./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:38:52,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:38:52,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:38:52,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:38:52,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:38:52,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:38:52,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:38:52,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:38:52,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:38:52,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:38:52,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:38:52,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:38:52,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:38:52,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:38:52,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:38:52,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:38:52,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:38:52,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:38:52,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:38:52,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:38:52,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:38:52,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:38:52,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:38:52,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:38:52,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:38:52,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:38:52,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:38:52,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:38:52,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:38:52,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:38:52,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:38:52,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:38:52,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:38:52,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:38:52,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:38:52,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:38:52,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:38:52,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:38:52,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:38:52,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:38:52,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:38:52,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:38:52,871 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:38:52,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:38:52,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:38:52,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:38:52,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:38:52,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:38:52,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:38:52,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:38:52,875 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:38:52,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:38:52,876 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:38:52,876 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:38:52,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:38:52,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:38:52,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:38:52,877 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:38:52,878 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:38:52,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:38:52,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:38:52,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:38:52,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:38:52,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:38:52,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:38:52,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:38:52,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:38:52,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:38:52,879 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:38:52,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:38:52,880 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:38:52,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:38:53,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:38:53,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:38:53,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:38:53,187 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:38:53,188 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:38:53,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 00:38:54,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:38:54,510 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:38:54,510 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 00:38:54,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c784d0883/4fe0c5d85af6420fbbc47f13d0ffdb9a/FLAGf7df2a625 [2023-08-30 00:38:54,531 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c784d0883/4fe0c5d85af6420fbbc47f13d0ffdb9a [2023-08-30 00:38:54,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:38:54,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:38:54,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:38:54,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:38:54,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:38:54,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:38:54" (1/1) ... [2023-08-30 00:38:54,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ee2d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:54, skipping insertion in model container [2023-08-30 00:38:54,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:38:54" (1/1) ... [2023-08-30 00:38:54,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:38:54,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:38:54,750 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 00:38:54,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:38:54,774 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 00:38:54,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37feb3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:54, skipping insertion in model container [2023-08-30 00:38:54,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:38:54,777 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 00:38:54,779 INFO L158 Benchmark]: Toolchain (without parser) took 243.89ms. Allocated memory is still 67.1MB. Free memory was 32.4MB in the beginning and 40.5MB in the end (delta: -8.1MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2023-08-30 00:38:54,779 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 44.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:38:54,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.16ms. Allocated memory is still 67.1MB. Free memory was 32.2MB in the beginning and 40.5MB in the end (delta: -8.3MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2023-08-30 00:38:54,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 44.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 242.16ms. Allocated memory is still 67.1MB. Free memory was 32.2MB in the beginning and 40.5MB in the end (delta: -8.3MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:38:56,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:38:56,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:38:56,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:38:56,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:38:56,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:38:56,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:38:56,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:38:56,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:38:56,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:38:56,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:38:56,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:38:56,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:38:56,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:38:56,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:38:56,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:38:56,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:38:56,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:38:56,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:38:56,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:38:56,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:38:56,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:38:56,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:38:56,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:38:56,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:38:56,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:38:56,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:38:56,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:38:56,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:38:56,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:38:56,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:38:56,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:38:56,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:38:56,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:38:56,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:38:56,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:38:56,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:38:56,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:38:56,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:38:56,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:38:56,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:38:56,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 00:38:56,514 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:38:56,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:38:56,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:38:56,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:38:56,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:38:56,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:38:56,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:38:56,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:38:56,518 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:38:56,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:38:56,519 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:38:56,519 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:38:56,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:38:56,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:38:56,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:38:56,520 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 00:38:56,521 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 00:38:56,521 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:38:56,521 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:38:56,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:38:56,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:38:56,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:38:56,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:38:56,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:38:56,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:38:56,522 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 00:38:56,522 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 00:38:56,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:38:56,523 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:38:56,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:38:56,523 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 00:38:56,523 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:38:56,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:38:56,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:38:56,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:38:56,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:38:56,839 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:38:56,840 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:38:56,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 00:38:58,030 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:38:58,215 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:38:58,216 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-30 00:38:58,221 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bc1059f/e59b43d729db46feaf78e15b99c7fc15/FLAG8a61ba4c6 [2023-08-30 00:38:58,232 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bc1059f/e59b43d729db46feaf78e15b99c7fc15 [2023-08-30 00:38:58,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:38:58,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:38:58,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:38:58,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:38:58,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:38:58,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540c5773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58, skipping insertion in model container [2023-08-30 00:38:58,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:38:58,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:38:58,432 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 00:38:58,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:38:58,467 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 00:38:58,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:38:58,494 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 00:38:58,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:38:58,501 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:38:58,518 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-30 00:38:58,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:38:58,533 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:38:58,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58 WrapperNode [2023-08-30 00:38:58,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:38:58,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:38:58,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:38:58,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:38:58,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,589 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-30 00:38:58,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:38:58,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:38:58,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:38:58,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:38:58,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:38:58,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:38:58,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:38:58,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:38:58,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (1/1) ... [2023-08-30 00:38:58,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:38:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:38:58,686 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 00:38:58,709 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 00:38:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:38:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 00:38:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:38:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 00:38:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:38:58,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:38:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:38:58,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:38:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:38:58,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:38:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 00:38:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:38:58,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:38:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:38:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 00:38:58,726 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 00:38:58,823 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:38:58,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:38:59,254 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:38:59,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:38:59,262 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 00:38:59,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:38:59 BoogieIcfgContainer [2023-08-30 00:38:59,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:38:59,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:38:59,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:38:59,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:38:59,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:38:58" (1/3) ... [2023-08-30 00:38:59,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544679d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:38:59, skipping insertion in model container [2023-08-30 00:38:59,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:38:58" (2/3) ... [2023-08-30 00:38:59,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544679d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:38:59, skipping insertion in model container [2023-08-30 00:38:59,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:38:59" (3/3) ... [2023-08-30 00:38:59,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-08-30 00:38:59,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:38:59,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-08-30 00:38:59,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:38:59,448 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:38:59,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 202 transitions, 428 flow [2023-08-30 00:38:59,584 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-08-30 00:38:59,589 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:38:59,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 15/199 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 00:38:59,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 202 transitions, 428 flow [2023-08-30 00:38:59,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 195 transitions, 408 flow [2023-08-30 00:38:59,604 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:38:59,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 195 transitions, 408 flow [2023-08-30 00:38:59,613 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 195 transitions, 408 flow [2023-08-30 00:38:59,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 195 transitions, 408 flow [2023-08-30 00:38:59,656 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-08-30 00:38:59,657 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:38:59,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 15/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-08-30 00:38:59,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2023-08-30 00:39:17,437 INFO L134 LiptonReduction]: Checked pairs total: 7687 [2023-08-30 00:39:17,437 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-08-30 00:39:17,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:39:17,453 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;@33b6f67b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:39:17,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-08-30 00:39:17,456 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 00:39:17,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:39:17,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:17,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:39:17,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:17,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 24835, now seen corresponding path program 1 times [2023-08-30 00:39:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:17,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158215034] [2023-08-30 00:39:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:17,471 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 00:39:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:17,477 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 00:39:17,487 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 00:39:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:39:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:17,720 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:39:17,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:39:17,756 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 00:39:17,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:17,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158215034] [2023-08-30 00:39:17,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158215034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:17,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:17,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537116538] [2023-08-30 00:39:17,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:17,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:17,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 00:39:17,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:17,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:17,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 00:39:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:19,052 INFO L130 PetriNetUnfolder]: 6860/8459 cut-off events. [2023-08-30 00:39:19,053 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 00:39:19,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 8459 events. 6860/8459 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35807 event pairs, 3109 based on Foata normal form. 0/2120 useless extension candidates. Maximal degree in co-relation 15308. Up to 8403 conditions per place. [2023-08-30 00:39:19,105 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 00:39:19,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 212 flow [2023-08-30 00:39:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-30 00:39:19,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247758761206194 [2023-08-30 00:39:19,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-30 00:39:19,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-30 00:39:19,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:19,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-30 00:39:19,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,135 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 592 transitions. [2023-08-30 00:39:19,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 212 flow [2023-08-30 00:39:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:39:19,142 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 108 flow [2023-08-30 00:39:19,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-30 00:39:19,146 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-30 00:39:19,147 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 108 flow [2023-08-30 00:39:19,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:19,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:39:19,157 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 00:39:19,356 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 00:39:19,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:19,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-08-30 00:39:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316242220] [2023-08-30 00:39:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:19,359 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 00:39:19,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:19,360 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 00:39:19,363 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 00:39:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:39:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:19,540 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:19,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:39:19,565 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 00:39:19,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:19,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:19,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316242220] [2023-08-30 00:39:19,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316242220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:19,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988038322] [2023-08-30 00:39:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:19,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 00:39:19,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:19,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:19,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 00:39:19,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:21,521 INFO L130 PetriNetUnfolder]: 13705/16902 cut-off events. [2023-08-30 00:39:21,522 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 00:39:21,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33809 conditions, 16902 events. 13705/16902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 77823 event pairs, 6215 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 33803. Up to 8401 conditions per place. [2023-08-30 00:39:21,616 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 90 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-30 00:39:21,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 388 flow [2023-08-30 00:39:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 00:39:21,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158924205378973 [2023-08-30 00:39:21,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 00:39:21,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 00:39:21,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:21,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 00:39:21,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:21,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:21,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:21,627 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 108 flow. Second operand 3 states and 633 transitions. [2023-08-30 00:39:21,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 388 flow [2023-08-30 00:39:21,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:39:21,631 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 119 flow [2023-08-30 00:39:21,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 00:39:21,632 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-08-30 00:39:21,632 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 119 flow [2023-08-30 00:39:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:21,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 00:39:21,645 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 00:39:21,842 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 00:39:21,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:21,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-08-30 00:39:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446548156] [2023-08-30 00:39:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:21,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:39:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:21,848 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 00:39:21,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 00:39:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:39:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:21,968 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 00:39:21,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:21,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446548156] [2023-08-30 00:39:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446548156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:21,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020758158] [2023-08-30 00:39:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:21,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:22,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 409 [2023-08-30 00:39:22,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:22,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:22,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 409 [2023-08-30 00:39:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:22,873 INFO L130 PetriNetUnfolder]: 6860/8460 cut-off events. [2023-08-30 00:39:22,873 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 00:39:22,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16931 conditions, 8460 events. 6860/8460 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35978 event pairs, 3109 based on Foata normal form. 1/2123 useless extension candidates. Maximal degree in co-relation 16923. Up to 8404 conditions per place. [2023-08-30 00:39:22,912 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 46 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-30 00:39:22,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 215 flow [2023-08-30 00:39:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-30 00:39:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655256723716384 [2023-08-30 00:39:22,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-30 00:39:22,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-30 00:39:22,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:22,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-30 00:39:22,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:22,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:22,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:22,921 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 119 flow. Second operand 3 states and 597 transitions. [2023-08-30 00:39:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 215 flow [2023-08-30 00:39:22,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 211 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 00:39:22,924 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 127 flow [2023-08-30 00:39:22,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-30 00:39:22,926 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-30 00:39:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 127 flow [2023-08-30 00:39:22,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:22,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:22,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:39:22,943 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 00:39:23,143 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 00:39:23,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:23,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash 772242, now seen corresponding path program 1 times [2023-08-30 00:39:23,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:23,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389158192] [2023-08-30 00:39:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:23,145 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 00:39:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:23,147 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 00:39:23,148 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 00:39:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:39:23,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:23,332 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 00:39:23,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 00:39:23,352 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:39:23,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:39:23,705 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 00:39:23,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:23,852 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 00:39:23,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389158192] [2023-08-30 00:39:23,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389158192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:23,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:23,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:39:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696011678] [2023-08-30 00:39:23,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:23,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:39:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:39:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:39:24,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 00:39:24,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:24,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:24,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 00:39:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:26,573 INFO L130 PetriNetUnfolder]: 12176/15084 cut-off events. [2023-08-30 00:39:26,573 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 00:39:26,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30196 conditions, 15084 events. 12176/15084 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 69218 event pairs, 5515 based on Foata normal form. 0/3897 useless extension candidates. Maximal degree in co-relation 30186. Up to 8389 conditions per place. [2023-08-30 00:39:26,635 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 89 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2023-08-30 00:39:26,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 461 flow [2023-08-30 00:39:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:39:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:39:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1301 transitions. [2023-08-30 00:39:26,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544184421935033 [2023-08-30 00:39:26,640 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1301 transitions. [2023-08-30 00:39:26,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1301 transitions. [2023-08-30 00:39:26,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:26,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1301 transitions. [2023-08-30 00:39:26,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.85714285714286) internal successors, (1301), 7 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:26,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:26,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:26,649 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 127 flow. Second operand 7 states and 1301 transitions. [2023-08-30 00:39:26,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 461 flow [2023-08-30 00:39:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:39:26,652 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 204 flow [2023-08-30 00:39:26,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-08-30 00:39:26,653 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-30 00:39:26,653 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 204 flow [2023-08-30 00:39:26,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:26,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:26,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:39:26,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 00:39:26,862 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 00:39:26,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:26,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash 772244, now seen corresponding path program 1 times [2023-08-30 00:39:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327508675] [2023-08-30 00:39:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:26,864 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 00:39:26,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:26,865 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 00:39:26,868 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 00:39:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:39:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:26,994 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-08-30 00:39:26,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-08-30 00:39:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:39:27,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:27,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:27,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327508675] [2023-08-30 00:39:27,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327508675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:27,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679967584] [2023-08-30 00:39:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:27,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 00:39:27,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:27,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:27,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 00:39:27,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:27,986 INFO L130 PetriNetUnfolder]: 9123/11440 cut-off events. [2023-08-30 00:39:27,986 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 00:39:27,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 11440 events. 9123/11440 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 53163 event pairs, 4118 based on Foata normal form. 0/3445 useless extension candidates. Maximal degree in co-relation 23161. Up to 11328 conditions per place. [2023-08-30 00:39:28,033 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-30 00:39:28,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 284 flow [2023-08-30 00:39:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-30 00:39:28,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840260798696005 [2023-08-30 00:39:28,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-30 00:39:28,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-30 00:39:28,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:28,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-30 00:39:28,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:28,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:28,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:28,041 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 204 flow. Second operand 3 states and 587 transitions. [2023-08-30 00:39:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 284 flow [2023-08-30 00:39:28,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 272 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 00:39:28,043 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 170 flow [2023-08-30 00:39:28,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-30 00:39:28,044 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 00:39:28,044 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 170 flow [2023-08-30 00:39:28,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:28,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:39:28,057 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 00:39:28,253 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 00:39:28,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:28,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash 772153, now seen corresponding path program 1 times [2023-08-30 00:39:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547874116] [2023-08-30 00:39:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:28,254 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 00:39:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:28,256 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 00:39:28,258 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 00:39:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:39:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:28,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:28,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:39:28,459 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 00:39:28,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:28,603 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 00:39:28,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547874116] [2023-08-30 00:39:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547874116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:28,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 00:39:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639574167] [2023-08-30 00:39:28,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:28,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:39:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:39:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:39:29,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-08-30 00:39:29,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:29,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:29,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-08-30 00:39:29,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:30,460 INFO L130 PetriNetUnfolder]: 9108/11423 cut-off events. [2023-08-30 00:39:30,460 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 00:39:30,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23129 conditions, 11423 events. 9108/11423 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 52339 event pairs, 4115 based on Foata normal form. 3/3445 useless extension candidates. Maximal degree in co-relation 23115. Up to 6560 conditions per place. [2023-08-30 00:39:30,508 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 83 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-08-30 00:39:30,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 438 flow [2023-08-30 00:39:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:39:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:39:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1144 transitions. [2023-08-30 00:39:30,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661776691116544 [2023-08-30 00:39:30,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1144 transitions. [2023-08-30 00:39:30,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1144 transitions. [2023-08-30 00:39:30,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:30,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1144 transitions. [2023-08-30 00:39:30,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:30,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:30,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:30,521 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 170 flow. Second operand 6 states and 1144 transitions. [2023-08-30 00:39:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 438 flow [2023-08-30 00:39:30,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 429 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 00:39:30,523 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 171 flow [2023-08-30 00:39:30,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-08-30 00:39:30,524 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-30 00:39:30,524 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 171 flow [2023-08-30 00:39:30,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:30,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:30,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:39:30,536 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 00:39:30,735 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 00:39:30,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:30,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 742142876, now seen corresponding path program 1 times [2023-08-30 00:39:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:30,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086193211] [2023-08-30 00:39:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:30,737 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 00:39:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:30,738 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 00:39:30,741 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 00:39:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:39:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:30,893 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-08-30 00:39:30,893 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 3 case distinctions, treesize of input 17 treesize of output 41 [2023-08-30 00:39:30,904 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 26 treesize of output 24 [2023-08-30 00:39:31,074 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 00:39:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:31,209 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 00:39:31,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:31,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086193211] [2023-08-30 00:39:31,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086193211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:31,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:31,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:39:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620631648] [2023-08-30 00:39:31,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:39:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:39:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:39:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 00:39:32,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:32,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:32,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 00:39:32,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:33,273 INFO L130 PetriNetUnfolder]: 8788/11005 cut-off events. [2023-08-30 00:39:33,273 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 00:39:33,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22296 conditions, 11005 events. 8788/11005 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 50136 event pairs, 3963 based on Foata normal form. 0/3374 useless extension candidates. Maximal degree in co-relation 22282. Up to 6355 conditions per place. [2023-08-30 00:39:33,330 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 84 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 00:39:33,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 429 flow [2023-08-30 00:39:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:39:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:39:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 942 transitions. [2023-08-30 00:39:33,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606356968215159 [2023-08-30 00:39:33,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 942 transitions. [2023-08-30 00:39:33,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 942 transitions. [2023-08-30 00:39:33,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:33,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 942 transitions. [2023-08-30 00:39:33,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.4) internal successors, (942), 5 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 00:39:33,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:33,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:33,340 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 171 flow. Second operand 5 states and 942 transitions. [2023-08-30 00:39:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 429 flow [2023-08-30 00:39:33,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 410 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 00:39:33,342 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 154 flow [2023-08-30 00:39:33,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-08-30 00:39:33,343 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-30 00:39:33,343 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 154 flow [2023-08-30 00:39:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:33,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:33,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:39:33,353 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 00:39:33,553 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 00:39:33,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:33,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 742142875, now seen corresponding path program 1 times [2023-08-30 00:39:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748087719] [2023-08-30 00:39:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:33,554 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 00:39:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:33,558 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 00:39:33,560 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 00:39:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:39:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:33,672 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:39:33,672 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-08-30 00:39:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:39:33,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:33,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:33,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748087719] [2023-08-30 00:39:33,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748087719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:33,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328212800] [2023-08-30 00:39:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:33,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-08-30 00:39:33,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:33,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:33,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-08-30 00:39:33,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:34,546 INFO L130 PetriNetUnfolder]: 8482/10601 cut-off events. [2023-08-30 00:39:34,546 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 00:39:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21482 conditions, 10601 events. 8482/10601 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48164 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21468. Up to 10489 conditions per place. [2023-08-30 00:39:34,587 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-30 00:39:34,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 244 flow [2023-08-30 00:39:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-30 00:39:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751426242868786 [2023-08-30 00:39:34,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-30 00:39:34,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-30 00:39:34,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:34,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-30 00:39:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:34,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:34,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:34,594 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 154 flow. Second operand 3 states and 583 transitions. [2023-08-30 00:39:34,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 244 flow [2023-08-30 00:39:34,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:39:34,596 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 147 flow [2023-08-30 00:39:34,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-30 00:39:34,597 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-08-30 00:39:34,597 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 147 flow [2023-08-30 00:39:34,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:34,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:34,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:39:34,609 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 00:39:34,806 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 00:39:34,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:34,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594973, now seen corresponding path program 2 times [2023-08-30 00:39:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:34,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198753438] [2023-08-30 00:39:34,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:39:34,808 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 00:39:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:34,809 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 00:39:34,811 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 00:39:34,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 00:39:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:39:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:39:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:34,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 00:39:34,956 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-08-30 00:39:34,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-08-30 00:39:34,974 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 00:39:34,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 00:39:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 00:39:35,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:35,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198753438] [2023-08-30 00:39:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198753438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:35,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:39:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585785013] [2023-08-30 00:39:35,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:39:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:39:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:39:37,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 00:39:37,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-08-30 00:39:37,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:37,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:37,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-08-30 00:39:37,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:38,025 INFO L130 PetriNetUnfolder]: 8482/10600 cut-off events. [2023-08-30 00:39:38,025 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-08-30 00:39:38,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21477 conditions, 10600 events. 8482/10600 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48366 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21463. Up to 10488 conditions per place. [2023-08-30 00:39:38,055 INFO L137 encePairwiseOnDemand]: 407/409 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-30 00:39:38,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 234 flow [2023-08-30 00:39:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:39:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:39:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 00:39:38,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710676446617767 [2023-08-30 00:39:38,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 00:39:38,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 00:39:38,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:38,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 00:39:38,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:38,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:38,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:38,061 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 147 flow. Second operand 3 states and 578 transitions. [2023-08-30 00:39:38,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 234 flow [2023-08-30 00:39:38,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:39:38,063 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2023-08-30 00:39:38,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-30 00:39:38,064 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-08-30 00:39:38,064 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2023-08-30 00:39:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:38,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:38,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 00:39:38,079 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 00:39:38,279 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 00:39:38,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:38,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:38,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594884, now seen corresponding path program 2 times [2023-08-30 00:39:38,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:38,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890236426] [2023-08-30 00:39:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:39:38,280 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 00:39:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:38,281 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 00:39:38,284 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 00:39:38,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:39:38,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:39:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:39:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:38,442 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:39:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:39:38,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:39:39,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890236426] [2023-08-30 00:39:39,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890236426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:39,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:39,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:39:39,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266206756] [2023-08-30 00:39:39,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:39,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:39:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:39,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:39:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:39:42,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 409 [2023-08-30 00:39:42,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:42,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:42,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 409 [2023-08-30 00:39:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:49,190 INFO L130 PetriNetUnfolder]: 43411/53956 cut-off events. [2023-08-30 00:39:49,191 INFO L131 PetriNetUnfolder]: For 1637/1637 co-relation queries the response was YES. [2023-08-30 00:39:49,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109922 conditions, 53956 events. 43411/53956 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 278895 event pairs, 19589 based on Foata normal form. 6/16924 useless extension candidates. Maximal degree in co-relation 109907. Up to 6140 conditions per place. [2023-08-30 00:39:49,408 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 334 selfloop transitions, 12 changer transitions 0/349 dead transitions. [2023-08-30 00:39:49,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 349 transitions, 1533 flow [2023-08-30 00:39:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:39:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:39:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2464 transitions. [2023-08-30 00:39:49,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020374898125509 [2023-08-30 00:39:49,415 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2464 transitions. [2023-08-30 00:39:49,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2464 transitions. [2023-08-30 00:39:49,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:49,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2464 transitions. [2023-08-30 00:39:49,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 205.33333333333334) internal successors, (2464), 12 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:49,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:49,427 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:49,427 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 2464 transitions. [2023-08-30 00:39:49,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 349 transitions, 1533 flow [2023-08-30 00:39:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 349 transitions, 1532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:39:49,439 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 227 flow [2023-08-30 00:39:49,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=227, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-30 00:39:49,441 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-30 00:39:49,441 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 227 flow [2023-08-30 00:39:49,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:49,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:49,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:39:49,455 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 00:39:49,652 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 00:39:49,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:49,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585866, now seen corresponding path program 1 times [2023-08-30 00:39:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916856504] [2023-08-30 00:39:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:49,653 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 00:39:49,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:49,654 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 00:39:49,655 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 00:39:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 00:39:49,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:49,768 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 00:39:49,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 00:39:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:39:49,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:49,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:49,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916856504] [2023-08-30 00:39:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916856504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:49,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:39:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493768376] [2023-08-30 00:39:49,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:39:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:39:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:39:49,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 409 [2023-08-30 00:39:49,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:49,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:49,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 409 [2023-08-30 00:39:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:52,507 INFO L130 PetriNetUnfolder]: 26945/33788 cut-off events. [2023-08-30 00:39:52,507 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-08-30 00:39:52,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68825 conditions, 33788 events. 26945/33788 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 169677 event pairs, 11868 based on Foata normal form. 0/11939 useless extension candidates. Maximal degree in co-relation 68802. Up to 33397 conditions per place. [2023-08-30 00:39:52,869 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 45 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-08-30 00:39:52,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 53 transitions, 321 flow [2023-08-30 00:39:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:39:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:39:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2023-08-30 00:39:52,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031784841075793 [2023-08-30 00:39:52,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2023-08-30 00:39:52,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2023-08-30 00:39:52,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:52,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2023-08-30 00:39:52,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:52,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:52,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:52,876 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 227 flow. Second operand 4 states and 704 transitions. [2023-08-30 00:39:52,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 53 transitions, 321 flow [2023-08-30 00:39:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:39:52,880 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 220 flow [2023-08-30 00:39:52,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-08-30 00:39:52,881 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-30 00:39:52,881 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 220 flow [2023-08-30 00:39:52,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:52,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:52,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 00:39:52,893 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 00:39:53,090 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 00:39:53,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:53,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585893, now seen corresponding path program 1 times [2023-08-30 00:39:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:53,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998549942] [2023-08-30 00:39:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:53,091 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 00:39:53,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:53,092 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 00:39:53,098 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 00:39:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:39:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:53,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:53,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:39:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:39:53,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:39:53,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:53,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998549942] [2023-08-30 00:39:53,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998549942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:39:53,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:39:53,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:39:53,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254871668] [2023-08-30 00:39:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:39:53,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:39:53,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:39:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:39:53,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-08-30 00:39:53,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:53,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:53,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-08-30 00:39:53,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:39:57,436 INFO L130 PetriNetUnfolder]: 37949/48572 cut-off events. [2023-08-30 00:39:57,437 INFO L131 PetriNetUnfolder]: For 1882/1882 co-relation queries the response was YES. [2023-08-30 00:39:57,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99338 conditions, 48572 events. 37949/48572 cut-off events. For 1882/1882 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 269488 event pairs, 8548 based on Foata normal form. 0/19556 useless extension candidates. Maximal degree in co-relation 99314. Up to 30904 conditions per place. [2023-08-30 00:39:57,635 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 73 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2023-08-30 00:39:57,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 449 flow [2023-08-30 00:39:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:39:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:39:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 945 transitions. [2023-08-30 00:39:57,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621026894865526 [2023-08-30 00:39:57,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 945 transitions. [2023-08-30 00:39:57,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 945 transitions. [2023-08-30 00:39:57,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:39:57,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 945 transitions. [2023-08-30 00:39:57,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:57,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:57,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:57,643 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 220 flow. Second operand 5 states and 945 transitions. [2023-08-30 00:39:57,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 449 flow [2023-08-30 00:39:57,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:39:57,645 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 245 flow [2023-08-30 00:39:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-30 00:39:57,646 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-08-30 00:39:57,646 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 245 flow [2023-08-30 00:39:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:39:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:39:57,656 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 00:39:57,855 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 00:39:57,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:39:57,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:39:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash 234748074, now seen corresponding path program 1 times [2023-08-30 00:39:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:39:57,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521441457] [2023-08-30 00:39:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:39:57,857 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 00:39:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:39:57,858 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 00:39:57,860 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 00:39:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:39:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:39:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:39:58,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:39:58,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:39:58,174 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 00:39:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:39:58,341 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 00:39:58,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:39:58,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521441457] [2023-08-30 00:39:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521441457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:39:58,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:39:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 00:39:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868340348] [2023-08-30 00:39:58,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:39:58,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 00:39:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:39:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 00:39:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 00:39:59,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-08-30 00:39:59,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:39:59,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:39:59,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-08-30 00:39:59,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:02,586 INFO L130 PetriNetUnfolder]: 31546/40642 cut-off events. [2023-08-30 00:40:02,586 INFO L131 PetriNetUnfolder]: For 4844/5731 co-relation queries the response was YES. [2023-08-30 00:40:02,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90125 conditions, 40642 events. 31546/40642 cut-off events. For 4844/5731 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 227780 event pairs, 16100 based on Foata normal form. 887/18951 useless extension candidates. Maximal degree in co-relation 90100. Up to 36844 conditions per place. [2023-08-30 00:40:02,798 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 80 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-30 00:40:02,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 502 flow [2023-08-30 00:40:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:40:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:40:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2023-08-30 00:40:02,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45330073349633254 [2023-08-30 00:40:02,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2023-08-30 00:40:02,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2023-08-30 00:40:02,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:02,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2023-08-30 00:40:02,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:02,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:02,804 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:02,804 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 245 flow. Second operand 5 states and 927 transitions. [2023-08-30 00:40:02,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 502 flow [2023-08-30 00:40:02,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:40:02,808 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 234 flow [2023-08-30 00:40:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-30 00:40:02,809 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-08-30 00:40:02,809 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 234 flow [2023-08-30 00:40:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:02,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:40:03,021 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 00:40:03,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:03,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 234748073, now seen corresponding path program 1 times [2023-08-30 00:40:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780093475] [2023-08-30 00:40:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:03,022 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 00:40:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:03,024 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 00:40:03,025 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 00:40:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:40:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:03,172 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 00:40:03,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 00:40:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:40:03,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:40:03,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780093475] [2023-08-30 00:40:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780093475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:40:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:40:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:40:03,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675984926] [2023-08-30 00:40:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:40:03,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:40:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:40:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:40:03,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 409 [2023-08-30 00:40:03,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:03,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:03,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 409 [2023-08-30 00:40:03,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:06,408 INFO L130 PetriNetUnfolder]: 30210/38784 cut-off events. [2023-08-30 00:40:06,409 INFO L131 PetriNetUnfolder]: For 4566/5391 co-relation queries the response was YES. [2023-08-30 00:40:06,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84307 conditions, 38784 events. 30210/38784 cut-off events. For 4566/5391 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 213171 event pairs, 15358 based on Foata normal form. 825/18305 useless extension candidates. Maximal degree in co-relation 84282. Up to 38307 conditions per place. [2023-08-30 00:40:06,594 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 00:40:06,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 51 transitions, 326 flow [2023-08-30 00:40:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:40:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:40:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-08-30 00:40:06,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612876935615322 [2023-08-30 00:40:06,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-08-30 00:40:06,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-08-30 00:40:06,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:06,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-08-30 00:40:06,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:06,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:06,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:06,599 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 234 flow. Second operand 3 states and 566 transitions. [2023-08-30 00:40:06,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 51 transitions, 326 flow [2023-08-30 00:40:06,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 51 transitions, 321 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 00:40:06,610 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 227 flow [2023-08-30 00:40:06,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-08-30 00:40:06,611 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-30 00:40:06,611 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 227 flow [2023-08-30 00:40:06,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:06,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:06,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:06,625 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 00:40:06,821 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 00:40:06,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:06,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 234524665, now seen corresponding path program 1 times [2023-08-30 00:40:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935291796] [2023-08-30 00:40:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:06,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:40:06,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:06,824 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 00:40:06,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 00:40:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 00:40:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:40:06,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:40:06,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935291796] [2023-08-30 00:40:06,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935291796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:40:06,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:40:06,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:40:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707106374] [2023-08-30 00:40:06,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:40:06,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:40:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:40:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:40:06,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-08-30 00:40:06,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:06,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:06,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-08-30 00:40:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:10,129 INFO L130 PetriNetUnfolder]: 31596/40170 cut-off events. [2023-08-30 00:40:10,129 INFO L131 PetriNetUnfolder]: For 3495/4320 co-relation queries the response was YES. [2023-08-30 00:40:10,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 40170 events. 31596/40170 cut-off events. For 3495/4320 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 219543 event pairs, 5715 based on Foata normal form. 1659/19157 useless extension candidates. Maximal degree in co-relation 86972. Up to 26499 conditions per place. [2023-08-30 00:40:10,338 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 66 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-30 00:40:10,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 420 flow [2023-08-30 00:40:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:40:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:40:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-30 00:40:10,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979625101874491 [2023-08-30 00:40:10,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-30 00:40:10,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-30 00:40:10,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:10,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-30 00:40:10,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:10,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:10,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:10,343 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 227 flow. Second operand 3 states and 611 transitions. [2023-08-30 00:40:10,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 420 flow [2023-08-30 00:40:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:40:10,353 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 232 flow [2023-08-30 00:40:10,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-30 00:40:10,354 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-30 00:40:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 232 flow [2023-08-30 00:40:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:10,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:10,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:10,362 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 00:40:10,560 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 00:40:10,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:10,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750536, now seen corresponding path program 1 times [2023-08-30 00:40:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:10,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870767249] [2023-08-30 00:40:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:10,562 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 00:40:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:10,563 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 00:40:10,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 00:40:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:40:10,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:40:10,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:40:10,834 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 25 treesize of output 21 [2023-08-30 00:40:11,011 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 00:40:11,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870767249] [2023-08-30 00:40:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870767249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:40:11,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:40:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:40:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839044833] [2023-08-30 00:40:11,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:40:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:40:11,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:40:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:40:12,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2023-08-30 00:40:12,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:12,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:12,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2023-08-30 00:40:12,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:19,498 INFO L130 PetriNetUnfolder]: 56679/73869 cut-off events. [2023-08-30 00:40:19,498 INFO L131 PetriNetUnfolder]: For 13223/14989 co-relation queries the response was YES. [2023-08-30 00:40:19,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163011 conditions, 73869 events. 56679/73869 cut-off events. For 13223/14989 co-relation queries the response was YES. Maximal size of possible extension queue 3635. Compared 457834 event pairs, 10577 based on Foata normal form. 1766/37352 useless extension candidates. Maximal degree in co-relation 162986. Up to 24832 conditions per place. [2023-08-30 00:40:19,845 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 159 selfloop transitions, 20 changer transitions 0/181 dead transitions. [2023-08-30 00:40:19,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 181 transitions, 947 flow [2023-08-30 00:40:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:40:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:40:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2058 transitions. [2023-08-30 00:40:19,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45743498555234496 [2023-08-30 00:40:19,849 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2058 transitions. [2023-08-30 00:40:19,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2058 transitions. [2023-08-30 00:40:19,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:19,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2058 transitions. [2023-08-30 00:40:19,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.0909090909091) internal successors, (2058), 11 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:19,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:19,858 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:19,858 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 232 flow. Second operand 11 states and 2058 transitions. [2023-08-30 00:40:19,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 181 transitions, 947 flow [2023-08-30 00:40:19,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 181 transitions, 925 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:40:19,864 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 348 flow [2023-08-30 00:40:19,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=348, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-08-30 00:40:19,865 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-08-30 00:40:19,865 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 348 flow [2023-08-30 00:40:19,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:19,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:19,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:19,880 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 00:40:20,074 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 00:40:20,074 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:20,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750509, now seen corresponding path program 1 times [2023-08-30 00:40:20,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:20,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509684720] [2023-08-30 00:40:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:20,075 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 00:40:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:20,076 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 00:40:20,077 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 00:40:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:40:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:20,247 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:40:20,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:40:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:40:20,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:40:20,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509684720] [2023-08-30 00:40:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509684720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:40:20,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:40:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:40:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662953862] [2023-08-30 00:40:20,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:40:20,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:40:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:40:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:40:20,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-08-30 00:40:20,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:20,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:20,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-08-30 00:40:20,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:26,738 INFO L130 PetriNetUnfolder]: 53142/68968 cut-off events. [2023-08-30 00:40:26,739 INFO L131 PetriNetUnfolder]: For 37414/39031 co-relation queries the response was YES. [2023-08-30 00:40:26,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184401 conditions, 68968 events. 53142/68968 cut-off events. For 37414/39031 co-relation queries the response was YES. Maximal size of possible extension queue 3385. Compared 419185 event pairs, 22966 based on Foata normal form. 1617/44744 useless extension candidates. Maximal degree in co-relation 184369. Up to 51474 conditions per place. [2023-08-30 00:40:27,173 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 72 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-30 00:40:27,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 582 flow [2023-08-30 00:40:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:40:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:40:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 924 transitions. [2023-08-30 00:40:27,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45183374083129585 [2023-08-30 00:40:27,176 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 924 transitions. [2023-08-30 00:40:27,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 924 transitions. [2023-08-30 00:40:27,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:27,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 924 transitions. [2023-08-30 00:40:27,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:27,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:27,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:27,180 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 348 flow. Second operand 5 states and 924 transitions. [2023-08-30 00:40:27,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 582 flow [2023-08-30 00:40:28,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 565 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 00:40:28,332 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 363 flow [2023-08-30 00:40:28,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2023-08-30 00:40:28,333 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2023-08-30 00:40:28,333 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 363 flow [2023-08-30 00:40:28,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:28,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:28,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:28,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 00:40:28,540 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 00:40:28,541 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:28,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1319717587, now seen corresponding path program 1 times [2023-08-30 00:40:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645836509] [2023-08-30 00:40:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:40:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:28,543 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 00:40:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 00:40:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:40:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:28,705 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:40:28,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:40:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:40:28,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:40:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:40:29,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645836509] [2023-08-30 00:40:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645836509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:40:29,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:40:29,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:40:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999666773] [2023-08-30 00:40:29,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:40:29,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 00:40:29,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 00:40:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 00:40:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-08-30 00:40:34,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 363 flow. Second operand has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:34,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:34,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-08-30 00:40:34,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:40,925 INFO L130 PetriNetUnfolder]: 49643/64865 cut-off events. [2023-08-30 00:40:40,925 INFO L131 PetriNetUnfolder]: For 78591/83995 co-relation queries the response was YES. [2023-08-30 00:40:41,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181182 conditions, 64865 events. 49643/64865 cut-off events. For 78591/83995 co-relation queries the response was YES. Maximal size of possible extension queue 3187. Compared 390279 event pairs, 26496 based on Foata normal form. 5526/48251 useless extension candidates. Maximal degree in co-relation 181150. Up to 56012 conditions per place. [2023-08-30 00:40:41,321 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 118 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-30 00:40:41,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 879 flow [2023-08-30 00:40:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:40:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:40:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1438 transitions. [2023-08-30 00:40:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394865525672372 [2023-08-30 00:40:41,325 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1438 transitions. [2023-08-30 00:40:41,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1438 transitions. [2023-08-30 00:40:41,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:41,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1438 transitions. [2023-08-30 00:40:41,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.75) internal successors, (1438), 8 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:41,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:41,330 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:41,330 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 363 flow. Second operand 8 states and 1438 transitions. [2023-08-30 00:40:41,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 879 flow [2023-08-30 00:40:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 847 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:40:41,422 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 364 flow [2023-08-30 00:40:41,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2023-08-30 00:40:41,423 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 00:40:41,423 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 364 flow [2023-08-30 00:40:41,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:41,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:41,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:41,436 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 00:40:41,633 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 00:40:41,633 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:41,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2040558231, now seen corresponding path program 1 times [2023-08-30 00:40:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:41,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827345096] [2023-08-30 00:40:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:40:41,634 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 00:40:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:41,635 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 00:40:41,636 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 00:40:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:40:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 00:40:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:40:41,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:40:41,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:41,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827345096] [2023-08-30 00:40:41,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827345096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:40:41,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:40:41,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:40:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68487792] [2023-08-30 00:40:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:40:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:40:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:40:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:40:41,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-08-30 00:40:41,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:41,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:41,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-08-30 00:40:41,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:40:46,823 INFO L130 PetriNetUnfolder]: 44932/58675 cut-off events. [2023-08-30 00:40:46,823 INFO L131 PetriNetUnfolder]: For 45564/53205 co-relation queries the response was YES. [2023-08-30 00:40:47,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160499 conditions, 58675 events. 44932/58675 cut-off events. For 45564/53205 co-relation queries the response was YES. Maximal size of possible extension queue 2940. Compared 359926 event pairs, 7433 based on Foata normal form. 8881/47663 useless extension candidates. Maximal degree in co-relation 160465. Up to 43614 conditions per place. [2023-08-30 00:40:47,189 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 73 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-08-30 00:40:47,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 580 flow [2023-08-30 00:40:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:40:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:40:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-30 00:40:47,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963325183374083 [2023-08-30 00:40:47,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-30 00:40:47,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-30 00:40:47,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:40:47,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-30 00:40:47,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,193 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 364 flow. Second operand 3 states and 609 transitions. [2023-08-30 00:40:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 580 flow [2023-08-30 00:40:47,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:40:47,259 INFO L231 Difference]: Finished difference. Result has 89 places, 62 transitions, 359 flow [2023-08-30 00:40:47,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=89, PETRI_TRANSITIONS=62} [2023-08-30 00:40:47,260 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-08-30 00:40:47,260 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 62 transitions, 359 flow [2023-08-30 00:40:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:47,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:40:47,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:40:47,267 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 (20)] Ended with exit code 0 [2023-08-30 00:40:47,460 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 00:40:47,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:40:47,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:40:47,461 INFO L85 PathProgramCache]: Analyzing trace with hash -761061214, now seen corresponding path program 2 times [2023-08-30 00:40:47,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:40:47,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996794261] [2023-08-30 00:40:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:40:47,462 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 00:40:47,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:40:47,462 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 00:40:47,464 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 00:40:47,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:40:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:40:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:40:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:40:47,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:40:47,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:40:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:40:47,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:40:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:40:48,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:40:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996794261] [2023-08-30 00:40:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996794261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:40:48,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:40:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 00:40:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270474260] [2023-08-30 00:40:48,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:40:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:40:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:40:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:40:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:40:53,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2023-08-30 00:40:53,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 62 transitions, 359 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:40:53,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:40:53,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2023-08-30 00:40:53,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:41:08,760 INFO L130 PetriNetUnfolder]: 107393/138543 cut-off events. [2023-08-30 00:41:08,760 INFO L131 PetriNetUnfolder]: For 146347/158019 co-relation queries the response was YES. [2023-08-30 00:41:09,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380869 conditions, 138543 events. 107393/138543 cut-off events. For 146347/158019 co-relation queries the response was YES. Maximal size of possible extension queue 6067. Compared 891159 event pairs, 10427 based on Foata normal form. 15800/107566 useless extension candidates. Maximal degree in co-relation 380835. Up to 29328 conditions per place. [2023-08-30 00:41:09,670 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 224 selfloop transitions, 19 changer transitions 0/246 dead transitions. [2023-08-30 00:41:09,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 246 transitions, 1609 flow [2023-08-30 00:41:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:41:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:41:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-08-30 00:41:09,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456768170704601 [2023-08-30 00:41:09,676 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-08-30 00:41:09,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-08-30 00:41:09,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:41:09,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-08-30 00:41:09,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:09,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:09,684 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:09,685 INFO L175 Difference]: Start difference. First operand has 89 places, 62 transitions, 359 flow. Second operand 11 states and 2055 transitions. [2023-08-30 00:41:09,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 246 transitions, 1609 flow [2023-08-30 00:41:09,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 246 transitions, 1577 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 00:41:09,801 INFO L231 Difference]: Finished difference. Result has 101 places, 71 transitions, 447 flow [2023-08-30 00:41:09,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=447, PETRI_PLACES=101, PETRI_TRANSITIONS=71} [2023-08-30 00:41:09,801 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 42 predicate places. [2023-08-30 00:41:09,802 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 71 transitions, 447 flow [2023-08-30 00:41:09,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:09,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:41:09,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:41:09,810 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 (21)] Ended with exit code 0 [2023-08-30 00:41:10,003 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 00:41:10,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:41:10,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:41:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1173589599, now seen corresponding path program 1 times [2023-08-30 00:41:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:41:10,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936081755] [2023-08-30 00:41:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:41:10,005 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 00:41:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:41:10,006 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 00:41:10,006 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 00:41:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:41:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:41:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:41:10,198 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 00:41:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:41:10,315 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 00:41:10,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:41:10,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936081755] [2023-08-30 00:41:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936081755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:41:10,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:41:10,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 00:41:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580999231] [2023-08-30 00:41:10,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:41:10,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:41:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:41:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:41:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:41:10,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-08-30 00:41:10,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 71 transitions, 447 flow. Second operand has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:10,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:41:10,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-08-30 00:41:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:41:22,353 INFO L130 PetriNetUnfolder]: 86839/116346 cut-off events. [2023-08-30 00:41:22,353 INFO L131 PetriNetUnfolder]: For 192952/211048 co-relation queries the response was YES. [2023-08-30 00:41:22,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373801 conditions, 116346 events. 86839/116346 cut-off events. For 192952/211048 co-relation queries the response was YES. Maximal size of possible extension queue 3911. Compared 751387 event pairs, 49645 based on Foata normal form. 18096/116116 useless extension candidates. Maximal degree in co-relation 373762. Up to 94316 conditions per place. [2023-08-30 00:41:23,183 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 130 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2023-08-30 00:41:23,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1064 flow [2023-08-30 00:41:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:41:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:41:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1477 transitions. [2023-08-30 00:41:23,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514058679706601 [2023-08-30 00:41:23,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1477 transitions. [2023-08-30 00:41:23,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1477 transitions. [2023-08-30 00:41:23,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:41:23,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1477 transitions. [2023-08-30 00:41:23,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:23,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:23,190 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:23,190 INFO L175 Difference]: Start difference. First operand has 101 places, 71 transitions, 447 flow. Second operand 8 states and 1477 transitions. [2023-08-30 00:41:23,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1064 flow [2023-08-30 00:41:23,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1045 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 00:41:23,402 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 468 flow [2023-08-30 00:41:23,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2023-08-30 00:41:23,402 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 49 predicate places. [2023-08-30 00:41:23,403 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 468 flow [2023-08-30 00:41:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:23,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:41:23,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:41:23,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:41:23,603 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 00:41:23,604 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:41:23,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:41:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1822482052, now seen corresponding path program 1 times [2023-08-30 00:41:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:41:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644443301] [2023-08-30 00:41:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:41:23,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 00:41:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:41:23,605 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 00:41:23,607 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 00:41:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:41:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 00:41:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:41:23,772 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 00:41:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-08-30 00:41:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:41:23,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:41:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:41:24,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:41:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644443301] [2023-08-30 00:41:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644443301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:41:24,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:41:24,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-08-30 00:41:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513539837] [2023-08-30 00:41:24,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 00:41:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:41:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:41:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:41:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:41:29,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-08-30 00:41:29,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 468 flow. Second operand has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:29,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:41:29,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-08-30 00:41:29,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:41:45,049 INFO L130 PetriNetUnfolder]: 110315/142336 cut-off events. [2023-08-30 00:41:45,049 INFO L131 PetriNetUnfolder]: For 178018/185539 co-relation queries the response was YES. [2023-08-30 00:41:45,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490634 conditions, 142336 events. 110315/142336 cut-off events. For 178018/185539 co-relation queries the response was YES. Maximal size of possible extension queue 6549. Compared 910361 event pairs, 61381 based on Foata normal form. 7543/124274 useless extension candidates. Maximal degree in co-relation 490592. Up to 127332 conditions per place. [2023-08-30 00:41:46,134 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 103 selfloop transitions, 8 changer transitions 3/118 dead transitions. [2023-08-30 00:41:46,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 118 transitions, 876 flow [2023-08-30 00:41:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:41:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:41:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1424 transitions. [2023-08-30 00:41:46,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352078239608802 [2023-08-30 00:41:46,137 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1424 transitions. [2023-08-30 00:41:46,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1424 transitions. [2023-08-30 00:41:46,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:41:46,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1424 transitions. [2023-08-30 00:41:46,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:46,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:46,141 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:46,141 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 468 flow. Second operand 8 states and 1424 transitions. [2023-08-30 00:41:46,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 118 transitions, 876 flow [2023-08-30 00:41:48,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 861 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 00:41:48,282 INFO L231 Difference]: Finished difference. Result has 110 places, 68 transitions, 442 flow [2023-08-30 00:41:48,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=110, PETRI_TRANSITIONS=68} [2023-08-30 00:41:48,282 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2023-08-30 00:41:48,282 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 68 transitions, 442 flow [2023-08-30 00:41:48,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:48,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:41:48,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:41:48,290 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 00:41:48,484 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 00:41:48,484 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-08-30 00:41:48,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:41:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1901873738, now seen corresponding path program 1 times [2023-08-30 00:41:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 00:41:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736538831] [2023-08-30 00:41:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:41:48,485 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 00:41:48,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 00:41:48,486 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 00:41:48,487 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 00:41:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:41:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 00:41:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:41:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 00:41:48,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:41:48,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 00:41:48,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736538831] [2023-08-30 00:41:48,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736538831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:41:48,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:41:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:41:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940050878] [2023-08-30 00:41:48,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:41:48,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:41:48,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 00:41:48,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:41:48,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:41:48,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-08-30 00:41:48,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 68 transitions, 442 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 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 00:41:48,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:41:48,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-08-30 00:41:48,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:41:57,892 INFO L130 PetriNetUnfolder]: 71239/93303 cut-off events. [2023-08-30 00:41:57,892 INFO L131 PetriNetUnfolder]: For 126811/141470 co-relation queries the response was YES. [2023-08-30 00:41:58,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313902 conditions, 93303 events. 71239/93303 cut-off events. For 126811/141470 co-relation queries the response was YES. Maximal size of possible extension queue 4391. Compared 596898 event pairs, 42557 based on Foata normal form. 21787/100119 useless extension candidates. Maximal degree in co-relation 313861. Up to 93186 conditions per place. [2023-08-30 00:41:58,872 INFO L137 encePairwiseOnDemand]: 407/409 looper letters, 60 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-30 00:41:58,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 67 transitions, 560 flow [2023-08-30 00:41:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:41:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:41:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 570 transitions. [2023-08-30 00:41:58,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46454767726161367 [2023-08-30 00:41:58,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 570 transitions. [2023-08-30 00:41:58,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 570 transitions. [2023-08-30 00:41:58,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:41:58,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 570 transitions. [2023-08-30 00:41:58,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:58,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:58,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:41:58,879 INFO L175 Difference]: Start difference. First operand has 110 places, 68 transitions, 442 flow. Second operand 3 states and 570 transitions. [2023-08-30 00:41:58,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 67 transitions, 560 flow