880312443] [2023-08-30 05:02:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880312443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:02:56,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:02:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:02:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839529958] [2023-08-30 05:02:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:02:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:02:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:02:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:02:56,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 562 [2023-08-30 05:02:56,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:56,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 562 [2023-08-30 05:02:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:56,956 INFO L130 PetriNetUnfolder]: 217/365 cut-off events. [2023-08-30 05:02:56,956 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 05:02:56,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 365 events. 217/365 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1258 event pairs, 168 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 740. Up to 365 conditions per place. [2023-08-30 05:02:56,958 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-30 05:02:56,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 143 flow [2023-08-30 05:02:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:02:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:02:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-30 05:02:56,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442467378410439 [2023-08-30 05:02:56,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-30 05:02:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-30 05:02:56,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:56,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-30 05:02:56,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,966 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 81 flow. Second operand 3 states and 749 transitions. [2023-08-30 05:02:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 143 flow [2023-08-30 05:02:56,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 05:02:56,967 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 85 flow [2023-08-30 05:02:56,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 05:02:56,968 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-30 05:02:56,968 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 85 flow [2023-08-30 05:02:56,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:56,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:56,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:02:56,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:57,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:57,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:57,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1059398, now seen corresponding path program 1 times [2023-08-30 05:02:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:57,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199436902] [2023-08-30 05:02:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:02:57,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:57,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:57,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 05:02:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:02:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:02:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:57,265 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:02:57,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:02:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:57,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:02:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:57,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:57,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199436902] [2023-08-30 05:02:57,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199436902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:02:57,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:02:57,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:02:57,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816248399] [2023-08-30 05:02:57,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:02:57,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:02:57,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:57,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:02:57,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:02:57,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-30 05:02:57,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:57,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:57,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-30 05:02:57,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:58,235 INFO L130 PetriNetUnfolder]: 649/1089 cut-off events. [2023-08-30 05:02:58,236 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 05:02:58,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1089 events. 649/1089 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5071 event pairs, 504 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2209. Up to 365 conditions per place. [2023-08-30 05:02:58,242 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 83 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-30 05:02:58,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 87 transitions, 395 flow [2023-08-30 05:02:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:02:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:02:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1274 transitions. [2023-08-30 05:02:58,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533807829181495 [2023-08-30 05:02:58,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1274 transitions. [2023-08-30 05:02:58,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1274 transitions. [2023-08-30 05:02:58,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:58,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1274 transitions. [2023-08-30 05:02:58,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.8) internal successors, (1274), 5 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,254 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 85 flow. Second operand 5 states and 1274 transitions. [2023-08-30 05:02:58,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 87 transitions, 395 flow [2023-08-30 05:02:58,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 87 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:02:58,257 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 107 flow [2023-08-30 05:02:58,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-30 05:02:58,258 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-08-30 05:02:58,258 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 107 flow [2023-08-30 05:02:58,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:58,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:02:58,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:58,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:58,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:58,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1059500, now seen corresponding path program 1 times [2023-08-30 05:02:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:58,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067381801] [2023-08-30 05:02:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:02:58,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:58,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:58,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 05:02:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:02:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:02:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:58,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:02:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:58,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:58,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067381801] [2023-08-30 05:02:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067381801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:02:58,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:02:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:02:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750538791] [2023-08-30 05:02:58,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:02:58,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:02:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:02:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:02:58,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-30 05:02:58,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:58,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-30 05:02:58,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:58,849 INFO L130 PetriNetUnfolder]: 217/367 cut-off events. [2023-08-30 05:02:58,850 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 05:02:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 367 events. 217/367 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1263 event pairs, 168 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 754. Up to 364 conditions per place. [2023-08-30 05:02:58,851 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 05:02:58,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-08-30 05:02:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:02:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:02:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1239 transitions. [2023-08-30 05:02:58,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409252669039146 [2023-08-30 05:02:58,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1239 transitions. [2023-08-30 05:02:58,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1239 transitions. [2023-08-30 05:02:58,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:58,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1239 transitions. [2023-08-30 05:02:58,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.8) internal successors, (1239), 5 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,862 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,862 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 107 flow. Second operand 5 states and 1239 transitions. [2023-08-30 05:02:58,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-08-30 05:02:58,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 163 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 05:02:58,864 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 124 flow [2023-08-30 05:02:58,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2023-08-30 05:02:58,866 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-30 05:02:58,866 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 124 flow [2023-08-30 05:02:58,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:58,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:58,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-30 05:02:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:59,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:59,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181798, now seen corresponding path program 2 times [2023-08-30 05:02:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115271320] [2023-08-30 05:02:59,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:02:59,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:59,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:59,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:59,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 05:02:59,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:02:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:02:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:02:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:59,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:02:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:02:59,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:59,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115271320] [2023-08-30 05:02:59,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115271320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:02:59,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:02:59,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:02:59,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130282844] [2023-08-30 05:02:59,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:02:59,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:02:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:02:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:02:59,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-30 05:02:59,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:59,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:59,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-30 05:02:59,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:59,691 INFO L130 PetriNetUnfolder]: 216/365 cut-off events. [2023-08-30 05:02:59,691 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 05:02:59,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 365 events. 216/365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1254 event pairs, 168 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 752. Up to 362 conditions per place. [2023-08-30 05:02:59,694 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-30 05:02:59,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2023-08-30 05:02:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:02:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:02:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1473 transitions. [2023-08-30 05:02:59,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43683274021352314 [2023-08-30 05:02:59,698 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1473 transitions. [2023-08-30 05:02:59,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1473 transitions. [2023-08-30 05:02:59,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:59,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1473 transitions. [2023-08-30 05:02:59,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 245.5) internal successors, (1473), 6 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:59,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:59,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:59,708 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 124 flow. Second operand 6 states and 1473 transitions. [2023-08-30 05:02:59,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2023-08-30 05:02:59,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 153 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 05:02:59,710 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 99 flow [2023-08-30 05:02:59,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-30 05:02:59,712 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-30 05:02:59,712 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 99 flow [2023-08-30 05:02:59,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:59,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:59,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-30 05:02:59,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:59,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:02:59,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181900, now seen corresponding path program 2 times [2023-08-30 05:02:59,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:59,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259747009] [2023-08-30 05:02:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:02:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:59,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:59,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 05:02:59,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:02:59,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:02:59,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:02:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:03:00,070 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 05:03:00,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2023-08-30 05:03:00,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 05:03:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:00,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:00,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:00,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259747009] [2023-08-30 05:03:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259747009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:00,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:00,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:03:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882725441] [2023-08-30 05:03:00,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:03:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:03:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:03:00,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 562 [2023-08-30 05:03:00,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:00,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 562 [2023-08-30 05:03:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:00,472 INFO L130 PetriNetUnfolder]: 166/289 cut-off events. [2023-08-30 05:03:00,472 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:03:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 289 events. 166/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 936 event pairs, 128 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 593. Up to 289 conditions per place. [2023-08-30 05:03:00,474 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 05:03:00,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 147 flow [2023-08-30 05:03:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:03:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:03:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2023-08-30 05:03:00,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424673784104389 [2023-08-30 05:03:00,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2023-08-30 05:03:00,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2023-08-30 05:03:00,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:00,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2023-08-30 05:03:00,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,482 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 99 flow. Second operand 3 states and 746 transitions. [2023-08-30 05:03:00,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 147 flow [2023-08-30 05:03:00,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:03:00,484 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 84 flow [2023-08-30 05:03:00,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-30 05:03:00,485 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-08-30 05:03:00,485 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 84 flow [2023-08-30 05:03:00,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:00,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2023-08-30 05:03:00,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:00,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:00,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:00,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1018181902, now seen corresponding path program 1 times [2023-08-30 05:03:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:00,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498052859] [2023-08-30 05:03:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:00,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:00,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 05:03:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:03:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:00,835 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:03:00,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 05:03:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:00,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:00,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498052859] [2023-08-30 05:03:00,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498052859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:00,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:00,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:03:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482285160] [2023-08-30 05:03:00,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:03:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:03:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:03:01,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-30 05:03:01,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:01,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-30 05:03:01,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:01,122 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-08-30 05:03:01,122 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:03:01,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 213 events. 116/213 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 630 event pairs, 88 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 436. Up to 213 conditions per place. [2023-08-30 05:03:01,124 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-30 05:03:01,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 128 flow [2023-08-30 05:03:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:03:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:03:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-30 05:03:01,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430604982206406 [2023-08-30 05:03:01,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-30 05:03:01,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-30 05:03:01,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:01,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-30 05:03:01,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,139 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 84 flow. Second operand 3 states and 747 transitions. [2023-08-30 05:03:01,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 128 flow [2023-08-30 05:03:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:03:01,141 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 75 flow [2023-08-30 05:03:01,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-30 05:03:01,141 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-30 05:03:01,141 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 75 flow [2023-08-30 05:03:01,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:01,142 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-08-30 05:03:01,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,353 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:01,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -779712712, now seen corresponding path program 1 times [2023-08-30 05:03:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758387980] [2023-08-30 05:03:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:01,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:01,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 05:03:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:01,478 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:03:01,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 05:03:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:01,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:01,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:01,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758387980] [2023-08-30 05:03:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758387980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:01,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:01,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:03:01,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377603275] [2023-08-30 05:03:01,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:01,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:03:01,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:03:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:03:01,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 562 [2023-08-30 05:03:01,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:01,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 562 [2023-08-30 05:03:01,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:01,661 INFO L130 PetriNetUnfolder]: 106/193 cut-off events. [2023-08-30 05:03:01,661 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:03:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 193 events. 106/193 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 563 event pairs, 80 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 396. Up to 193 conditions per place. [2023-08-30 05:03:01,663 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 05:03:01,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 25 transitions, 121 flow [2023-08-30 05:03:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:03:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:03:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-08-30 05:03:01,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365361803084223 [2023-08-30 05:03:01,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-08-30 05:03:01,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-08-30 05:03:01,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:01,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-08-30 05:03:01,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,670 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 75 flow. Second operand 3 states and 736 transitions. [2023-08-30 05:03:01,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 25 transitions, 121 flow [2023-08-30 05:03:01,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:03:01,671 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-08-30 05:03:01,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-30 05:03:01,672 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-30 05:03:01,672 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-08-30 05:03:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2023-08-30 05:03:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:01,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -779712711, now seen corresponding path program 1 times [2023-08-30 05:03:01,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:01,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669932297] [2023-08-30 05:03:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:01,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:01,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 05:03:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:03:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:03:02,002 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 05:03:02,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 05:03:02,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 05:03:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:02,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:02,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:02,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669932297] [2023-08-30 05:03:02,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669932297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:02,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:02,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:03:02,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000310313] [2023-08-30 05:03:02,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:03:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:03:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:03:02,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 562 [2023-08-30 05:03:02,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:02,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 562 [2023-08-30 05:03:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:02,156 INFO L130 PetriNetUnfolder]: 96/173 cut-off events. [2023-08-30 05:03:02,156 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:03:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 173 events. 96/173 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 477 event pairs, 72 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 356. Up to 173 conditions per place. [2023-08-30 05:03:02,157 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-30 05:03:02,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 23 transitions, 114 flow [2023-08-30 05:03:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:03:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:03:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-30 05:03:02,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44068801897983395 [2023-08-30 05:03:02,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-30 05:03:02,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-30 05:03:02,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:02,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-30 05:03:02,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,162 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 72 flow. Second operand 3 states and 743 transitions. [2023-08-30 05:03:02,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 23 transitions, 114 flow [2023-08-30 05:03:02,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 23 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:03:02,163 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 69 flow [2023-08-30 05:03:02,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-30 05:03:02,164 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-30 05:03:02,164 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 69 flow [2023-08-30 05:03:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-08-30 05:03:02,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:02,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:02,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1598711344, now seen corresponding path program 1 times [2023-08-30 05:03:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029946015] [2023-08-30 05:03:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:02,374 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:02,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 05:03:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:03:02,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:02,494 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:03:02,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:03:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:02,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:02,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:02,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029946015] [2023-08-30 05:03:02,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029946015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:02,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:02,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:03:02,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528021648] [2023-08-30 05:03:02,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:02,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:02,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:02,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:02,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-30 05:03:02,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:02,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-30 05:03:02,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:02,825 INFO L130 PetriNetUnfolder]: 157/282 cut-off events. [2023-08-30 05:03:02,825 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:03:02,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 282 events. 157/282 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1025 event pairs, 72 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 577. Up to 169 conditions per place. [2023-08-30 05:03:02,827 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-30 05:03:02,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 178 flow [2023-08-30 05:03:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1207 transitions. [2023-08-30 05:03:02,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4295373665480427 [2023-08-30 05:03:02,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1207 transitions. [2023-08-30 05:03:02,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1207 transitions. [2023-08-30 05:03:02,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:02,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1207 transitions. [2023-08-30 05:03:02,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 241.4) internal successors, (1207), 5 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,845 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 69 flow. Second operand 5 states and 1207 transitions. [2023-08-30 05:03:02,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 178 flow [2023-08-30 05:03:02,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:03:02,847 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 84 flow [2023-08-30 05:03:02,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2023-08-30 05:03:02,847 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-30 05:03:02,847 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 84 flow [2023-08-30 05:03:02,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:02,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2023-08-30 05:03:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:03,057 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:03,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1598711343, now seen corresponding path program 1 times [2023-08-30 05:03:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380799535] [2023-08-30 05:03:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:03,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:03,059 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 05:03:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:03:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:03,156 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:03:03,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:03:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:03,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:03,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:03,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380799535] [2023-08-30 05:03:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380799535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:03,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:03,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:03:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378091192] [2023-08-30 05:03:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:03:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:03:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:03:03,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-30 05:03:03,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:03,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:03,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-30 05:03:03,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:03,359 INFO L130 PetriNetUnfolder]: 101/186 cut-off events. [2023-08-30 05:03:03,359 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-30 05:03:03,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 186 events. 101/186 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 525 event pairs, 75 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 434. Up to 182 conditions per place. [2023-08-30 05:03:03,360 INFO L137 encePairwiseOnDemand]: 558/562 looper letters, 20 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-08-30 05:03:03,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 22 transitions, 124 flow [2023-08-30 05:03:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:03:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:03:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 957 transitions. [2023-08-30 05:03:03,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42571174377224197 [2023-08-30 05:03:03,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 957 transitions. [2023-08-30 05:03:03,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 957 transitions. [2023-08-30 05:03:03,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:03,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 957 transitions. [2023-08-30 05:03:03,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:03,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:03,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 562.0) internal successors, (2810), 5 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:03,368 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 84 flow. Second operand 4 states and 957 transitions. [2023-08-30 05:03:03,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 22 transitions, 124 flow [2023-08-30 05:03:03,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 22 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:03,368 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 78 flow [2023-08-30 05:03:03,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2023-08-30 05:03:03,369 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-30 05:03:03,369 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 78 flow [2023-08-30 05:03:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.5) internal successors, (942), 4 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:03,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:03,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:03,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:03,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:03,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1979554837, now seen corresponding path program 1 times [2023-08-30 05:03:03,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:03,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551684385] [2023-08-30 05:03:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:03,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:03,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:03,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:03,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 05:03:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:03:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:03,693 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:03:03,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:03:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:03,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:03,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551684385] [2023-08-30 05:03:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551684385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:03,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:03:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558042757] [2023-08-30 05:03:03,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:03,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:03:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:03:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:03:05,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-30 05:03:05,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 78 flow. Second operand has 10 states, 10 states have (on average 234.4) internal successors, (2344), 10 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:05,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-30 05:03:05,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:05,361 INFO L130 PetriNetUnfolder]: 173/318 cut-off events. [2023-08-30 05:03:05,361 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 05:03:05,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 318 events. 173/318 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1231 event pairs, 45 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 712. Up to 116 conditions per place. [2023-08-30 05:03:05,362 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 54 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-08-30 05:03:05,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 287 flow [2023-08-30 05:03:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:03:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:03:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1691 transitions. [2023-08-30 05:03:05,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298423995932893 [2023-08-30 05:03:05,366 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1691 transitions. [2023-08-30 05:03:05,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1691 transitions. [2023-08-30 05:03:05,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:05,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1691 transitions. [2023-08-30 05:03:05,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 241.57142857142858) internal successors, (1691), 7 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,371 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,371 INFO L175 Difference]: Start difference. First operand has 36 places, 22 transitions, 78 flow. Second operand 7 states and 1691 transitions. [2023-08-30 05:03:05,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 287 flow [2023-08-30 05:03:05,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:03:05,373 INFO L231 Difference]: Finished difference. Result has 42 places, 24 transitions, 105 flow [2023-08-30 05:03:05,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2023-08-30 05:03:05,373 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 05:03:05,373 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 105 flow [2023-08-30 05:03:05,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.4) internal successors, (2344), 10 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:05,374 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:05,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:05,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:05,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:05,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1237466930, now seen corresponding path program 1 times [2023-08-30 05:03:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:05,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989226655] [2023-08-30 05:03:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:05,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:05,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:05,585 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:05,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 05:03:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:03:05,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:05,716 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:03:05,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:03:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:05,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:05,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:05,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989226655] [2023-08-30 05:03:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989226655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:05,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:05,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:03:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648116333] [2023-08-30 05:03:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:05,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:05,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 562 [2023-08-30 05:03:05,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:05,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:05,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 562 [2023-08-30 05:03:05,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:06,105 INFO L130 PetriNetUnfolder]: 249/458 cut-off events. [2023-08-30 05:03:06,106 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2023-08-30 05:03:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 458 events. 249/458 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1896 event pairs, 135 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1143. Up to 314 conditions per place. [2023-08-30 05:03:06,109 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 34 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-30 05:03:06,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 241 flow [2023-08-30 05:03:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1201 transitions. [2023-08-30 05:03:06,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274021352313167 [2023-08-30 05:03:06,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1201 transitions. [2023-08-30 05:03:06,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1201 transitions. [2023-08-30 05:03:06,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:06,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1201 transitions. [2023-08-30 05:03:06,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 240.2) internal successors, (1201), 5 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:06,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:06,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:06,119 INFO L175 Difference]: Start difference. First operand has 42 places, 24 transitions, 105 flow. Second operand 5 states and 1201 transitions. [2023-08-30 05:03:06,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 241 flow [2023-08-30 05:03:06,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 226 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:06,121 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 112 flow [2023-08-30 05:03:06,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-08-30 05:03:06,122 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2023-08-30 05:03:06,122 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 112 flow [2023-08-30 05:03:06,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:06,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:06,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-30 05:03:06,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:06,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:06,334 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:06,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 318347403, now seen corresponding path program 2 times [2023-08-30 05:03:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:06,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740360019] [2023-08-30 05:03:06,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:06,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:06,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:06,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 05:03:06,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:03:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:03:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:06,519 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:03:06,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:03:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:06,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:06,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740360019] [2023-08-30 05:03:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740360019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:06,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:06,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2023-08-30 05:03:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255105813] [2023-08-30 05:03:06,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:03:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:03:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:03:08,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-30 05:03:08,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 112 flow. Second operand has 12 states, 12 states have (on average 234.5) internal successors, (2814), 12 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:08,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:08,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-30 05:03:08,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:09,256 INFO L130 PetriNetUnfolder]: 215/410 cut-off events. [2023-08-30 05:03:09,256 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 05:03:09,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 410 events. 215/410 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1809 event pairs, 5 based on Foata normal form. 28/412 useless extension candidates. Maximal degree in co-relation 1065. Up to 96 conditions per place. [2023-08-30 05:03:09,258 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 64 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2023-08-30 05:03:09,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 382 flow [2023-08-30 05:03:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:03:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:03:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1929 transitions. [2023-08-30 05:03:09,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290480427046263 [2023-08-30 05:03:09,262 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1929 transitions. [2023-08-30 05:03:09,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1929 transitions. [2023-08-30 05:03:09,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:09,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1929 transitions. [2023-08-30 05:03:09,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 241.125) internal successors, (1929), 8 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,269 INFO L175 Difference]: Start difference. First operand has 44 places, 25 transitions, 112 flow. Second operand 8 states and 1929 transitions. [2023-08-30 05:03:09,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 382 flow [2023-08-30 05:03:09,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 359 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 05:03:09,270 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 95 flow [2023-08-30 05:03:09,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2023-08-30 05:03:09,271 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-30 05:03:09,271 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 95 flow [2023-08-30 05:03:09,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 234.5) internal successors, (2814), 12 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:09,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:09,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:09,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:09,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:09,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 293231830, now seen corresponding path program 1 times [2023-08-30 05:03:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:09,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238211375] [2023-08-30 05:03:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:09,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:09,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 05:03:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:03:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:09,607 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 05:03:09,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 05:03:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:09,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:09,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:09,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238211375] [2023-08-30 05:03:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238211375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:09,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:09,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 05:03:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009150242] [2023-08-30 05:03:09,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:03:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:03:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:03:10,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 562 [2023-08-30 05:03:10,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 95 flow. Second operand has 10 states, 10 states have (on average 234.8) internal successors, (2348), 10 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:10,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:10,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 562 [2023-08-30 05:03:10,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:11,293 INFO L130 PetriNetUnfolder]: 347/662 cut-off events. [2023-08-30 05:03:11,293 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-30 05:03:11,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 662 events. 347/662 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3101 event pairs, 123 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 1650. Up to 280 conditions per place. [2023-08-30 05:03:11,296 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2023-08-30 05:03:11,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 333 flow [2023-08-30 05:03:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:03:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:03:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1681 transitions. [2023-08-30 05:03:11,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42730045754956786 [2023-08-30 05:03:11,299 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1681 transitions. [2023-08-30 05:03:11,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1681 transitions. [2023-08-30 05:03:11,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:11,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1681 transitions. [2023-08-30 05:03:11,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 240.14285714285714) internal successors, (1681), 7 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:11,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:11,306 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 562.0) internal successors, (4496), 8 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:11,306 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 95 flow. Second operand 7 states and 1681 transitions. [2023-08-30 05:03:11,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 333 flow [2023-08-30 05:03:11,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 301 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:03:11,307 INFO L231 Difference]: Finished difference. Result has 45 places, 25 transitions, 114 flow [2023-08-30 05:03:11,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=25} [2023-08-30 05:03:11,308 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-30 05:03:11,308 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 25 transitions, 114 flow [2023-08-30 05:03:11,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.8) internal successors, (2348), 10 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:11,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:11,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:11,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:11,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:11,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:11,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1672021034, now seen corresponding path program 2 times [2023-08-30 05:03:11,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893212940] [2023-08-30 05:03:11,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:11,518 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 05:03:11,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:03:11,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:11,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:11,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:11,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893212940] [2023-08-30 05:03:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893212940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:11,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:11,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:03:11,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106063006] [2023-08-30 05:03:11,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:03:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:03:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:03:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 562 [2023-08-30 05:03:11,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 25 transitions, 114 flow. Second operand has 10 states, 10 states have (on average 243.6) internal successors, (2436), 10 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:11,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:11,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 562 [2023-08-30 05:03:11,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:12,185 INFO L130 PetriNetUnfolder]: 288/577 cut-off events. [2023-08-30 05:03:12,185 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-08-30 05:03:12,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 577 events. 288/577 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2729 event pairs, 24 based on Foata normal form. 52/629 useless extension candidates. Maximal degree in co-relation 1510. Up to 126 conditions per place. [2023-08-30 05:03:12,187 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 60 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-30 05:03:12,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 345 flow [2023-08-30 05:03:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:03:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:03:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1506 transitions. [2023-08-30 05:03:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661921708185054 [2023-08-30 05:03:12,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1506 transitions. [2023-08-30 05:03:12,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1506 transitions. [2023-08-30 05:03:12,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:12,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1506 transitions. [2023-08-30 05:03:12,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,195 INFO L175 Difference]: Start difference. First operand has 45 places, 25 transitions, 114 flow. Second operand 6 states and 1506 transitions. [2023-08-30 05:03:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 345 flow [2023-08-30 05:03:12,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 327 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 05:03:12,198 INFO L231 Difference]: Finished difference. Result has 42 places, 23 transitions, 90 flow [2023-08-30 05:03:12,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=23} [2023-08-30 05:03:12,198 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 05:03:12,199 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 23 transitions, 90 flow [2023-08-30 05:03:12,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 243.6) internal successors, (2436), 10 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:12,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:12,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:12,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:12,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1958708757, now seen corresponding path program 1 times [2023-08-30 05:03:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805776310] [2023-08-30 05:03:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:12,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:12,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:12,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 05:03:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:03:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:12,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:12,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:12,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805776310] [2023-08-30 05:03:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805776310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:12,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692076633] [2023-08-30 05:03:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:03:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:03:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:03:12,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 05:03:12,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 23 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:12,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 05:03:12,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:13,088 INFO L130 PetriNetUnfolder]: 290/588 cut-off events. [2023-08-30 05:03:13,089 INFO L131 PetriNetUnfolder]: For 208/208 co-relation queries the response was YES. [2023-08-30 05:03:13,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 588 events. 290/588 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2837 event pairs, 218 based on Foata normal form. 5/593 useless extension candidates. Maximal degree in co-relation 1453. Up to 442 conditions per place. [2023-08-30 05:03:13,091 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 38 selfloop transitions, 3 changer transitions 8/49 dead transitions. [2023-08-30 05:03:13,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 274 flow [2023-08-30 05:03:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2023-08-30 05:03:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40640569395017795 [2023-08-30 05:03:13,094 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2023-08-30 05:03:13,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2023-08-30 05:03:13,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:13,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2023-08-30 05:03:13,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,099 INFO L175 Difference]: Start difference. First operand has 42 places, 23 transitions, 90 flow. Second operand 5 states and 1142 transitions. [2023-08-30 05:03:13,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 274 flow [2023-08-30 05:03:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 253 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:03:13,100 INFO L231 Difference]: Finished difference. Result has 45 places, 24 transitions, 103 flow [2023-08-30 05:03:13,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=45, PETRI_TRANSITIONS=24} [2023-08-30 05:03:13,101 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-08-30 05:03:13,101 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 24 transitions, 103 flow [2023-08-30 05:03:13,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:13,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:13,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:13,313 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:13,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1017445191, now seen corresponding path program 2 times [2023-08-30 05:03:13,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:13,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124318568] [2023-08-30 05:03:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:13,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:13,315 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:13,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 05:03:13,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:03:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:03:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:13,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:13,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124318568] [2023-08-30 05:03:13,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124318568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:13,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:13,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:13,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349511381] [2023-08-30 05:03:13,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:13,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:03:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:03:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:03:13,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 562 [2023-08-30 05:03:13,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 24 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:13,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 562 [2023-08-30 05:03:13,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:13,956 INFO L130 PetriNetUnfolder]: 284/580 cut-off events. [2023-08-30 05:03:13,956 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2023-08-30 05:03:13,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 580 events. 284/580 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2748 event pairs, 218 based on Foata normal form. 3/583 useless extension candidates. Maximal degree in co-relation 1583. Up to 452 conditions per place. [2023-08-30 05:03:13,958 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 41 selfloop transitions, 3 changer transitions 6/50 dead transitions. [2023-08-30 05:03:13,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 304 flow [2023-08-30 05:03:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1140 transitions. [2023-08-30 05:03:13,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40569395017793597 [2023-08-30 05:03:13,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1140 transitions. [2023-08-30 05:03:13,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1140 transitions. [2023-08-30 05:03:13,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:13,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1140 transitions. [2023-08-30 05:03:13,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,965 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,965 INFO L175 Difference]: Start difference. First operand has 45 places, 24 transitions, 103 flow. Second operand 5 states and 1140 transitions. [2023-08-30 05:03:13,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 304 flow [2023-08-30 05:03:13,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 280 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:13,967 INFO L231 Difference]: Finished difference. Result has 48 places, 25 transitions, 113 flow [2023-08-30 05:03:13,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=25} [2023-08-30 05:03:13,967 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-08-30 05:03:13,967 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 25 transitions, 113 flow [2023-08-30 05:03:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 222.5) internal successors, (1335), 6 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:13,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:13,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:13,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:14,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:14,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1129783765, now seen corresponding path program 3 times [2023-08-30 05:03:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:14,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841227160] [2023-08-30 05:03:14,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:14,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:14,177 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:14,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 05:03:14,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 05:03:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:03:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:14,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:14,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841227160] [2023-08-30 05:03:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841227160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:14,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:14,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135411720] [2023-08-30 05:03:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:03:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:03:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:03:14,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-30 05:03:14,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:14,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:14,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-30 05:03:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:14,957 INFO L130 PetriNetUnfolder]: 294/596 cut-off events. [2023-08-30 05:03:14,957 INFO L131 PetriNetUnfolder]: For 515/515 co-relation queries the response was YES. [2023-08-30 05:03:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 596 events. 294/596 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2878 event pairs, 220 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1799. Up to 446 conditions per place. [2023-08-30 05:03:14,960 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 37 selfloop transitions, 5 changer transitions 6/48 dead transitions. [2023-08-30 05:03:14,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 303 flow [2023-08-30 05:03:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1136 transitions. [2023-08-30 05:03:14,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40427046263345195 [2023-08-30 05:03:14,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1136 transitions. [2023-08-30 05:03:14,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1136 transitions. [2023-08-30 05:03:14,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:14,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1136 transitions. [2023-08-30 05:03:14,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:14,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:14,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:14,966 INFO L175 Difference]: Start difference. First operand has 48 places, 25 transitions, 113 flow. Second operand 5 states and 1136 transitions. [2023-08-30 05:03:14,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 303 flow [2023-08-30 05:03:14,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 279 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:14,967 INFO L231 Difference]: Finished difference. Result has 51 places, 28 transitions, 142 flow [2023-08-30 05:03:14,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=28} [2023-08-30 05:03:14,968 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-08-30 05:03:14,968 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 28 transitions, 142 flow [2023-08-30 05:03:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:14,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:14,969 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:14,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:15,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:15,176 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:15,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2082528333, now seen corresponding path program 4 times [2023-08-30 05:03:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951075013] [2023-08-30 05:03:15,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:03:15,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:15,178 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:15,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 05:03:15,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:03:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 05:03:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:15,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:15,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:15,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951075013] [2023-08-30 05:03:15,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951075013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:15,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024957113] [2023-08-30 05:03:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:03:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:03:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:03:16,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 562 [2023-08-30 05:03:16,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 28 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:16,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:16,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 562 [2023-08-30 05:03:16,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:17,296 INFO L130 PetriNetUnfolder]: 286/578 cut-off events. [2023-08-30 05:03:17,297 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2023-08-30 05:03:17,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 578 events. 286/578 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2718 event pairs, 216 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1804. Up to 454 conditions per place. [2023-08-30 05:03:17,300 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 36 selfloop transitions, 9 changer transitions 7/52 dead transitions. [2023-08-30 05:03:17,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 348 flow [2023-08-30 05:03:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:03:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:03:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1358 transitions. [2023-08-30 05:03:17,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027283511269276 [2023-08-30 05:03:17,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1358 transitions. [2023-08-30 05:03:17,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1358 transitions. [2023-08-30 05:03:17,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:17,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1358 transitions. [2023-08-30 05:03:17,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:17,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:17,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:17,306 INFO L175 Difference]: Start difference. First operand has 51 places, 28 transitions, 142 flow. Second operand 6 states and 1358 transitions. [2023-08-30 05:03:17,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 348 flow [2023-08-30 05:03:17,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 331 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 05:03:17,308 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 208 flow [2023-08-30 05:03:17,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-30 05:03:17,309 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-08-30 05:03:17,309 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 208 flow [2023-08-30 05:03:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:17,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:17,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:17,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:17,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:17,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1185530400, now seen corresponding path program 1 times [2023-08-30 05:03:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135470291] [2023-08-30 05:03:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:17,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:17,520 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:17,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 05:03:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:17,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:17,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135470291] [2023-08-30 05:03:17,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135470291] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:03:17,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:03:17,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-30 05:03:17,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385874515] [2023-08-30 05:03:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:03:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-30 05:03:18,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:18,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:18,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-30 05:03:18,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:18,387 INFO L130 PetriNetUnfolder]: 302/605 cut-off events. [2023-08-30 05:03:18,387 INFO L131 PetriNetUnfolder]: For 899/899 co-relation queries the response was YES. [2023-08-30 05:03:18,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 605 events. 302/605 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3050 event pairs, 8 based on Foata normal form. 18/623 useless extension candidates. Maximal degree in co-relation 2052. Up to 410 conditions per place. [2023-08-30 05:03:18,401 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 7 changer transitions 1/60 dead transitions. [2023-08-30 05:03:18,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 442 flow [2023-08-30 05:03:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1187 transitions. [2023-08-30 05:03:18,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224199288256228 [2023-08-30 05:03:18,404 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1187 transitions. [2023-08-30 05:03:18,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1187 transitions. [2023-08-30 05:03:18,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:18,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1187 transitions. [2023-08-30 05:03:18,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.4) internal successors, (1187), 5 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:18,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:18,407 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:18,407 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 208 flow. Second operand 5 states and 1187 transitions. [2023-08-30 05:03:18,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 442 flow [2023-08-30 05:03:18,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 419 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 05:03:18,410 INFO L231 Difference]: Finished difference. Result has 60 places, 35 transitions, 232 flow [2023-08-30 05:03:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2023-08-30 05:03:18,410 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-30 05:03:18,410 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 232 flow [2023-08-30 05:03:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:18,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:18,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:18,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:18,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:18,619 INFO L85 PathProgramCache]: Analyzing trace with hash 629436663, now seen corresponding path program 1 times [2023-08-30 05:03:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637710066] [2023-08-30 05:03:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:18,621 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:18,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 05:03:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:18,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:18,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:18,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:18,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637710066] [2023-08-30 05:03:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637710066] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:03:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:03:18,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-30 05:03:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526969596] [2023-08-30 05:03:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:03:19,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-30 05:03:19,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 35 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:19,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-30 05:03:19,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:19,408 INFO L130 PetriNetUnfolder]: 318/633 cut-off events. [2023-08-30 05:03:19,408 INFO L131 PetriNetUnfolder]: For 1336/1336 co-relation queries the response was YES. [2023-08-30 05:03:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 633 events. 318/633 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3041 event pairs, 62 based on Foata normal form. 12/645 useless extension candidates. Maximal degree in co-relation 2221. Up to 398 conditions per place. [2023-08-30 05:03:19,411 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 46 selfloop transitions, 10 changer transitions 1/57 dead transitions. [2023-08-30 05:03:19,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 443 flow [2023-08-30 05:03:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2023-08-30 05:03:19,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209964412811388 [2023-08-30 05:03:19,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2023-08-30 05:03:19,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2023-08-30 05:03:19,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:19,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2023-08-30 05:03:19,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,416 INFO L175 Difference]: Start difference. First operand has 60 places, 35 transitions, 232 flow. Second operand 5 states and 1183 transitions. [2023-08-30 05:03:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 443 flow [2023-08-30 05:03:19,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 428 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 05:03:19,418 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 273 flow [2023-08-30 05:03:19,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2023-08-30 05:03:19,419 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2023-08-30 05:03:19,419 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 273 flow [2023-08-30 05:03:19,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:19,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:19,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:19,627 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:19,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1580113726, now seen corresponding path program 2 times [2023-08-30 05:03:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:19,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813696531] [2023-08-30 05:03:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:19,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:19,629 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:19,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 05:03:19,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:03:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:19,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:19,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813696531] [2023-08-30 05:03:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813696531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:19,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497784012] [2023-08-30 05:03:19,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:19,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:19,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 05:03:19,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:19,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 05:03:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:20,248 INFO L130 PetriNetUnfolder]: 316/631 cut-off events. [2023-08-30 05:03:20,248 INFO L131 PetriNetUnfolder]: For 1747/1747 co-relation queries the response was YES. [2023-08-30 05:03:20,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 631 events. 316/631 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2986 event pairs, 212 based on Foata normal form. 2/633 useless extension candidates. Maximal degree in co-relation 2309. Up to 494 conditions per place. [2023-08-30 05:03:20,251 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 39 selfloop transitions, 9 changer transitions 2/50 dead transitions. [2023-08-30 05:03:20,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 418 flow [2023-08-30 05:03:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1170 transitions. [2023-08-30 05:03:20,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41637010676156583 [2023-08-30 05:03:20,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1170 transitions. [2023-08-30 05:03:20,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1170 transitions. [2023-08-30 05:03:20,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:20,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1170 transitions. [2023-08-30 05:03:20,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,257 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 273 flow. Second operand 5 states and 1170 transitions. [2023-08-30 05:03:20,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 418 flow [2023-08-30 05:03:20,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 50 transitions, 403 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 05:03:20,260 INFO L231 Difference]: Finished difference. Result has 67 places, 37 transitions, 281 flow [2023-08-30 05:03:20,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=67, PETRI_TRANSITIONS=37} [2023-08-30 05:03:20,261 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2023-08-30 05:03:20,261 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 37 transitions, 281 flow [2023-08-30 05:03:20,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:20,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:20,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:20,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:20,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:20,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash 531031767, now seen corresponding path program 2 times [2023-08-30 05:03:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840169390] [2023-08-30 05:03:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:20,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:20,477 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:03:20,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:03:20,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:20,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:20,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:20,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840169390] [2023-08-30 05:03:20,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840169390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:20,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:20,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:20,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942308151] [2023-08-30 05:03:20,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:20,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:20,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:20,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 05:03:20,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 37 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:20,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 05:03:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:21,046 INFO L130 PetriNetUnfolder]: 331/656 cut-off events. [2023-08-30 05:03:21,047 INFO L131 PetriNetUnfolder]: For 2016/2016 co-relation queries the response was YES. [2023-08-30 05:03:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2491 conditions, 656 events. 331/656 cut-off events. For 2016/2016 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3119 event pairs, 228 based on Foata normal form. 12/668 useless extension candidates. Maximal degree in co-relation 2463. Up to 506 conditions per place. [2023-08-30 05:03:21,049 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2023-08-30 05:03:21,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 445 flow [2023-08-30 05:03:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1172 transitions. [2023-08-30 05:03:21,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170818505338078 [2023-08-30 05:03:21,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1172 transitions. [2023-08-30 05:03:21,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1172 transitions. [2023-08-30 05:03:21,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:21,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1172 transitions. [2023-08-30 05:03:21,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:21,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:21,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:21,060 INFO L175 Difference]: Start difference. First operand has 67 places, 37 transitions, 281 flow. Second operand 5 states and 1172 transitions. [2023-08-30 05:03:21,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 445 flow [2023-08-30 05:03:21,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 53 transitions, 425 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:21,063 INFO L231 Difference]: Finished difference. Result has 68 places, 38 transitions, 298 flow [2023-08-30 05:03:21,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=68, PETRI_TRANSITIONS=38} [2023-08-30 05:03:21,064 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2023-08-30 05:03:21,064 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 38 transitions, 298 flow [2023-08-30 05:03:21,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:21,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:21,065 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:21,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:21,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:21,273 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:21,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash 740690042, now seen corresponding path program 3 times [2023-08-30 05:03:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277565308] [2023-08-30 05:03:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:21,275 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:21,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:03:21,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 05:03:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:21,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:21,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:21,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277565308] [2023-08-30 05:03:21,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277565308] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:03:21,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:03:21,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-30 05:03:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714690926] [2023-08-30 05:03:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:03:21,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 562 [2023-08-30 05:03:21,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 38 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:21,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:21,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 562 [2023-08-30 05:03:21,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:22,312 INFO L130 PetriNetUnfolder]: 367/722 cut-off events. [2023-08-30 05:03:22,312 INFO L131 PetriNetUnfolder]: For 2494/2494 co-relation queries the response was YES. [2023-08-30 05:03:22,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 722 events. 367/722 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3562 event pairs, 140 based on Foata normal form. 18/740 useless extension candidates. Maximal degree in co-relation 2789. Up to 608 conditions per place. [2023-08-30 05:03:22,317 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 47 selfloop transitions, 12 changer transitions 1/60 dead transitions. [2023-08-30 05:03:22,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 522 flow [2023-08-30 05:03:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1181 transitions. [2023-08-30 05:03:22,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202846975088968 [2023-08-30 05:03:22,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1181 transitions. [2023-08-30 05:03:22,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1181 transitions. [2023-08-30 05:03:22,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:22,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1181 transitions. [2023-08-30 05:03:22,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.2) internal successors, (1181), 5 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:22,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:22,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:22,322 INFO L175 Difference]: Start difference. First operand has 68 places, 38 transitions, 298 flow. Second operand 5 states and 1181 transitions. [2023-08-30 05:03:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 522 flow [2023-08-30 05:03:22,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 498 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:22,327 INFO L231 Difference]: Finished difference. Result has 71 places, 42 transitions, 348 flow [2023-08-30 05:03:22,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=71, PETRI_TRANSITIONS=42} [2023-08-30 05:03:22,327 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-08-30 05:03:22,327 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 42 transitions, 348 flow [2023-08-30 05:03:22,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.2) internal successors, (1161), 5 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:22,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:22,328 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:22,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:22,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:22,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash 686166957, now seen corresponding path program 3 times [2023-08-30 05:03:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:22,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209733144] [2023-08-30 05:03:22,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:22,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:22,530 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:22,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 05:03:22,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 05:03:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:22,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:22,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209733144] [2023-08-30 05:03:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209733144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:22,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366610361] [2023-08-30 05:03:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:22,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:22,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 05:03:22,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 42 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:22,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:22,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 05:03:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:23,118 INFO L130 PetriNetUnfolder]: 355/710 cut-off events. [2023-08-30 05:03:23,119 INFO L131 PetriNetUnfolder]: For 2683/2683 co-relation queries the response was YES. [2023-08-30 05:03:23,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 710 events. 355/710 cut-off events. For 2683/2683 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3522 event pairs, 200 based on Foata normal form. 12/722 useless extension candidates. Maximal degree in co-relation 2839. Up to 480 conditions per place. [2023-08-30 05:03:23,124 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 48 selfloop transitions, 13 changer transitions 1/62 dead transitions. [2023-08-30 05:03:23,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 62 transitions, 542 flow [2023-08-30 05:03:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1177 transitions. [2023-08-30 05:03:23,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188612099644128 [2023-08-30 05:03:23,126 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1177 transitions. [2023-08-30 05:03:23,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1177 transitions. [2023-08-30 05:03:23,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:23,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1177 transitions. [2023-08-30 05:03:23,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.4) internal successors, (1177), 5 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,131 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,131 INFO L175 Difference]: Start difference. First operand has 71 places, 42 transitions, 348 flow. Second operand 5 states and 1177 transitions. [2023-08-30 05:03:23,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 62 transitions, 542 flow [2023-08-30 05:03:23,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 05:03:23,149 INFO L231 Difference]: Finished difference. Result has 75 places, 42 transitions, 371 flow [2023-08-30 05:03:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=75, PETRI_TRANSITIONS=42} [2023-08-30 05:03:23,154 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 39 predicate places. [2023-08-30 05:03:23,154 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 42 transitions, 371 flow [2023-08-30 05:03:23,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:23,155 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:23,165 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 (28)] Ended with exit code 0 [2023-08-30 05:03:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:23,363 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:23,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1959877030, now seen corresponding path program 4 times [2023-08-30 05:03:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948670299] [2023-08-30 05:03:23,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:03:23,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:23,366 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:03:23,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:03:23,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:23,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:23,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948670299] [2023-08-30 05:03:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948670299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:23,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395457167] [2023-08-30 05:03:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 05:03:23,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 42 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:23,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 05:03:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:23,983 INFO L130 PetriNetUnfolder]: 330/655 cut-off events. [2023-08-30 05:03:23,983 INFO L131 PetriNetUnfolder]: For 2658/2658 co-relation queries the response was YES. [2023-08-30 05:03:23,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 655 events. 330/655 cut-off events. For 2658/2658 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3139 event pairs, 203 based on Foata normal form. 18/673 useless extension candidates. Maximal degree in co-relation 2676. Up to 537 conditions per place. [2023-08-30 05:03:23,989 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 1/58 dead transitions. [2023-08-30 05:03:23,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 555 flow [2023-08-30 05:03:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1173 transitions. [2023-08-30 05:03:23,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174377224199288 [2023-08-30 05:03:23,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1173 transitions. [2023-08-30 05:03:23,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1173 transitions. [2023-08-30 05:03:23,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:23,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1173 transitions. [2023-08-30 05:03:23,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.6) internal successors, (1173), 5 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:23,994 INFO L175 Difference]: Start difference. First operand has 75 places, 42 transitions, 371 flow. Second operand 5 states and 1173 transitions. [2023-08-30 05:03:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 555 flow [2023-08-30 05:03:24,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 521 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 05:03:24,008 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 362 flow [2023-08-30 05:03:24,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2023-08-30 05:03:24,009 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-30 05:03:24,009 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 362 flow [2023-08-30 05:03:24,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:24,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:24,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:24,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:24,217 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:24,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1132015867, now seen corresponding path program 4 times [2023-08-30 05:03:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:24,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072836200] [2023-08-30 05:03:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:03:24,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:24,219 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:24,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:03:24,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:03:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:24,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:24,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072836200] [2023-08-30 05:03:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072836200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:24,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:24,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:03:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302654359] [2023-08-30 05:03:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:24,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:24,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 562 [2023-08-30 05:03:24,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:24,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 562 [2023-08-30 05:03:24,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:24,785 INFO L130 PetriNetUnfolder]: 311/604 cut-off events. [2023-08-30 05:03:24,785 INFO L131 PetriNetUnfolder]: For 1987/1987 co-relation queries the response was YES. [2023-08-30 05:03:24,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 604 events. 311/604 cut-off events. For 1987/1987 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2740 event pairs, 187 based on Foata normal form. 4/608 useless extension candidates. Maximal degree in co-relation 2476. Up to 489 conditions per place. [2023-08-30 05:03:24,788 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 35 selfloop transitions, 12 changer transitions 4/51 dead transitions. [2023-08-30 05:03:24,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 51 transitions, 485 flow [2023-08-30 05:03:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1167 transitions. [2023-08-30 05:03:24,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41530249110320283 [2023-08-30 05:03:24,789 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1167 transitions. [2023-08-30 05:03:24,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1167 transitions. [2023-08-30 05:03:24,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:24,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1167 transitions. [2023-08-30 05:03:24,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.4) internal successors, (1167), 5 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,793 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 362 flow. Second operand 5 states and 1167 transitions. [2023-08-30 05:03:24,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 51 transitions, 485 flow [2023-08-30 05:03:24,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 439 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 05:03:24,796 INFO L231 Difference]: Finished difference. Result has 70 places, 40 transitions, 321 flow [2023-08-30 05:03:24,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=40} [2023-08-30 05:03:24,797 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-08-30 05:03:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 40 transitions, 321 flow [2023-08-30 05:03:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.2) internal successors, (1151), 5 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:24,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:24,797 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:24,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:25,005 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:03:25,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1028392938, now seen corresponding path program 1 times [2023-08-30 05:03:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:25,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072300544] [2023-08-30 05:03:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:03:25,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:25,007 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:25,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 05:03:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:03:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:03:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:25,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:03:25,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 524 treesize of output 194 [2023-08-30 05:03:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:03:28,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:31,658 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 05:03:31,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 928 treesize of output 394 [2023-08-30 05:09:00,669 WARN L222 SmtUtils]: Spent 5.40m on a formula simplification. DAG size of input: 412 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:09:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:09:00,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:09:00,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072300544] [2023-08-30 05:09:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072300544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:09:00,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:09:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:09:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096401580] [2023-08-30 05:09:00,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:09:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:09:00,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:09:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:09:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:09:07,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-30 05:09:07,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 40 transitions, 321 flow. Second operand has 14 states, 14 states have (on average 203.07142857142858) internal successors, (2843), 14 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:09:07,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:09:07,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-30 05:09:07,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:09:22,269 INFO L130 PetriNetUnfolder]: 375/733 cut-off events. [2023-08-30 05:09:22,269 INFO L131 PetriNetUnfolder]: For 1902/1902 co-relation queries the response was YES. [2023-08-30 05:09:22,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 733 events. 375/733 cut-off events. For 1902/1902 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3701 event pairs, 50 based on Foata normal form. 5/738 useless extension candidates. Maximal degree in co-relation 2843. Up to 287 conditions per place. [2023-08-30 05:09:22,273 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 67 selfloop transitions, 15 changer transitions 11/93 dead transitions. [2023-08-30 05:09:22,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 812 flow [2023-08-30 05:09:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:09:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:09:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1667 transitions. [2023-08-30 05:09:22,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707740213523132 [2023-08-30 05:09:22,276 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1667 transitions. [2023-08-30 05:09:22,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1667 transitions. [2023-08-30 05:09:22,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:09:22,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1667 transitions. [2023-08-30 05:09:22,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 208.375) internal successors, (1667), 8 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:09:22,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:09:22,280 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:09:22,280 INFO L175 Difference]: Start difference. First operand has 70 places, 40 transitions, 321 flow. Second operand 8 states and 1667 transitions. [2023-08-30 05:09:22,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 812 flow [2023-08-30 05:09:22,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 751 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:09:22,284 INFO L231 Difference]: Finished difference. Result has 74 places, 45 transitions, 368 flow [2023-08-30 05:09:22,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=74, PETRI_TRANSITIONS=45} [2023-08-30 05:09:22,285 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2023-08-30 05:09:22,285 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 45 transitions, 368 flow [2023-08-30 05:09:22,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 203.07142857142858) internal successors, (2843), 14 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:09:22,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:09:22,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:09:22,298 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 (31)] Forceful destruction successful, exit code 0 [2023-08-30 05:09:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:09:22,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 05:09:22,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:09:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1501316876, now seen corresponding path program 2 times [2023-08-30 05:09:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:09:22,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309611253] [2023-08-30 05:09:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:09:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:09:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:09:22,513 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:09:22,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 05:09:22,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:09:22,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:09:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:09:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:09:23,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:09:23,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 566 treesize of output 214 [2023-08-30 05:09:28,728 WARN L222 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 42 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:09:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:09:32,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:09:38,656 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-08-30 05:09:38,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 689 treesize of output 339 [2023-08-30 05:14:22,007 WARN L222 SmtUtils]: Spent 4.64m on a formula simplification. DAG size of input: 389 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:14:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 05:14:22,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:14:22,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309611253] [2023-08-30 05:14:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309611253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:14:22,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:14:22,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:14:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144754630] [2023-08-30 05:14:22,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:14:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:14:22,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:14:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:14:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:14:26,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 562 [2023-08-30 05:14:26,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 368 flow. Second operand has 14 states, 14 states have (on average 202.92857142857142) internal successors, (2841), 14 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:14:26,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:14:26,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 562 [2023-08-30 05:14:26,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:16:51,197 WARN L222 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 129 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15